Introducing LaTeX Math Typesetting

[chroot]

Physicsforums.com is proud to introduce the addition of LaTeX mathematical typesetting to our forum software!

LaTeX is a professional-grade general typesetting system that centers around very pleasing mathematical presentation. Mathematical expressions are written in a markup style somewhat similar to HTML.

You may include LaTeX graphics in any post here on physicsforums.com (but not in private messages).

To include a LaTeX graphic, simply include your LaTeX code within the tags [ tex ] [ / tex ] or [ latex ] [ /latex ] (they are equivalent). The real tags do not include spaces.

For example, the code [ tex ] a^x_n [ /tex ] produces the graphic a^x_n.

Note that you can click on any LaTeX image and see a popup containing the code for the image.

A pdf file of the most useful LaTeX commands, symbols, and constructs is provided here:

http://www.physicsforums.com/misc/howtolatex.pdf

More symbol reference:

http://amath.colorado.edu/documentation/LaTeX/Symbols.pdf

A bit more information on the amsmath package is available here:

http://www.cds.caltech.edu/~dunbar/docs/amsldoc.pdf

Below, I'm providing some example graphics demonstrating a variety of techniques. Click on each to view its source code.


\frac{1}{2}



R^a{}_{bcd}



\nabla \times C



\mathbb{RC}


\lambda_j = \vec{\lambda} \cdot \vec{e}_j

\lambda_j = \mathbf{\lambda} \cdot \mathbf{e}_j


v(t) = v_0 + \frac{1}{2} a t^2



\gamma \equiv \frac{1}{\sqrt{1 - v^2/c^2}}



\ddot{x} = \frac {d^2x} {dt^2}



\overline{x}
\hat{x}
\check{x}
\tilde{x}
\acute{x}
\grave{x}
\dot{x}
\ddot{x}
\breve{x}
\bar{x}
\vec{x}
\underline{x}



\begin{align*}
ab\\
a b\\
a\! b\\
a\, b\\
a\: b\\
a\; b\\
\end{align*}



\begin{multline*}
a + b + c + d + e + f\\
+g+h+i+j+k+l+m+n
\end{multline*}



\begin{gather*}
a_1 = b_1 + c_1\\
a_2 = b_2 + c_2 - d_2 + e_2
\end{gather*}



e^x = \sum_{n=0}^\infty \frac{x^n}{n!} = \lim_{n\rightarrow\infty} (1+x/n)^n



\int_{0}^{1} x dx = \left[ \frac{1}{2}x^2 \right]_{0}^{1} = \frac{1}{2}



L = \int_a^b \left( g_{\it ij} \dot u^i \dot u^j \right)^{1/2} dt



\iiint f(x,y,z)\,dx\,dy\,dz



\lim_{\substack{x\rightarrow 0\\y\rightarrow 0}} f(x,y)



\idotsint_\textrm{paths} \exp{(iS(x,\dot{x})/\hbar)}\, \mathcal{D}x



A \alpha B \beta \Gamma \gamma \Delta \delta \dots \Phi \phi X \chi \Psi \psi \Omega \omega



\Gamma^l_{ki} = \frac{1}{2} g^{lj} (\partial_k g_{ij} + \partial_i g_{jk} - \partial_j g_{ki})



\sigma_{3} = \left(
\begin{array}{cc}
1 & 0\\
0 & -1
\end{array}
\right)



\begin{align*}
u &= \ln x \quad & dv &= x\,dx \\
du &= \mbox{$\frac{1}{x}\,dx$} & v &= \mbox{$\frac{1}{2} x^2$}
\end{align*}



\newcommand{\pd}[3]{ \frac{ \partial^{#3}{#1} }{ \partial {#2}^{#3} } }

i \hbar \pd{\Psi}{t}{} =
- \frac{\hbar^2}{2 m} \ \pd{\Psi}{x}{2} + V \Psi



\newcommand{\mean}[1]{{<\!\!{#1}\!\!>}}
\newcommand{\braket}[2]{{<\!\!{#1|#2}\!\!>}}
\newcommand{\braketop}[3]{{<\!\!{#1|\hat{#2}|#3}\!\!>}}

\braket{\phi}{\psi} \equiv \int \phi^*(x) \psi(x)\,dx



\begin{array}{l | c|c|c|c |} \ &\overline{A}\,\overline{B}&A\,\overline{B}&\overline{A}\, B&A\, B\\
\hline
\overline{C}&0&1&0&0\\
\hline C&1&0&1&1\\
\hline
\end{array}



\begin{equation*}
\begin{split}
\tau &= \tau_1+\tau_2 = \sqrt{{\Delta t_1}^2-{\Delta x_1}^2}+
\sqrt{{\Delta t_2}^2-{\Delta x_2}^2} \\
&= \sqrt{(5-0)^2-(4-0)^2}+\sqrt{(10-5)^2-(0-4)^2}\\
&= 3+3 = 6
\end{split}
\end{equation*}


Whenever you want to include a graphic on the same line with your text, like C H_4 or G_\textrm{diffeo} or y = mx + b, you should use [ itex ]...[ /itex ] instead of [ tex ]...[ /tex ]. The "i" means "inline."

Click on each of the examples above to "learn by example."

If you have questions or comments about this site addition, you are welcome to post them here!

Good luck, and enjoy the system. Please test here: http://at.org/~cola/tex2img/index.php

- Warren

[Ambitwistor]

Better:


\Gamma^l_{ki} = \frac{1}{2} g^{lj} (\partial_k g_{ij} + \partial_i g_{jk} - \partial_j g_{ki})


Italicizing subscripts is unnecessary when those subscripts are variables and such; on the other hand, if they're words, you want to switch to text formatting instead of equation formatting.

Examples of subscripting/superscripting:

Good:


x_i



G_{ij}


Bad:


G_{diffeo}


Good:


G_\textit{diffeo}


G_\textrm{diffeo}


Bad:


R^a_{bcd}


Good:


R^a{}_{bcd}


Okay:


x_i^2


Maybe better:


{x_i}^2

[ahrkron]

Some more examples:


{\cal L}_R = \sum_{i=1}^G
\bar{E}^i_R(i\kern+0.1em /\kern-0.55em \partial
- g_1Y_E \kern+0.1em /\kern-0.65em B)E^i_R +
\bar{D}^i_R(i\kern+0.1em /\kern-0.65em D
- g_1Y_D \kern+0.1em /\kern-0.65em B)D^i_R +
\bar{U}^i_R(i\kern+0.15em /\kern-0.65em D
- g_1Y_U \kern+0.1em /\kern-0.65em B)U^i_R


V = \left( \begin{array}{ccc}
1-\frac{1}{2}\lambda^2 & \lambda & A\lambda^3(\rho-i\eta) \\
-\lambda & 1-\frac{1}{2}\lambda^2 & A\lambda^2 \\
A\lambda^3(1-\rho-i\eta) & -A\lambda^2 & 1
\end{array} \right) + {\cal O}(\lambda^4)



\newcommand{\colv}[2] {\left(\begin{array}{c} #1 \\ #2 \end{array}\right)}
L_L &=& \left(
{\colv{\nu_e}{e}}_L,
{\colv{\nu_\mu}{\mu}}_L,
{\colv{\nu_\tau}{\tau}}_L\,
\right), \qquad Y_L = -\frac{1}{2}



\newcommand{\colv}[2] {\left(\begin{array}{c} #1 \\ #2 \end{array}\right)}
Q_L &=& \left(
{\colv{u}{d}}_L,
{\colv{c}{s}}_L,
{\colv{t}{b}}_L\,
\right), \qquad\quad\ Y_Q = \frac{1}{6}

[Ambitwistor]

\def\pds{\kern+0.1em /\kern-0.55em \partial}
\def\lts#1{\kern+0.1em /\kern-0.65em #1}
{\cal L}_R = \sum_{i=1}^G
\bar{E}^i_R(i\pds
- g_1Y_E \lts{B})E^i_R +
\bar{D}^i_R(i\lts{D}
- g_1Y_D \lts{B})D^i_R +
\bar{U}^i_R(i\lts{D}
- g_1Y_U \lts{B})U^i_R)


There's actually a whole 'slashed' package for this...

[chroot]

Feel free to propose a list of packages to be included here. I don't want to include tooooo many, for fear of slowing down image generation unnecessarily. On the other hand, I may eventually make the tag

[ tex usepackage=apackage,anotherpackage ] [ /tex ]

or similar.

- Warren

[krab]

Lemme try.

H_1 = - {\sin \phi - \sin \phi_{\rm s}\over \beta c} \,
\sum_{j} e V_j \delta
(\theta -\theta_j) \left(D\,{p_x\over p_0} - D'x \right)

Way cool. Say, can I use this (write a tex in physicsforums, preview it, save the resulting png, ...) to generate png's for my own web pages?

[chroot]

Originally posted by krab
Way cool. Say, can I use this (write a tex in physicsforums, preview it, save the resulting png, ...) to generate png's for my own web pages?
You can, but try not to bog the server down too much. If you'd like to see the source code for the conversion process so you can run it on your own machine, pm me.

- Warren

[Greg Bernhardt]

Originally posted by krab
Say, can I use this (write a tex in physicsforums, preview it, save the resulting png, ...) to generate png's for my own web pages? [/B]

I don't wish to burst your bubble krab, but please don't do this. The LaTeX generator was made for use strictly on PF. The resources needed to make these graphics can be relatively demanding.

[krab]

...but please don't do this... You're right of course; it wouldn't be fair.

Hey Warren. Your pm box is full. I'd love to see the source.

[ahrkron]

Originally posted by krab
Hey Warren. Your pm box is full. I'd love to see the source. [/B]

Same here!

Great job, Warren!

[Ambitwistor]

Originally posted by krab
Way cool. Say, can I use this (write a tex in physicsforums, preview it, save the resulting png, ...) to generate png's for my own web pages?

You could download software to make your own PNGs:

http://latex2rtf.sourceforge.net/
http://www.fourmilab.ch/webtools/textogif/textogif.html

or make them online:

http://www.equationsheet.com/entertex.php

but unless you have access to server-side scripting, you'd have to upload them all statically.

[jcsd]

Brilliant! now excuse me while I just get a little practice

e^+e^-\rightarrow u \bar{u}

e^+e^-\rightarrow \mu^+\mu^-

e^+e^-\rightarrow \gamma\gamma

i\hbar\frac{\partial\Psi}{\partial t} = \frac{\hbar^2}{2m}\frac{\partial^2\Psi}{\partial x^2} + V\Psi

[Hurkyl]

Here's a question:

I know how to write:


\lim_{x\rightarrow 0} f(x)


But how do I get two levels of subscripting here? For instance, if I want to write


\lim_{x\rightarrow 0,~y \rightarrow 0} f(x, y)


but have a two-line subscript instead of a long one-line subscript?

[Ambitwistor]

\lim_{\substack{x\rightarrow 0\\y\rightarrow 0}} f(x,y)

[eljose79]

in fct it seems to complicate for me ..are there equation editors for latex?..i mean programs to write math simbols without knowing nothing of latex and a button to write integrals and limits

[jcsd]

It's actually quite simple, I've never used it before, but reading through the tutorial it only took me a couple of minutes to work out how to write the simple equations above. Just try messing around with it to get a little practice. Quote the integral below to see the code for it:


\int_{0}^{1} \frac{x}{\sqrt{a^2 + x^2}} dx = \left[ \sqrt{a^2 + x^2} \right]_{0}^{1}

[chroot]

Originally posted by jcsd
Quote the integral below to see the code for it:
Small tip you may have overlooked jcsd: you can simply click on any LaTeX image to get a popup window displaying its code.

- Warren

[Monique]

Just write down the regular formula on a piece of paper and one by one write down the code in the browser, it is really easy that way! Try a few simple things and the code that looked so incredibly overwhelming a few minutes ago, will look very logical :)

[jcsd]

I didn't realize that Chroot, I had Pop-up Stopper on [:)]

[phoenixthoth]

scientific notebook lets you create things that look like math but when you save it, it's in tex (or latex?). i'm looking for other equation editors myself cuz there is one thing i don't like about scientific notebook.

how does one go about adding tex capabilities to their message board?

[Adrian Baker]

Lets have a go....

2\pi\sqrt{l/g}


\gamma \equiv \frac{1}{\sqrt{1 - v^2/c^2}}


edit: After three attempts I got it to work!!
[:)]

[chroot]

Displaying vectors can be tricky.

The default \vec LaTeX command produces a little arrow over the top of vectors, e.g.

\lambda_j = \vec{\lambda} \cdot \vec{e}_j

If you'd prefer to make your vectors boldface, just redefine the \vec command. See the source for this image to see how the command is redefined.


\renewcommand{\vec}[1]{\mbox{\boldmath $ #1 $}}

\lambda_j = \vec{\lambda} \cdot \vec{e}_j

- Warren

[lethe]

does this always generate display mode, or can we make it do inline mode as well?

[chroot]

Originally posted by lethe
does this always generate display mode, or can we make it do inline mode as well?
You mean, can you typeset your entire post in TeX and use $ $ to set off the math?

- Warren

[lethe]

Originally posted by chroot
You mean, can you typeset your entire post in TeX and use $ $ to set off the math?

- Warren

no, LaTeX has two modes, one for displaying equations inline (with $...$), where stuff is smaller, and another for display mode equations (\[ .... \]). the same equation will display differently depending on which you use. can we have access to both methods?

[chroot]

Originally posted by lethe
no, LaTeX has two modes, one for displaying equations inline (with $...$), where stuff is smaller, and another for display mode equations (\[ .... \]). the same equation will display differently depending on which you use. can we have access to both methods?
In what way are equations displayed differently in these two modes? AFAIK, math is displayed the same way in between $$ as in the displaymath environment.

- Warren

[Ambitwistor]

Display math:

\sum_i x^i

(inline) math, \mbox{$\sum_i x^i$}, hacked

[Ambitwistor]

Originally posted by chroot
In what way are equations displayed differently in these two modes? AFAIK, math is displayed the same way in between $$ as in the displaymath environment.

The 'displaymath' environment is the same as $$...$$, to show equations on a line by themselves, but $...$ is the 'math' environment, which is intended for equations inlined with other text.

[chroot]

Ambi,

Cool, I tried a few things and couldn't find anything that displayed differently!

Using \mbox is a fine way to do it.

- Warren

[chroot]

If it becomes a serious wishlist item for a lot of people, I can consider adding some attributes like mode=displaymath or mode=inline to the [ tex ] tag. Otherwise, \mbox is the easiest way to accomplish it.

- Warren

[lethe]

Originally posted by chroot
Ambi,

Cool, I tried a few things and couldn't find anything that displayed differently!

yeah, neither could i, because apparently the software doesn t recognize the inline mode commands...

Using \mbox is a fine way to do it.

OK, good enough

[chroot]

Originally posted by lethe
yeah, neither could i, because apparently the software doesn t recognize the inline mode commands...
No, I tried \mbox too -- but I tried y = mx + b, which looks the same in both environments, lol:

y = m x + b

\mbox{ $ y = m x + b $ }

- Warren

[lethe]

Originally posted by chroot
Otherwise, \mbox is the easiest way to accomplish it.

- Warren

do we have the amsmath package? mbox is a little limited, (like it doesn t go into subscripts very well), and \text is better.

[lethe]

Originally posted by chroot
No, I tried \mbox too -- but I tried y = mx + b, which looks the same in both environments, lol:


yeah, i think the only place where this makes a difference is for larger things like fractions, summations and integrations.

[Ambitwistor]

Originally posted by chroot
If it becomes a serious wishlist item for a lot of people, I can consider adding some attributes like mode=displaymath or mode=inline to the [ tex ] tag. Otherwise, \mbox is the easiest way to accomplish it.

It seems to me that typing "\mbox{}" is still easier than typing "mode=inline" ...

[Ambitwistor]

Yes, we have amsmath; I only recently started using it, so I keep forgetting about it...

However, if you're proposing \text as a replacement for \mbox in this instance ...

\mbox{$\sum_i x^i$}
\text{$\sum_i x^i$}

[lethe]

Originally posted by lethe
do we have the amsmath package? mbox is a little limited, (like it doesn t go into subscripts very well), and \text is better.

apparently not.

[lethe]

Originally posted by Ambitwistor
Yes, we have amsmath; I only recently started using it, so I keep forgetting about it...

However, if you're proposing \text as a replacement for \mbox in this instance ...


yes, it doesn t work... i assume that is because amsmath isn t loaded... or?

[lethe]

chroot-

on the pdf how-to provided on the first post of this thread, it states that [ tex ] is equivalent to $...$ (which makes inline math mode), but i guess what we have discovered here, is that it is actually equivalent to \[ ...\] (which makes display mode math).

perhaps the pdf can be updated?

[lethe]

Originally posted by lethe
. i assume that is because amsmath isn t loaded... or?

it seems that amsmath is loaded after all.

[chroot]

Yes, amsmath & amssymb are in fact available.

The code you type into [ tex ] tags goes directly into a \begin{displaymath}...\end{displaymath} environment. This can be changed if necessary. I assumed the majority of users would be putting equations set apart from their text, but this may not be a good assumption. I believe \mbox effectively just steps out it without any downsides.

- Warren

[Hurkyl]

Hrm,~line~breaks \\
don't~seem~to~work.

[Hurkyl]

All right, here's a new problem. How do I do this, but right?


\begin{array}{r l r l}
u &= \ln x \quad & dv &= x\,dx \\
du &= \frac{1}{x}\,dx & v &= \frac{1}{2} x^2
\end{array}

[lethe]

Originally posted by Hurkyl
All right, here's a new problem. How do I do this, but right?


i don t understand... what are you trying to do?

[Hurkyl]

There's too much space to the left of the equal signs. u=\ln x "should" be one entity instead of being spread over two seperate columns.

[Ambitwistor]

\begin{align}
u &= \ln x \quad & dv &= x\,dx \\
du &= \frac{1}{x}\,dx & v &= \frac{1}{2} x^2
\end{align}

[Ambitwistor]

\begin{align}
u &= \ln x \quad & dv &= x\,dx \\
du &= \mbox{$\frac{1}{x}\,dx$} & v &= \mbox{$\frac{1}{2} x^2$}
\end{align}

[jcsd]

If I want to denote the real and complex sets, using one of the below fonts which looks better?

\mathbb{RC}\mathbbmss{RC}\mathds{RC}

edited to add: it doesn't look like we have the other two fonts. There must be someway of represintg the real and complex sets in this manner, as the first fonts don't really look right to me.

[Ambitwistor]

Well, like it or not,

\mathbb{RC}

is pretty much the standard way of doing it in TeX.

There are other fonts and macros you can install, like bbold, mathbbol, doublestroke, bbm, mathpazo, etc., which all provide variations that are preferred by various people, but it's probably not worth the effort.

[jcsd]

I was just hpoing to get something more inline with what's in my textbooks, but I suppose the font is more than adequate.

[Monique]

How can LaTeX be made to look better in a Chemistry thread like this one?

http://www.physicsforums.com/showthread.php?s=&threadid=9475

I'd like the font smaller and the location more southwards.. any suggestions? Easy ones?

[Ambitwistor]

You might be able to hack in a smaller font, but there's no way around the subscript issue. The problem is that HTML doesn't know that the image is supposed to represent text with descenders in it, so it can't align the image's baseline with the normal HTML text surrounding it.

[chroot]

Actually, you can specify that images should be centered vertically within the line of text they're in -- I'm working on getting that attribute into the image tags. Politics, shmolitics.

- Warren

[Monique]

I just remembered that for simple annotations as that the sub and sup tags can be used :)

[chroot]

Update!

The LaTeX code has been improved a bit. I know you guys have been frustrated with the ugliness of inline TeX, so I went ahead and improved that.

I have introduced a new LaTeX command, the \inline command. Whenever you want to include a graphic inline with your text, like \inline{C H_4} or \inline{G_\textrm{diffeo}} or \inline{y = mx + b}, you should use the \inline{...} construct. Remember: click the LaTeX images to see how they're implemented.

Of course, you can inline larger pieces of TeX too, like \inline{\frac{1}{\sqrt{1 - v^2/c^2}}} or even \inline{e^x = \sum_{n=0}^\infty \frac{x^n}{n!} = \lim_{n\rightarrow\infty} (1+x/n)^n
}. But if makes more sense to include larger graphics set apart from your text, like this:

\frac{1}{\sqrt{1 - v^2/c^2}}

e^x = \sum_{n=0}^\infty \frac{x^n}{n!} = \lim_{n\rightarrow\infty} (1+x/n)^n

Note the difference in font sizing and layout between the normal and inlined graphics.

In addition, I have changed the TeX \vec command to boldface vectors. So feel free to use expressions like \inline{\vec{F} = m \vec{a}} to denote vector quantities.

Enjoy!

- Warren

[Hurkyl]

How do I get the arrows, then, if I want them?

[chroot]

Originally posted by Hurkyl
How do I get the arrows, then, if I want them?
Hmmm well, I thought I knew how, but now I'm not so sure. I'll have to look around. Maybe Ambitwistor knows a trick to put a command that has been \renew'd back to its default behavior.

Also, I found this pdf of useful mathematical constructs, that goes a bit beyond what we already have:

http://amath.colorado.edu/documentation/LaTeX/Symbols.pdf

- Warren

[Ambitwistor]

I don't know how to get a command back to its original behavior. You could try defining a new command to act like the original \vec before you redefine it. (Or else you could leave the original alone and define a new command to act like the bold version.)

[chroot]

Originally posted by Ambitwistor
I don't know how to get a command back to its original behavior. You could try defining a new command to act like the original \vec before you redefine it. (Or else you could leave the original alone and define a new command to act like the bold version.)
Both are good ideas. Generally, boldfacing is the "proper" way to represent vectors. Unfortunately, TeX treats lowercase greek letters and uppercase greek letters differently, making it fairly complicated to just boldface any old character. I put the macro into the system so people wouldn't have to jump through hoops if they just wanted to make a boldface \inline{\vec \lambda}.

Maybe redefining \boldmath to work everywhere is the best approach here, leaving \vec alone.

- Warren

[chroot]

I also just noticed that in IE6, the inline LaTeX images are a few pixels below the baseline of the text. In my preferred browser, Mozilla, they are exactly correct. Perhaps I need to tweak the site's style sheet to get the line spacing just right in all browsers. I'll have to think about it. In the meantime, everyone should switch to Mozilla Firebird! [:D]

- Warren

[chroot]

Actually, scratch that -- when the font size is set to "Medium" in the view menu, it's just right in IE6 too. (whew) Are any of you experiencing inline LaTeX graphics that are NOT aligned properly with your text?

- Warren

[chroot]

Also, Ambi, you LaTeX guru you,

Can you tell me why the font size is different between these two images?

\inline{
\int_{a}^{b}} e^x dx
}

\inline{
e^x = \sum_{n=0}^\infty \frac{x^n}{n!} = \lim_{n\rightarrow\infty} (1+x/n)^n
}

Look at the e^x... does the integral sign somehow cause the font size to change, or what?

- Warren

[lethe]

Originally posted by Hurkyl
How do I get the arrows, then, if I want them?

wouldn t it just be better to follow ams guidlines, and have \vec make an overline, and \mathbf make boldface? i much prefer boldface to arrows in print, but i don t see any reason to override ams defaults to get rid of arrows... they are not that bad...

[Hurkyl]

What about making a new tag, say, [ itex ] for inline tex? It gets annoying having to type [ tex ]\inline{x}[ /tex ] 10 times in a post!!!

[jcsd]

Your right it can be annoying, when I posted a load of inline text though, I just copied the commands onto the clipboard and pasted, changing the code between the inline brackets.

[chroot]

Originally posted by Hurkyl
What about making a new tag, say, [ itex ] for inline tex? It gets annoying having to type [ tex ]\inline{x}[ /tex ] 10 times in a post!!!
Yeah, I was strongly considering this from the beginning. Next time Greg lets me on the site, I'll do that.

- Warren

[chroot]

Okay guys, now [ itex ] ... [ /itex ] is equivalent to [ tex ]\inline{...}[ /tex ].

Have fun. [:)]

- Warren

[Hurkyl]

Woot!

[chroot]

Also, \vec now does \lambda_j = \vec{\lambda} \cdot \vec{e}_j while \mathbf does \lambda_j = \mathbf{\lambda} \cdot \mathbf{e}_j.

- Warren

[chroot]

And ams math environments should work now too:

a + b + c + d + e + f
+g+h+i+j+k+l+m+n


\begin{multline*}
a + b + c + d + e + f\\
+g+h+i+j+k+l+m+n
\end{multline*}



\begin{gather*}
a_1 = b_1 + c_1\\
a_2 = b_2 + c_2 - d_2 + e_2
\end{gather*}


- Warren

[chroot]

Guide to using the amsmath package:

http://www.cds.caltech.edu/~dunbar/docs/amsldoc.pdf

- Warren

[lethe]

noice

[Hurkyl]

What are all the spacers available to us? (like '~' and '\,')

(and remember, I'm a LaTeX newbie, so mentioning what they're supposed to do is nice [:)] probably should go in the .pdf too)

[Hurkyl]

Is there a smaller triangle that goes well here? What's the command for the floor and ceiling functions? Am I spelling the command for omicron wrong, or is omicron identical to 'o' so there isn't a command?

\Delta x \triangle x
\Delta x \triangle x

[Ambitwistor]

ab
a b
a\! b
a\, b
a\: b
a\; b

[Ambitwistor]

Originally posted by Hurkyl
Is there a smaller triangle that goes well here?

What do you want a triangle for?

What's the command for the floor and ceiling functions?

\lfloor x \rfloor, \lceil y \rceil

Am I spelling the command for omicron wrong, or is omicron identical to 'o' so there isn't a command?

The latter.

[Ambitwistor]

'~' isn't really intended to add space in LaTeX; it's just like a regular space, except it's non-breaking (LaTeX won't try to insert a line break there).

[Hurkyl]

f(x + \Delta x) = f(x) + f'(x) \Delta x + \varepsilon(\Delta x) \Delta x

The triangle seems a little on the big side to me.

[Ambitwistor]

The triangle seems a little on the big side to me.

The triangle, or the letter Delta? If you mean the triangle, what are you trying to use it for?

[Hurkyl]

Yes, it's the letter delta; I want to use it as one notates a differential or a difference, as in \Delta x (my previous post is the theorem I wanted to state in a post; I copped out with \delta x but I prefer the capital delta).

When I write it by hand, I usually write the delta as the same height as a lower case letter... but now that I've checked some reference material, it seems that the full-size is the norm; ah well. I'd still like to know if I can make a half sized one should I want to in a post. [:)]

[Ambitwistor]

It may not be too easy to get a small Delta of the correct size...

\Delta x
\mbox{\small $\displaystyle\Delta$} x

[Loren Booda]

I have trouble opening

http://www.physicsforums.com/misc/howtolatex.pdf

[jcsd]

Have you got Adobe Acrobat Reader?

http://www.adobe.com/products/acrobat/readstep2.html

[Hurkyl]

\frac{\mathbb{N}}{\mathbb{N}}=\mathbb{N}why am I over here?

For some reason this image contains a lot of whitespace on my browser; the text is all on the right side of the message!

[Loren Booda]

This LaTeX seems to be missing the Greek letter "omicron."

[chroot]

Originally posted by Loren Booda
This LaTeX seems to be missing the Greek letter "omicron."
All LaTeX is "missing" this character. The Greek omicron is exactly the same as the Roman 'o,' and thus has no special \omicron command. Just use 'o.' It's the same story with \Alpha and \Rho and so on.

- Warren

[chroot]

Hurkyl,

I'm not exactly sure why that's happening. Apprently it's the \frac command that's doing it, coupled with the way I crop inline images. (Inline images are cropped differently from display-mode images, so that they appear at the right location vertically). I'll have to do some more thorough experimenting next time I'm on the site. In the meantime, don't inline \frac I guess. [t)]

You can also inline it manual-style like this: \mbox{ \Large $ \frac{\mathbb{N}}{\mathbb{N}}=\mathbb{N} $}. Doing so renders the image as inline-mode, but crops the image as display-mode (meaning it may not appear at the right position vertically). It works, but that's a bit ridiculous. I'll look into it next time I get the chance.

- Warren

[Hurkyl]

One should probably use \mathbb{N}/\mathbb{N} style fractions in inline text anyways, but a bug is still a bug!

[vu3ogi]

Originally posted by Hurkyl
One should probably use \mathbb{N}/\mathbb{N} style fractions in inline text anyways, but a bug is still a bug!

I agree with Hurkyl. fraction type \frac{\mathbb{N}}{\mathbb{N}}=\mathbb{N} should only be used in equation ( or eqnarray), but while writing along with text we should use \mathbb{N}/\mathbb{N}

cheers,
Nagaraj
/**********************/
VU3OGI is my HAM callsign
/**********************/

[lethe]

any ideas why this isn t working?


\begin{multline*}
\tan^n \theta=\tan^{n-2}\theta \tan^2 \theta\\ =\tan^{n-2}\theta(\sec^2\theta-1)=\tan^{n-2}\theta\sec^2\theta-\tan^{n-2}\theta
\end{multline*}

[chroot]

Mainly because the environment is not called multiline, it's called multline (without the 'i'). Try this:


\begin{multline*}
\tan^n \theta=\tan^{n-2}\theta \tan^2 \theta\\ =\tan^{n-2}\theta(\sec^2\theta-1)=\tan^{n-2}\theta\sec^2\theta-\tan^{n-2}\theta
\end{multline*}


- Warren

[lethe]

Originally posted by chroot
Mainly because the environment is not called multiline, it's called multline (without the 'i'). Try this:


oops... i m an idiot.

thanks chroot.

[Hurkyl]

How do I make a script P, such as is typically used in the notation for a power set P(X)?

[Ambitwistor]

\mathcal{P}(X)

[mormonator_rm]

Hi folks!

I'm just setting up a practice spot for myself here. Don't mind me. These will be changing/dissappearing as I get new thoughts, but feel free to watch my struggles.


M^2 = \left(
\begin{array}{cc}
M^2_{11} & M^2_{18}\\
M^2_{18} & M^2_{88}
\end{array}
\right)



M^2_{88} = \frac {1}{3} \left(4m^2_{K} - m^2_{\pi}\right)



M^2_{11} = m^2_{\eta} + m^2_{\eta'} - M^2_{88}



M^2_{18} = - \sqrt{(M^2_{88} - m^2_{\eta})(m^2_{\eta'} - M^2_{88})}



\tan\theta_{P} = \frac {M^2_{88} - m^2_{\eta}}{M^2_{18}}


Dang this is freakin' cool!!!


\begin{multline*}
\eta = \eta_{8}\cos\theta_{P} - \eta_{1}\sin\theta_{P}\\
\eta' = \eta_{8}\sin\theta_{p} + \eta_{1}\cos\theta_{P}
\end{multline*}



\eta_{1} = \frac {u\bar{u} + d\bar{d} + s\bar{s}}{\sqrt{3}},
\eta_{8} = \frac {u\bar{u} + d\bar{d} - 2s\bar{s}}{\sqrt{6}}


I just can't stop...


\nu_e



\nu_e\bar

[jcsd]

\neq

What would be the symbol for 'not equivalent to' and how would you represent it in latex?

[jcsd]

Wouldn't it just be a crossed equivalent sign (or is that stronger than 'not equivalent to'?)? which I can't seem to get that anyway.

\nequiv \notequiv

[Ambitwistor]

\not\equiv

[jcsd]

thanks!

I was looking at a table of glyphs used in maths and it had that sign as 'not identical to' is that interchangable with 'not equivalent to' or can the sign mena both things?

[Ambitwistor]

The symbol can be read as either "identical" or "equivalent".

[Ambitwistor]

By the way, I never answered this...

Originally posted by chroot
Can you tell me why the font size is different between these two images?

\int_{a}^{b}} e^x dx

e^x = \sum_{n=0}^\infty \frac{x^n}{n!} = \lim_{n\rightarrow\infty} (1+x/n)^n


Look at the TeX for the first one: it has an extra closing curly brace }. Thus, since the TeX expression is being implicitly enclosed within \inline{...}, that extra brace closes the inline, and the e^x dx is not inlined.

You don't need the curly braces here anyway... it should just be \int_a^b e^x\,dx.

[phantomAI]

Wow this is awesome, but is there a sperate program or way that I can do the Math Typesetting offline or find it as a standard software? I would like to be able to type out some mathematical notes for my self since my hand writing is a bit sloppy and my notebook becomes incoherent... [g)]

[master_coda]

Originally posted by phnatomAI
Wow this is awesome, but is there a sperate program or way that I can do the Math Typesetting offline or find it as a standard software? I would like to be able to type out some mathematical notes for my self since my hand writing is a bit sloppy and my notebook becomes incoherent... [g)]

You can use MiKTeX (http://www.miktex.org/) if you use Windows. If you use Linux, your distro should already have TeX and LaTeX software.

[lovin_physics05]

im kinda slow, andim not that advanced, so im tryin lil things. but i like this thing, ima be the only person in my class with a fully typed physics report.


f_{x}=f\cos\theta

[phantomAI]

Originally posted by master_coda
You can use MiKTeX (http://www.miktex.org/) if you use Windows. If you use Linux, your distro should already have TeX and LaTeX software.

I installed it but how do I use it? Do I just go to notepad and type up and save it as a .dvi file?

[futz]

Originally posted by phnatomAI
I installed it but how do I use it? Do I just go to notepad and type up and save it as a .dvi file?

You type it up in a regular text file, then save it with a .tex extension. Then, you need to compile it by typing "latex file" (no quotes, in Windows, at a DOS prompt, in the directory where the file is saved), where file.tex is the thing you just saved. This will generate a DVI file. With Miktex, you can then type "yap file", which opens the Yap DVI viewer.

Alternatively, you can output to a PDF file by typing "pdflatex file" at the prompt.

[chroot]

Unfortunately, LaTeX has a rather stiff learning curve.

Fortunately, there are 4.9 gabillion webpages to help you out. Just google around for some sample documents.

- Warren

[lethe]

can we make feynman diagrams?

\begin{fmfchar*}(40,25)
\fmfleft{em,ep}
\fmf{fermion}{em,Zee,ep}
\fmf{photon,label=$Z$}{Zee,Zff}
\fmf{fermion}{fb,Zff,f}
\fmfright{fb,f}______
\fmfdot{Zee,Zff}
\end{fmfchar*}

[chroot]

Originally posted by lethe
can we make feynman diagrams?
Not yet. I have considered adding the feynmf package, but, since it uses metafont, it would involve adding an additional stage to the image generation process. I'm not sure I want to go through all that trouble!

- Warren

[lethe]

Originally posted by chroot
Not yet. I have considered adding the feynmf package, but, since it uses metafont, it would involve adding an additional stage to the image generation process. I'm not sure I want to go through all that trouble!

- Warren

stop being so lazy!!!

just kidding, chroot.

actually, i just tried to get feynmf working on my computer, and failed. grr...

so i can sympathize.

[Hurkyl]

Just wondering!

\ddot{\smile}}

[Bob3141592]

I seem to be having a problem generating "n choose m"

Let's see if it works better here

x=({\colv{n}{m}})

Did that work?

[Bob3141592]

What's this? The sample I used as my template before just used the \colv command to line up two expressions over each other, but if I click the sample above that, I se a \newcommand statement that uses an array construct. Aha! Let's see if I can do that myself, as in


\newcommand{\colv}[2] {\left(\begin{array}{c} #1 \\ #2 \end{array}\right)}X = {\colv{n}{m}}

I hope that does the trick!

[Bob3141592]

Yes! Hallelluah! Now, let's see if that new command works as the first nonprintable line in a post and applies throughout it.

no, it's a transient macro. It has to go on every tex statement and gets forgotten on the /tex. Too bad.

\newcommand{\colv}[2] {\left(\begin{array}{c} #1 \\ #2 \end{array}\right)}\colv{n}{m} = \frac{n!}{(n-m)!m!}

\newcommand{\colv}[2] {\left(\begin{array}{c} #1 \\ #2 \end{array}\right)}\colv{n}{m} = \colv{n}{n-m}

Plus, it is so easy to mistype a brace as a parentheses! I hate it when that happens.

But, at least that's one problem down. Onwards to the prefix superscript next.

[master_coda]

If you want choose notation, just use

\binom{n}{m}=\binom{n}{n-m}

[Bob3141592]

This is a test - and a place to make experimental edits. I'll remove most of this post and post it with explanatory comments in the general math folder later.

Editing a long post doesn't always work (get a lot of "website not responding" errors). Let's see if shortening the post helps.

tbd

[Hurkyl]

You know, it doesn't all have to be written on one line.

[Bob3141592]

Originally posted by Hurkyl
You know, it doesn't all have to be written on one line.

Perhaps not, but it's been a fun (and frustrating!) exercise to learn LaTex, and get it to do exactly what I want it to. If I make compromises before I learn how to do it, I'll never learn what it's capable of.

[Bob3141592]

Originally posted by master_coda
If you want choose notation, just use

\binom{n}{m}=\binom{n}{n-m}

Thanks, Coda. That's much easier!

[Hurkyl]

I mean your actual LaTeX source code can be written across several lines, making it easier to read sometimes.

[Bob3141592]

Okay, back to experimenting/debugging tex:

Got it. Oh, happy day...er.. night.

[master_coda]

You do it like this:

3^n = \sum_{m=0}^n \left( \binom{n}{m} \cdot \sum_{p=0}^m \binom{m}{p} \right)

[Bob3141592]

Originally posted by master_coda
You do it like this:

I see. The \left and \right are generic, and you ave to supply the character specific delimiter following.

Thanks again!

I do wish LaTex had error messages, giving hints aout why it's parser is bailing out, but I guess that's a bit much to ask for. Ah well, if it was easy, anybody could do it. [:)]

[chroot]

Originally posted by Bob3141592
I see. The \left and \right are generic, and you ave to supply the character specific delimiter following.

Thanks again!

I do wish LaTex had error messages, giving hints aout why it's parser is bailing out, but I guess that's a bit much to ask for. Ah well, if it was easy, anybody could do it. [:)]
That sort of output IS generated by the latex program itself -- but getting that parsed into the PHP output would be a bear, basically.

I also have to add the fact that LaTeX errors are usually pretty unhelpful anyway, so there doesn't seem to be much reason to provide it for the user.

- Warren

[Bob3141592]

I've seen &=& used, but I don't understand the difference it makes. Is there a simple explanation? What's the & do in general, if it has a general interpretation.

This stuff is great. Not easy, I must admit, but definately worth it.

[master_coda]

Usually & acts as an alignment character. For example, in:


\begin{align*}
D^{-\nu}e^{at}&=\frac{1}{\Gamma(\nu)}e^{at}\int_0^t x^{\nu-1}e^{ax}\;dx \\
&=E_t(\nu,a)
\end{align*}


the & character specifies how the columns are supposed to be lined up. Note that \\ specifies the end of each line.

The & character is also used to separate columns in a matrix. If someone is using &=& to line up their equations instead of &=, they may be using matrices to align equations.

[Tron3k]

Just figuring this out...

y = a x^2 + b x + c
x = \frac{-b \pm \sqrt{b^2 - 4 a c}}{2 a}

[Silverious]

hmmmm

d = \frac{1}{2}a t^2

\sum F = ma

\lim_{x\rightarrow c} f(x) = L

0 \leq |x - c| \leq \delta

|f(x) - L| \leq \epsilon

F_g = G \frac{m_1 m_2}{d^2}

this = fun

[Allegro]

Let's give it a try (using TexAide):

\frac{{\sqrt s }}{{s - a^2 }}






\displaystyle{\int_2^4 {\left[ {8(t - 2)} \right]^{-0.5} dt = } \left[ {\frac{1}{{\sqrt 2 }}(t - 2)^{0.5} } \right]_2^4 = 1}


With compliments to TeXaide.

[phoenixthoth]

how do i go about installing such a thing on my discussion forum? any help much appreciated!

[Allegro]

Hello phoenixthoth,

#1.
Download TeXaide:
http://www.mathtype.com/en/products/TeXaide/

#2.
Type in an equation in TeXaide and copy it.

#3
Paste it in your message on the Physics Forum,then go to my previous message and click on quote,then you can see how it is done.

Delete all superfluous characters.


Best regards.

[phoenixthoth]

Originally posted by Allegro
Hello phoenixthoth,

#1.
Download TeXaide:
http://www.mathtype.com/en/products/TeXaide/

#2.
Type in an equation in TeXaide and copy it.
Paste it in your message on the Physics Forum,between:
First type: \displaystyle{.............}and finish with
where ....... is your equation.
Delete all superfluous characters.

#3.
Go to my previous message and click on quote,then you can see how it is done.

Best regards.

how do i go about installing such a thing on my discussion forum? any help much appreciated!

thanks for trying to help but that wasn't my question. let me try to be more careful.
0. i already know how to make equations appear on this forum.
1. i have my own discussion forum.
2. i want to install something that will enable me to do what i can do on this forum on that forum.

i tried mimetex (from http://www.forkosh.com/htdocs/mimetex.html), but i'm having trouble compiling their source files into a mimetex.cgi file. it would help trememdously to just have a copy of that cgi file in question so that i can put it on my server. when i tried compiling their source files, i got a bunch of errors that i suspect are related to the fact that i'm running windows or perhaps the compiler i'm using. i'm trying to get the anti-aliasing gif version to work by entering
cc -DAA mimetex.c gifsave.c -lm -o mimetex.cgi
but it gives lots of errors.

so if you know anything on how to install an equivalent gif generator that uses html, let me know. any help is appreciated!

[Hurkyl]

Oh no! The inline TeX no longer is aligned!

[chroot]

What in the world are you doing? It works fine for me... \vec F = m \vec a

And how about this? \TeX

If you put random text in, though.... hmmm who knows?

- Warren

[Hurkyl]

It's because I've written superscripted normal text.

[chroot]

Originally posted by Hurkyl
It's because I've written superscripted normal text.
Oh, of course... hmmm, yeah. There's really no way around that. [:(]

- Warren

[master_coda]

Originally posted by chroot
Oh, of course... hmmm, yeah. There's really no way around that. [:(]

- Warren

There really isn't any reason you would want superscripted text and tex in the same message anyway.

[Hurkyl]

I put a footnote in one of my messages. I had an itex formula in it, and I tend to put my footnote tags in superscripts1. Thus, the bug was discovered. [:(]



1: such as this one

[lethe]

what is going on with TeX today? is it broken?

see this (http://www.physicsforums.com/showthread.php?s=&postid=146523#post146523) thread

[lethe]

let's see if it works over here:

\int_M d\omega=\int_{\partial M}\omega

[chroot]

lethe, your link is apparently not valid. What is happening? As far as I know, \TeX is working fine.

- Warren

[lethe]

Originally posted by chroot
lethe, your link is apparently not valid. What is happening? As far as I know, \TeX is working fine.

- Warren

this morning, it seemed like LaTeX wasn't working. i guess i linked to a post that i later deleted or something. i guess that is why the link i gave didn't work (although i don't think a broken anchor is usually enough to break a link, but whatever.)

anyway, try this (http://www.physicsforums.com/showthread.php?s=&threadid=9975&perpage=40&pagenumber=1) link. look at matt grime's post near the bottom.

everywhere there should be a LaTeX image, intsead, you get "latex still being generated, please reload" messages. i was getting the same thing in my posts, which i later deleted in order to try to recify the problem.

at any rate, whatever the problem was, it seems to be fixed now, although you can still see the weird messages now.

[Hurkyl]

I can't figure out what's going on with this one (though I haven't tried a lot)

Using this theorem, if x^3 - x^2 - 8x + 12 has a rational root, then it can be written in the form p/q where p \in \{1, -1\} and q \in \{1, -1, 2, -2, 3, -3, 4, -4, 6, -6, 12, -12\}. Only 12 possibilities to try, so if one exists you can find it by exhaustion. [:)]

[chroot]

It seems to be due to the length of the itex element. I'll see if I can figure out what's up with it. In the meantime, please use the normal tex (not itex) tags to typeset this.

- Warren

[ilml]

a_x

[jhirlo]

I've downloaded that pdf file with code instuctions, but there's no "non equal" sign [8)] [8)] .[*(]

Do you know the code (it's for slashed equal sign)?

[chroot]

\neq

[BLUE_CHIP]

\Delta{T}
lux
V
R_1
R_{LDR}
\simeq{6V}
I

I=\frac{V_{out}-V_{LDR}}{R_1}

R=\frac{V}{I}

\Longrightarrow

....(1)
....(2)
(1),(2)


R_{LDR}=\frac{V_{LDR}R_1}{V_{out}-V_{LDR}}

R_1=\sqrt{(10^7-\lim_{R\rightarrow 0})}

R_{Max}
R_{Min}

=3162.27766
\simeq{3000}\Omega
\frac{\delta{y}}{\delta{x}}=\frac{9}{7.8}
=1\frac{1}{13}

R-R_1=m((lux)-(lux)_1)

R-8=-1\frac{1}{13}((lux)-4)
R=-1\frac{1}{13}(lux)+4\frac{4}{13}
13R-14(lux)=160
R=\frac{160-14(lux)}{13}
R=e^{\frac{160-14ln(lux)}{13}}
I=\frac{V}{R}
I=\frac{Q}{t}
ln(R)=\frac{1}{ln(lux)}
\frac{\pi}{6}(0.3)^{3}(7.07)g=\frac{\pi}{6}(0.3)^{ 3}(1.26)g+3\pi(0.88){u}(0.3)
[tex]u=\frac{d^{2}}{18\mu}[\tex]
[tex]\frac{ud\rho}{\mu}[\tex]

[outandbeyond2004]

I thought Latex did not work, but it did. The trouble seems to be with the Review message function. try \pm 8 and hit the check button. it is supposed to be plus-minus 8, but comes out f1 8. Latex does work after you send the message, tho.

[Janitor]

Alrighty------

Humble \pi

John Lennon \longleftrightarrowYoko Ono

Rev. Jim Bakker \heartsuit Jessica Hahn.

Beyonce' = \bigodot \bigodot

Charlie's Angels = \bigodot \bigodot \bigodot \bigodot \bigodot \bigodot

\exists Elvis iff \infty= -33.043034.

Hello Dave. I am your HAL-9000 heuristic, algorithmic digital computer. Would you like me to open the pod bay door? \bowtie \perp \parallel \frown

[Clausius2]

Anyone knows where can I download LaTex as a ZIP file? My download rate is too slow.

[Philcorp]

Ok. Ive been trying to know how to make a lower case script r (for example, like in Griffiths' Electrodynamics book) for about a year now.........i was wondering if anyone around here maybe knew how?

[JohnDubYa]

This board is another reason PHYSICS RULES!

Okay, I have to try this out

\int_\infty^0 \frac{\partial x}{\partial t}\,dx

[JohnDubYa]

He wants a script r. I am not sure how Griffith's r's look, but have you tried the calligraphic style?

Try R_{\cal R}


Try [ tex ]R_{\cal R}[ \tex ]

I don't think it works with lowercase.

[Cod]

Originally posted by JohnDubYa
He wants a script r. I am not sure how Griffith's r's look, but have you tried the calligraphic style?

Try R_{\cal R}


Try [ tex ]R_{\cal R}[ \tex ]

I don't think it works with lowercase.
You have to use a forward slash ( / ). It won't work if you use back slash ( \ ).

[Janitor]

x^3 + m^2


\partial\^2


i\hbar\frac{\partial\Psi}{\partial t} = \frac{\hbar^2}{2m}\frac{\partial^2\Psi}{\partial x^2} + V\Psi


\partial z

\partial_z

\partial^2

\partial\^2

\partial^2 + m^2

det[\partial^2 + m^2]

[JohnDubYa]

I am posting this demo for Dan:

\int_\infty^0 \sin(\theta)

[Hurkyl]

LaTeX doesn't seem to work yet in the new forums. [:(]

[Greg Bernhardt]

chroot still needs to install it, hopefully tonight

[JohnDubYa]

I still want this LaTeX capability for my own discussion boards for helping students with remedial math. Is it available? Can I buy it?

[chroot]

It's custom-designed, by me. If you'd like to contract me to work on your site, send me a PM....

- Warren

[chroot]

Testing...

x^{5000}

[chroot]

Testing...

\int_\infty^0 \sin(\theta)

[chroot]

Testing...


\gamma \equiv \frac{1}{\sqrt{1 - v^2/c^2}}

[chroot]

Testing...


R^{a}{}_{bcd}

[chroot]

All right folks, looks like LaTeX is back in business on the new pf. Feel free to let me know if anything seems not to work!

[chroot]

One more test!

a^x_n

[KSCphysics]

[ tex ]x^3[ \tex ]

[KSCphysics]

R^{x}{}_{bcd}

[Hurkyl]

Why are we getting these extra dashes?

[Michael D. Sewell]

\Delta(x) = v_o + 1/2at^2
cool^n

[Michael D. Sewell]

\Delta x = v_o - 1/2at^2
\Delta x = v_o - 1/2at^2
2drinks = meow^2

[chroot]

Why are we getting these extra dashes?
What extra dashes?

- Warren

[Hurkyl]

These dashes.

[chroot]

Hurkyl,

That's kinda funny. I don't see those dashes in my browser. Can you right click on a latex image and view it by itself in a new window? Do the dashes still appear there?

- Warren

[Hurkyl]

Nope.


BTW, someone else mentioned also having this problem, I don't remember who.

[chroot]

Hmmmmm. What browser are you using?

- Warren

[Hurkyl]

Opera 7.23

Sometimes they appear high like that, and sometimes they appear low.


Oh, and I get them in Netscape 7.0 too. (appearing low for the image I posted)

[chroot]

And this never used to happen in PF2? Does clicking on a latex image still bring up the little code dialog?

- Warren

[Hurkyl]

Never happened before the upgrade. And yes, I can still get the code popup.

[chroot]

Test... \beta

[Hurkyl]

And there still be a dash. It's low.

[chroot]

Test... \sqrt{x} \{sqrt}{x}

[chroot]

Testing... E = -grad\Phi

[chroot]

Testing... E = \grad\Phi

[chroot]

Testing... E = mc^2
E = -grad\Phi

[chroot]

Testing.. \sqrt x

[Hurkyl]

still dashes. All low.

[chroot]

Hurkyl,

I'm afraid it really may just be a bug in your browser.

- Warren

[Hurkyl]

The dash goes away if I take out the anchor tag.

Oddly, if I change "<a href..." to "<b href..." it shows up fine.

[chroot]

Right, your browser is not obeying the border=0 attribute on the images for some reason -- likely because of a style sheet or other bug.

- Warren

[chroot]

Test...... \infty

[JohnDubYa]

I am just testing the new LateX engine.

x = \int_\infty^0 \sin(\cos(\theta)) \,dx \frac{e^x}{\log(x)}

[hughes johnson]

e=mc^2
f=ma

Blah, blah, blah

[Hurkyl]

Hey, I don't see the dashes today. Woohoo! (I wonder how long it's been?)

[gnome]

Is there a way to force this to be displayed bigger:

{ a^{log_cb} = b^{log_ca}

and is there a way to make it clearer that c is a base?

[chroot]

Use an \mbox{} to step out of the default format, then use one of the font size commands to set the desired size.

\mbox{\large a^{\log_cb} = b^{\log_ca}}
\mbox{\Large a^{\log_cb} = b^{\log_ca}}
\mbox{\LARGE a^{\log_cb} = b^{\log_ca}}
\mbox{\huge a^{\log_cb} = b^{\log_ca}}
\mbox{\Huge a^{\log_cb} = b^{\log_ca}}

- Warren

[chroot]

Hey, I don't see the dashes today. Woohoo! (I wonder how long it's been?)
Whoops, I forgot to tell you I fixed that... :redface:

- Warren

[PRyckman]

Wow, I'd like to be involved in this but all those formulas are greek to me, the symbols.
I can't handle stuff like that, throughout school I was always daydreaming. I did well on the tests because I understood not because I studied. Eventually that was way to much for me though. But I never gave up on physics. I stuck to the theoretical side, there are many things left to prove. My mind always focused on the vastness of space, it's intricisies(sp?) It's explained and it's not. Since I heard E=mc2 I never doubted it. I took it as fact and thought about what it could mean. Where it's explanation stopped, and it's implications began.

So, Sorry I can't give any cool input on your thread chroot :) :P

I really appreciate your thought into mine though. Because like I said my math isn't as advanced as yours. I would never be able to prove anything if I can't get someone to help me.

[chroot]

We're not discussing anything in this thread, PRyckman. It started as a tutorial of PF's LaTeX math typesetting, and turned into a test thread. People are just posting random equations to learn how the typesetting works.

- Warren

[PRyckman]

yes i read the first 20 posts or so only and last 5 or 10

[gnome]

Why is this fraction not displaying correctly?

\mbox{\Huge B = \frac{1}{15} }

[Sauter]

\newcount\n
\n=1
\def\abc#1{
\ifnum\n<#1
\the\n \par
\advance\n by 1
\abc{#1}
\fi
}
\abc{10}

[Sauter]

Why is this fraction not displaying correctly?

\mbox{\Huge B = \frac{1}{15} }


\Huge B = \frac{1}{15}

[Sauter]

Why is this fraction not displaying correctly?

\mbox{\Huge B = \frac{1}{15} }

\mbox{\Huge B = $\frac{1}{15}$ }

[IooqXpooI]

Ehehehe.

\mbox{\Huge \frac{U_4^{T_1}}{\frac {M_0}{P_v(M_4)}}}

[gnome]

This is my first attempt to use tex locally.
I'm trying to produce a .gif or .png image of a tex-formatted equation.

I created this file, named logic1.tex:
\documentclass{article}
\begin{document}
\begin{flushleft}
\begin{displaymath}
\pi \models \phi \Rightarrow \psi \:\textrm{iff}\:\pi \not\models \phi \:\textrm{or}\:\pi \models \psi
\end{displaymath}
\end{flushleft}
\end{document}


When I run
>latex logic1.tex
it produces logic1.dvi which I can view with the kdvi viewer & it appears to be correct. But when I run
>textogif logic1.tex
or
>textogif -png logic1.tex
the resulting image file has the equation superimposed over a checkerboard-pattern background which makes it virtually impossible to read.

What am I doing wrong?

How about my logic1.tex file: is anything missing or extraneous?

[chroot]

The checkerboard pattern is the "standard" way to show that parts of an image are transparent. Try including the image in a web page to see how it looks.

- Warren

[gnome]

Thanks Warren.

But then, how can I make a png or gif image with a plain white background that I can send someone, to be opened with an ordinary viewer (not on a web page)?

[chroot]

Use one of the many utilities available for changing gif (or png) color tables.

- Warren

[Edwin]

V_e = \frac{c[v_1 - (v_1 - x)]}{v_1 + (v_1 - x)}



V_e = \frac{c[v_1 - (v_1 - x)]}{v_1 + (v_1 - x)}

V_e^2 \equiv \frac{c^2x^2}{(2v_1-x)(2v_1-x)}



\gamma \equiv \frac{1}{\sqrt{1 - v^2/c^2}}

V_e=v[\tex]

[tex]\gamma \equiv \frac{1}{\sqrt{1- \frac{c^2x^2}{(2v_1-x)(2v_1-x}}/c^2

\gamma \equiv \frac{1}{\sqrt{1- \frac{x^2}{(2v_1-x)(2v_1-x)}}}

\gamma \equiv \frac{1}{\sqrt{1- \frac{x^2}{(2v_1-x)(2v_1-x)}}}

[gnome]

Please take a look at post #4 on this thread
http://www.physicsforums.com/showthread.php?p=203474#post203474
and tell me what I should have done to make the line spacing and font size more consistent.

[Edwin]

V_e = \frac{c[v_1 - (v_1 - x)]}{v_1 + (v_1 - x)}



V_e = \frac{c[v_1 - (v_1 - x)]}{v_1 + (v_1 - x)}

V_e^2 \equiv \frac{c^2x^2}{(2v_1-x)(2v_1-x)}



\gamma \equiv \frac{1}{\sqrt{1 - v^2/c^2}}

V_e=v[\tex]

[tex]\gamma \equiv \frac{1}{\sqrt{1- \frac{c^2x^2}{(2v_1-x)(2v_1-x}}/c^2

\gamma \equiv \frac{1}{\sqrt{1- \frac{x^2}{(2v_1-x)(2v_1-x)}}}

\gamma \equiv \frac{1}{\sqrt{1- \frac{x^2}{(2v_1-x)(2v_1-x)}}}

[Hurkyl]

tell me what I should have done to make the line spacing and font size more consistent.

Believe it or not, the font size is consistent.

If you want better spacing, maybe you could put all of the equations in a single tex tag. Check the first page for an example.

[chroot]

Edwin,

Since you seem to be addicted to nesting pieces of TeX inside other pieces of TeX, I will advise you that you can use whitespace inside the [ tex ] tags to make your code easier to write (and read). In other words, code like this is fine (click the image to see the code):

\frac{
\frac{3}{4}
}{
\frac{1}{2}
}

- Warren

[Edwin]

Thanks Warren! That was a helpful bit of information :)


Best Regards,

Edwin

[Hurkyl]

If you're still working on your TeX identifier for the newsgroups, here's a good one to tweak it on:

http://www.physicsforums.com/showthread.php?t=24389

[justintime]

let me have a try!
a=b^3

[BobG]

We'll give it a try (doesn't look to promising in preview mode) But it almost works once posted.


\ddot\lambda + \omega^2_E \left(\frac{R_E}{a}\right)^2

Now, that's what we're looking for. Takes a little time to get the feel for the order and size, etc.

[chroot]

Bob:

It should work just fine in preview mode. Some browsers may cache images, and you may have to force them not to.

- Warren

[arildno]

Hi, I have a question concerning the following Latex/(Tex?) commands:
I tried to make a listing with the following command structure (within the environment delimited by the tex-brackets):
\begin{enumerate}
\item ...
\item ...
\end{enumerate}
This has for me always produced a numbered list for each \item included,
but when I tried it on PF, the numbers failed to appear, and the items did not appear on separate lines
(A similar result was with "itemize" rather than "enumerate", which usually have produced dots rather than numbers in front of the items included)

So, what's the listing commands I should use here?

[Vance]

\ddot\lambda + \omega^2_E \left(\frac{R_E}{a}\right)^2

[Vance]

Copy and paste works fine

[Vance]

I would like to make a question:
I know of Latex when using Linux system of my school, but there isnot Latex for Windows, right ? If I would like to practise learning Latex but in Windows, that is impossible right ?

Please help me, please forgive my newie question because I am actually a newie...Please....
:)
Thanks in advance

[chroot]

Look into a package called MikTeX for windows.

- Warren

[Vance]

Look into a package called MikTeX for windows.

- Warren
Thanks Warren a lot...

lol...
Regards

[Dr Transport]

With MikTeX installed, look at a Windows gui called TeXnic Center, which may indeed have MikTeX along with it. The link on tug.org was broken when I looked last, but I have been extrememly happy with it. I have also used WinEdit.

[TALewis]

Testing:


\mathcal{L}\{y\}=Y


\mathcal{L}\{y'\}=sY-y(0)


\mathcal{L}\{y''\}=s^2Y-sy(0) -y'(0)

[VNmaths]

Just testing

\int f(x)dx , x^2+y^2+z^2=1

[Pattielli]

Te sientas entre la gente
Cierras tu ojos
Y suenas que soy tuyo
Pero yo no siquiera se que estas ahi
Me gustaria tenerte entre mis brazos amor

[Pattielli]

Oh it can be centered....:sm:

[H-bar None]

Testing

\tau/=E/m

[undersun]

Hi,

I need a BIG VECTOR. Something like that

------->
<a,b,c,d>

How can I do this? I tried \vec but does not fires. Tnx for any help

[master_coda]

Hi,

I need a BIG VECTOR. Something like that

------->
<a,b,c,d>

How can I do this? I tried \vec but does not fires. Tnx for any help

Use \overrightarrow{ ... vector goes here ... }

[emporium]

\omega=\sqrt\frac{GM}{r^3}

x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}

f(x)=f(0)+f'(0)x+\frac{f''(0)x^2}{2!}+\frac{f'''(o )x^3}{3!}

\int{u\frac{dv}{dx}}=uv-\int{\frac{du}{dx}v}

\int{\frac{2x+1}{x^2-x-6}}=\int{\frac{A}{x+2}+\frac{B}{x-3}}=\frac{1}{2}A\ln{(x+2)} - \frac{1}{3}B\ln{(x-3)}

\frac{dy}{dx}=\lambda y\Rightarrow\frac{dx}{dy}=\frac{1}{\lambda y}\Rightarrow x=\frac{1}{\lambda}\int{\frac{1}{y}dy}\Rightarrow x=\frac{1}{\lambda}\ln{(y)}+C

\Rightarrow\lambda x-C=\ln{y}\Rightarrow e^{\lambda x}\times e^{-C}=y\Rightarrow y=Ae^{\lambda x}

y=\sin^{-1}\frac{1}{6}x\Rightarrow \sin y=\frac{1}{6}x\Rightarrow 6\sin y=x\Rightarrow \frac{dx}{dy}=6\cos y

\Rightarrow \frac{dy}{dx} = \frac{1}{6 \cos y}

\Rightarrow = \frac{1}{6 \sqrt{1-\sin^{2}y}}

\Rightarrow = \frac{1}{6\sqrt{1-\frac{1}{36}x^2}}

\Rightarrow = \frac{1}{ \sqrt { 36 - x^2 }}

\int{x^3 \sqrt{3x^{4}-2} dx}

[Pattielli]

\overrightarrow{(S,U,N,N,I,E)}

[robphy]

\begin{picture}(100,100)(0,0)
\put(0,0){\circle{3}}
\put(0,0){\line(1,0){100}}
\put(0,0){\line(0,1){100}}
\put(100,100){\circle{3}}
\put(50,10){\circle{3}}
\put(55,15){{\bf test} label}
\end{picture}



\begin{picture}(200,200)(0,0)
\multiput(0,0)(50,0){5}{\line(0,1){200}}\multiput( 0,0)(0,50){5}{\line(1,0){200}}
\end{picture}



\begin{picture}(200,200)(0,0)
\multiput(0,0)(40,10){5}{\line(1,4){40}}\multiput( 0,0)(10,40){5}{\line(4,1){160}}
\end{picture}

[jcsd]

\left[x^2 -5x -6\right]_{0}^{1}

---------

[alexepascual]

I have not read the whole thread ( I apologize) and I am totally new to Latex.
Typing the latex and memorizing the language sounds like a lot of work. I wonder if there is any shareware or freeware program with which I can write the equations by drag and drop and have the program write the latex for me.
I'll appreciate your help.
--Alex--

[TALewis]

It's not really a whole lot of work. Start small and learn as you go. There are really only a handful of structures you need to know in order to get started. Learn by example: you can click on any equation posted in any thread and see what the person typed to create that image.

[Pattielli]

I have not read the whole thread ( I apologize) and I am totally new to Latex.
Typing the latex and memorizing the language sounds like a lot of work. I wonder if there is any shareware or freeware program with which I can write the equations by drag and drop and have the program write the latex for me.
I'll appreciate your help.
--Alex--
Another option I think may be the Equation Object included in WinWord which can also be somewhat similar help for you...(smiling)

[robphy]

Another option I think may be the Equation Object included in WinWord which can also be somewhat similar help for you...(smiling)

I believe that the Equation Editor does not export LaTeX.
One has to use MathType http://www.dessci.com/en/products/mathtype/.


Other LaTeX editors
WinEdt http://www.winedt.com/
WinTeX http://www.tex-tools.de/main.html
WinShell http://www.winshell.de/

Maple and Mathematica can also export LaTeX.

[alexepascual]

Thanks guys for your information,
MathType sounds interesting. But as it costs $119, I downloaded TeXaid (form the same company). I'll explore the other products when I have the time.
I am a little confused by the statement on some of these products that they are not a LaTex system. It appears that you need two pieces of software that will work in conjucntion but I still don't understand what each one does.
I think TexAid should allow me to produce LaTex code to paste into the forum.
When I register for classes in fall, I'll buy Mathematica at academic price.
Thanks again,
--Alex--

[ahrkron]

Before buying Mathematica, ask in your University about it. Many universities have campus-wide licenses that allow students to use Mathematica from the University's network, and it is often the case that such benefits are not "common knowledge" among students.

[rayjohn01]

garamond ( greek)undefinedundefined

This is just a trial Ραυ , αβψδεφγηιξκλμνοπ;ρστθωςχυζ

Ραυξοην01

[alexepascual]

Thanks for your information ahrkron.

[Alem2000]

\int_{2}^{3} \frac{\arctan}{\sqrt{a^2 + x^2}}dx

[Alem2000]

why the hell wont it work?

[jcsd]

$$........$$

[Alem2000]

\int_{2}^{3} \frac{\arctan}{\sqrt{a^2 + x^2}}dx
....lol....Thanks jcsd....that was a really dumb mistake :rofl:

[jcsd]

You need to produce your equation you need to write:

$$\int_{2}^{3} \frac{\arctan}{\sqrt{a^2 + x^2}}dx$$

[Alem2000]

yeah i got it...thanks a million...that was gonna drive me crazy :rofl: :rofl: :rofl: :rofl:

[Alem2000]

\lim_{x\rightarrow \0} \sumf(x)\Delta = \int_{a}^{b}f(x) dx

[Daevren]

Does anyone know how I can get this to work locally with windows. I downloaded a couple of programs and I didn't really get any of them to actually show the fomulas.


\int_{0}^{h} \frac{1}{2\sqrt{hx}} dx =
\frac{1}{2\sqrt{h}}(2x^\frac{1}{2}) \vert_{0}^{h} = 1

[robphy]

You'll need a LaTeX distribution (for example, www.miktex.org).
Basically, you take the latex file (file.tex) and run latex on it.
You get file.dvi, which can be viewed in a dvi viewer (called yap in miktex).

[Math Is Hard]

Hi, I am trying to use latex to display a math problem but I am having a little trouble getting started, and the function I want to display is a little bit weird.

I(x) = e^ (the integral of -tan x dx)

I am not even sure it can display an integral as an exponent, but I seem to be having plenty of trouble just getting it to display e!

Thanks in advance for your help! :smile:

[master_coda]

Hi, I am trying to use latex to display a math problem but I am having a little trouble getting started, and the function I want to display is a little bit weird.

I(x) = e^ (the integral of -tan x dx)

I am not even sure it can display an integral as an exponent, but I seem to be having plenty of trouble just getting it to display e!

Thanks in advance for your help! :smile:

I(x)=e^{-\int tanx\:dx}

[Math Is Hard]

woo hoo! muchas gracias, master coda!

[TALewis]

Or even better, use \tan to make the tangent function to appear in upright letters:

e^{- \int \tan x \, dx}

[master_coda]

I knew it didn't quite look right. And I was looking so smart, too. :tongue2:

[Math Is Hard]

They both look lovely. And it helped me get my math question answered. Thanks!

[alexepascual]

This is a test. I am pasting LaTex code from TexAide. Let's see if it works.
% MathType!MTEF!2!1!+-
% feqaeaartrvr0aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuL wBLn
% hiov2DGi1BTfMBaeXatLxBI9gBaebbnrfifHhDYfgasaacH8sr ps0l
% bbf9q8WrFfeuY-Hhbbf9v8qqaqFr0xc9pk0xbba9q8WqFfea0-yr0R
% Yxir-Jbba9q8aq0-yq-He9q8qqQ8frFve9Fve9Ff0dmeaabaqaciGa
% caGaaeqabaaaamaaaOqaamaaEmaabaGaeqOXdygabaGaeuiQdK faca
% GLPmIaay5bSlaawQYiaiabg2da9maapeaabaGaeqOXdy2aaWba aSqa
% beaacqGHxiIkaaaabeqab0Gaey4kIipakmaabmaabaGaamiEaa Gaay
% jkaiaawMcaaiabeI8a5naabmaabaGaamiEaaGaayjkaiaawMca aiaa
% dsgacaWG4baaaa!46FB!
[latex]
\left\langle {\phi }
\mathrel{\left | {\vphantom {\phi \Psi }}
\right. \kern-\nulldelimiterspace}
{\Psi } \right\rangle = \int {\phi ^ * } \left( x \right)\psi \left( x \right)dx
[\latex]

[alexepascual]

OK, It didn't work.
I believe the text with percent signs at the beginning should be comments. I hope that is not interfeering.
But I do have the Latex code enclosed in the Latex delimiters. So, what's wrong?
I'll appreciate your help.
I'll next post just the LaTex part (to reduce the number of variables) and see what happens.

[alexepascual]

Second trial:
[latex]
\left\langle {\phi }
\mathrel{\left | {\vphantom {\phi \Psi }}
\right. \kern-\nulldelimiterspace}
{\Psi } \right\rangle = \int {\phi ^ * } \left( x \right)\psi \left( x \right)dx
[\latex]

[tex]\alpha[\tex]
[tex]x^2\sqrt{x}[\tex]

[chroot]

Alex,

The tags are [ tex ] and [ /tex ], not [ tex ] and [ \tex ]. Forward slash, not backslash.

- Warren

[alexepascual]

Thanks, Warren
Let's see:

\left\langle {\phi }
\mathrel{\left | {\vphantom {\phi \Psi }}
\right. \kern-\nulldelimiterspace}
{\Psi } \right\rangle = \int {\phi ^ * } \left( x \right)\psi \left( x \right)dx

Great!

[Loren Booda]

When I "preview post" to check my code, I am only allowed to preview once. Otherwise, the preview does not change. Because of this, I have been reverting to "post" all over again. What can I do?

[chroot]

It's your browser, not the site. Tell it to stop caching images that way.

- Warren

[flexten]

This is a test

[ tex ]
\nabla \times A = \left( {{{\partial A_z } \over {\partial y}} - {{\partial A_y } \over {\partial z}}} \right)i + \left( {{{\partial A_x } \over {\partial z}} - {{\partial A_z } \over {\partial x}}} \right)j + \left( {{{\partial A_y } \over {\partial x}} - {{\partial A_x } \over {\partial y}}} \right)k
[ /tex ]

[flexten]

Another, cause it sure isn't working yet from MathType:

\[
\nabla \times A = \left( {\frac{{\partial A_z }}{{\partial y}} - \frac{{\partial A_y }}{{\partial z}}} \right)i + \left( {\frac{{\partial A_x }}{{\partial z}} - \frac{{\partial A_z }}{{\partial x}}} \right)j + \left( {\frac{{\partial A_y }}{{\partial x}} - \frac{{\partial A_x }}{{\partial y}}} \right)k
\]


Maybe i got it !


\[
\nabla \times \,A = \frac{1}{{rsin\theta }}\left[ {\frac{{\partial (A_\phi sin\theta )}}{{\partial \theta }} - \frac{{\partial A_\theta }}{{\partial \phi }}} \right]\hat r + \frac{1}{r}\left[ {\frac{1}{{sin\theta }}\frac{{\partial A_r }}{{\partial \phi }} - \frac{{\partial (rA_\phi )}}{{\partial r}}} \right]\hat \theta + \frac{1}{r}\left[ {\frac{{\partial (rA_\theta )}}{{\partial r}} - \frac{{\partial A_r }}{{\partial \theta }}} \right]\hat \phi
\]


Cool ! But there seems to be a limit on width. I just type it into MathType
and choose the LaTeX 2 translator, then add latex in front and /latex
after (both in []), it works ! kinda.

[robphy]

When I "preview post" to check my code, I am only allowed to preview once. Otherwise, the preview does not change. Because of this, I have been reverting to "post" all over again. What can I do?

To preview beyond the first time, [on IE6] I do a "refresh". It tells me that it has to resend information in the forms. When I say okay, the images are refreshed to reflect the latest TeX-rendering changes.

[semiphor]

\eq x = \frac{-b \pm \sqrt{b^2-4ac} } {2a}


...wow - cool!

[maverick280857]

Just out of curiosity...whats the backend for conversion? Is it open source (I haven't seen the documentation in detail)?

Cheers
Vivek

[Hurkyl]

We have color?


\textcolor{red}{Test}
\begin{picture}(200,200)(0,0)
\put(50,50){\textcolor{green}{\line(1,1){50}}}
\end{picture}

[ahrkron]

\begin{picture}(130,90)
\put(0,5){\epsfxsize=12cm \epsfbox{11.eps}}
\put(0,90){$\tau_{B_c} $, ps}
\put(123,7){$\mu$, GeV}
\end{picture}

[alexepascual]

This is a test.
This is not Latex. Just trying to see how to do greek letters and subscripts in regular html.
α_i
Let's see how it looks.

Well, it didn't work. I have seen other people typing formulas without latex and I wonder how they do it.
What shows as "a" above I typed concatenating "&" "alpha" ";"
Does anybody know how to do this? I know how to do it in latex, I just want to know how to do it without latex.
I'll appreciate your help.

[robphy]

Like this?
abcdefghijklmnopqrstuvwxyz

[FONT = Symbol] abcdefghijklmnopqrstuvwxyz [ /FONT ] delete the spaces in the tags.

Symbol does not appear in the Font-menu.

[TALewis]

Bear in mind that not everybody has the Symbol font, and even if you do, it doesn't work everywhere because of certain issues.

[alexepascual]

Robphy:
I think that way of doing it would be adequate for typing a string of greek characters. I am not so sure it is for typing individual characters interspersed with regular letters as in physics equations.
I used to know how to do this and I forgot. But the way I did it was not the way you suggest.
I also need to do subscripts an superscripts.

I was looking at the Font drop-down box and I don't see the font "symbol". Maybe this is what TALewis is talking about. I do have the symbol font when I am using MS Word, but not here. So I guess these fonts are not handled by the operating system. Whatever the solution, I would like of course for everybody to be able to see those greek letters correctly.

[TALewis]

Math typesetting on the WWW has been one of the most frustrating things I have come across. Honestly, embedded images generated by LaTeX have been the best solution until something like MathML really gets into gear.

[alexepascual]

Thank you guys,
As answers to my question on this thread were slow to come at first and I figured that it might not be the best place to post a question about non-latex on a latex thread, I initiated a separate thread. I got more answers there and I think with those instructions I can do what I want. TALewis was very helpful on that thread.
Let's see if I can post a link to that thread:
Typing equations without latex (http://www.physicsforums.com/showthread.php?t=33515)

[Loren Booda]

chrootIt's your browser, not the site. Tell it to stop caching images that way. Would you mind going into more detail about "stop caching images" for this computer illiterate? My browser is Microsoft Explorer 6.0. Thanks.

[Tom D]

...
If you have questions or comments about this site addition, you are welcome to post them here!

Good luck, and enjoy the system.

- Warren

This is a most excellent welcome back ! Thank you.( I have been too busy to surf recently ).

[JonF]

\frac{3^{2/3}}{3x^{1/3}*((3x)^{2/3}+2)^{1/2}}

[JonF]

2\pi\int_{2}^{4} (3x^{2/3} +2)^{1/2}*(1 + (\frac{3^{2/3}}{3x^{1/3}*((3x)^{2/3}+2)^{1/2}})^2)^{1/2} dx

[speeding electron]

How do you write the sign for a line integral around a closed curve?

[chroot]

\oint f(x) dx

- Warren

[gerben]

How do you get multiple lines?
I have been trying for hours.
I can only could get multiple lines that were indented to random amount by using "\begin{multline} .....\end{multline}".
just using "//" does not seem to work.

[chroot]

gerben,

There are several ways. Examples of all these ways are provided on the first page of this thread. Click the images below to see their source code:


\begin{multline*}
a+b+c+d\\
+e+f+g+h
\end{multline*}



\begin{equation*}
\begin{split}
a+b+c+d\\
+e+f+g+h
\end{split}
\end{equation*}



\begin{equation*}
\begin{split}
&a+b+c+d\\
&+e+f+g+h
\end{split}
\end{equation*}



\begin{equation*}
\begin{split}
a+b&+c+d\\
+e+f+g&+h
\end{split}
\end{equation*}

[gerben]

Unfortunately, that gives aexactly the same results as using multline (I did indeed mistakenly type "//" in stead of "\\" in my previous post. I do use "//").


\begin{gather*}
G:\ \ gravitational\ constant\ (6.672\ 10^{-11}\ Nm^{2}kg^{-2}) \\
line 2
\end{gather*}

[chroot]

Use:


\begin{multline*}
\begin{split}
&G:\ \ gravitational\ constant\ (6.672\ 10^{-11}\ Nm^{2}kg^{-2}) \\
&line 2
\end{split}
\end{multline*}


as I already said.

Why on earth are you going to this much trouble just to post text anyway? Why use LaTeX formatting for mostly textual data?

- Warren

[gerben]

This does not work:


\begin{multline*}
G:\ gravitational\ bla\ bla \\
m1:\ your\ mass\\
\end{multline*}

[gerben]

Well chroot,
I wanted to post a message somewhere, with the following text:


\begin{gather*}
G:\ \ gravitational\ constant\ (6.672\ 10^{-11}\ Nm^{2}kg^{-2}) \\
m1:\ your\ mass\\
m2:\ mass\ of\ planet \\
r:\ \ distance\ from\ you\ to\ planet\ (from\ centre\ of\ your\ mass\ to\ centre\ of\ planet's\ mass) \\
F_z:\ \ force\ to\ between\ masses\\
\\
F_z\ =\ G\ \frac{m1\ m2}{r^2}\\
\\
on\ earth:\\
m1\ =\ \frac{F_z}{9.8}\\
\\
so,\ on\ planet:\\
m1\ =\ \ G\ \frac{m1\ m2}{r^2\ 9.8}
\end{gather*}


and I find it really annoying that I cannot get things nicely lined out at the start of the lines. Also some text after "...mass to" (it should have been "...mass to centre of planet's mass") is simply not shown.

[chroot]

I've already shown you twice how to do it. Besides, there's really no point in typesetting your entire post in LaTeX. That's really not what we intended our LaTeX system to do at all. Please format your post like this:

G: gravitational constant (6.672 \cdot 10^{-11}\ Nm^{2}kg^{-2})

F_z = G \frac{m1\ m2}{r^2}

etc.

- Warren

[gerben]

Ok, I see that I could do it line by line.
However it would be useful if we could just use the newline command ("/newline" or "//"). I just thought it looked ugly that the different parts of the text in my post were typeset in different fonts. I do not know much about latex but I thought going to a new line would be something fairly basic. Thanks anyway.

I ended up posting my post like this:


Well just disregard the first bracket please (sorry)...


\begin{multline*}
\begin{slpit}
&G:\ \ gravitational\ constant\ (6.672\ 10^{-11}\ Nm^{2}kg^{-2}) \\
&m1:\ your\ mass\\
&m2:\ mass\ of\ planet \\
&r:\ \ distance\ from\ you\ to\ planet\ (from\ centre\ of\ your\ mass\ to\ &centre\ of\ planet's\ mass) \\
&F_z:\ \ force\ between\ masses\\
&\\
&F_z\ =\ G\ \frac{m1\ m2}{r^2}\\
&\\
&on\ earth:\\
&m1\ =\ \frac{F_z}{9.8}\\
&\\
&so,\ on\ planet:\\
&m1\ =\ \ G\ \frac{m1\ m2}{9.8\ r^2}
\end{split}
\end{multline*}

[chroot]

Newlines are very basic in normal LaTeX. This is not normal LaTeX. This is math-mode LaTeX with a specific preamble to set up math options, ether math mode, and a specific raster backend to make images that fit into our site layout. All of this makes entering \int f(x) dx easy for our users.

If you really, really had some particular reason to need to use full-blown LaTeX, you can step out of math mode with \] and \[, like this:

\]
This is some sample LaTeX.\\Newlines work fine.

\[r=2\]

So do paragraph breaks.
\[

But I really ask that you don't do such a thing unless it's absolutely necessary.

- Warren

[robphy]

\begin{align}
x& = y && \text{def}\\
& = y+\textcolor{blue}{(y-y)} && \text{add \textcolor{blue}{zero}}\\
& = 2y-y && \text {\textcolor{red}{algebra}}
\end{align}




very plain text, slightlyfanciertext, loud text


\]

\begin{picture}(200,200)(0,0)\multiput(0,0)(40,10) {5}{\line(1,4){40}}\multiput( 0,0)(10,40){5}{\line(4,1){160}}
\put(0,0){\vector(1,4){170}}
\put(50,50){\circle*{10}}



\put(160,40){\framebox(80,40)[r]{ \textcolor{blue}{\bf \[ x_{Bob} \] } } }
\put(40,160){\textcolor{yellow}{\dashbox(80,40)[t]{ \textcolor{red}{ \[ t_{Bob} \] } } }}

\qbezier(100,100)(200,100)(200,200)
\linethickness{8pt}
\textcolor{green}{\qbezier(0,0)(0,100)(100,100)}
\linethickness{1pt}
\qbezier(0,0)(0,100)(100,100)

\end{picture}
\[





\newcommand{\VARTEXT}[2][\scriptsize]{\left(\mbox{#1\begin{tabular}{c}#2\end{tabular}}\ right)}



\VARTEXT[\large]{net-work done \\ on the object }
=
\VARTEXT[\large]{change in \\ the kinetic energy \\ of the object }

[chroot]

Cool examples robphy!

- Warren

[wisky40]

this is wisky40 I'm not sure about this, but I'm going to try to write something using
Latex...E=K\lambda\int_{-a}^a \frac{dx_1}{x_1+x_2+b}

[ExtravagantDreams]

How do I make this look better


a_0 (t)


where a0 is supposed to be a function of t and not a0 times t.

[chroot]

ExtravagentDreams,

It looks fine to me as it is... what do you think is wrong with it?

- Warren

[ExtravagantDreams]

a_0 (t) \partial a_0 = t^2 \partial t

I dont know. I just think it could sometimes be difficult to read and understand if it is ment to be a multiplication or a function of this variable.

I wonder if it would be better to use these {}


such as

F_g \{s,t\} = ...


Does that conflict with anything else? I don't think I have used any sets in this manner, then again there is much math I have still to see. But I think it would be a little more obvious that it isnt a set instead of it not being multiplication


F_g^{ \{s,t\} } = ...



F_g^{ (s,t) } = ...



F_g (s,t) = ...



F_g \{s\} = ...



F_g (s) = ...


try a font size change



F_g \mbox{\Large (s,t)}



F_g \mbox{\large (s,t)}



F_g^{\mbox{\HUGE (s,t) }} = ...

[chroot]

The parentheses are standard notation...

a_0 (t) is a function, a_0 t is a multiplication.

- Warren

[ExtravagantDreams]

I suppose that is a good point. Now I am having trouble getting the font size to work though

[chroot]

\mbox{\Huge a_0 t}

\mbox{\LARGE a_0 t}

\mbox{\Large a_0 t}

\mbox{\large a_0 t}

- Warren

[plover]

All four of those a0t's are formatted to the same size on my screen.

EDIT: The sizes are fixed now.

[zeronem]

If you overload your post with too much latex math writing? Will it come out as errors?

Since, I think I may be doing so. As I was trying to verify in my post how I implicitly differentiated this equation, I used alot of Latex Math writing to show my work. Then I preview it and it comes out with unsuccessful results.

EDIT MESSAGE: Nevermind, I found a couple of errors in my latex math writing. I fixed them and it came out great.

[Gonzolo]

v = A\sin(\omega t + \epsilon + \phi)
+ \sum

k = \sqrt{\omega\kappa}

[Gonzolo]

This is just a test.

[krolik]

Hello everybody!
Do you know how to write in Latex a big square cap with underlying text like formulas in display math style?

[robert Ihnot]

\frac{1}{2}sqrt5+1

[Nenad]

1-(v^2 / c^2)

[chroot]

Tesing for 3.0.3 upgrade:

q^2

- Warren

[chroot]

Another 3.0.3 test

r^2

[chroot]

Another 3.0.3 test

m^2

[chroot]

Another 3.03 test

n^2

[Zorodius]

Just trying to figure out if there's anything in particular screwing things up:

blah blah blah xy=z blah blah

[chroot]

Test 3.03:

a^2 and a^3

- Warren

[chroot]

This is a test of the new latex hierarchy:

\vec v \cdot \vec u = 100

- Warren

[chroot]

This is a test of the new latex hierarchy:

\vec v \cdot \vec u = 20

[flexten]

Test


\mbox{\Huge \[
e^{jz} = cosz + jsinz\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\left ( {e^{jz} } \right)^\nu = e^{j\nu z} = cos\nu z + jsin\nu z
\]}


.

[Spinor]

Testing...


\newcommand{\uE}{\mathrm{e}}
\newcommand{\uI}{\mathrm{i}}
\uE^{\uI\pi}+1 = 0




\newcommand{\uE}{\mathrm{e}}
\newcommand{\uI}{\mathrm{i}}
\uE^{\uI{}x} = \cos{}x+\uI\sin{}x




:smile:

[Spinor]

Testing . . .

QED Lagrangian Density


\newcommand{\uI}{\mathrm{i}}
\newcommand{\commute}[2]{\left[{#1}\!
\mathrel{\vphantom{{#1}},\vphantom{{#2}}
\kern-\nulldelimiterspace}\!{#2}\right]}
\newcommand{\anticommute}[2]{\left\{{#1}\!
\mathrel{\vphantom{{#1}},\vphantom{{#2}}
\kern-\nulldelimiterspace}\!{#2}\right\}}

\begin{align*}
\mathcal{L}_{\text{QED}}(x) =& -\frac{1}{4}F_{\mu\nu}(x)F^{\mu\nu}(x)-\frac{1}{4}\left(\commute{\overline{\psi}(x)\gamma ^{\mu}}{\frac{\partial_\mu}{\uI}\psi(x)}-\commute{\frac{\partial_\mu}{\uI}\overline{\psi}(x )\gamma^{\mu}}{\psi(x)}\right) \\
&\quad{} -\frac{1}{2}m_{0}\commute{\overline{\psi}(x)}{\psi( x)}+\frac{1}{4}e_{0}\anticommute{\commute{\overlin e{\psi}(x)\gamma_{\mu}}{\psi(x)}}{A^{\mu}(x)}
\end{align*}


:zzz:

[h8ter]

test....
\sqrt{4}=2

[kioria]

Created in \LaTeX

[Vance]

Can you tell me how I can create a dvi file with images/pictures included ?
Thanks

[Tom McCurdy]

ax^n hello just testing

[robphy]

Can you tell me how I can create a dvi file with images/pictures included ?
Thanks

In LaTeX, you can use \includegraphics
see http://www-group.slac.stanford.edu/techpubs/help/figures/latex2efigs.html
and http://www.linmpi.mpg.de/~daly/latex/grf.htm

[h8ter]

test again...
\sqrt[3]{27}=3

[Vance]

In LaTeX, you can use \includegraphics
see http://www-group.slac.stanford.edu/techpubs/help/figures/latex2efigs.html
and http://www.linmpi.mpg.de/~daly/latex/grf.htm
:smile:

:cool:

[james11]

[ tex ] a^x_n [ /tex ]

[chroot]

james11,

Try it without the spaces. :smile:

- Warren

[poolwin2001]

x_1 *
x_2
x_3

[Emc2brain]

[ tex ] a^x_n [ /tex ]

[Emc2brain]

[tex]a^x_n[/tex ]

trial 2 (w/o spaces)

[Emc2brain]

Eke!! Oh Well..i'll Try This Later

[chroot]

Emc2brain,

You still have a space in your trial 2.

- Warren

[humanino]

That would be great if we could draw Feynman graphs ! Is it too difficult to handle ?

[cyber ghega]

A=x^_n
but
f(t)=alpha_n

[james11]

[ tex ]a^x_n[ /tex ]

[james11]

a^x_n

Trying without the spaces!

[james11]

test

P=2pieG/3*P^2*R^2

[james11]

test!

P= \frac{2 \p G}{3}p^2r^2

[james11]

Lets try again!

[tex]P= \frac{2 \p G}{3}p^2r^2[\tex]

[james11]

Lets try again!

P= \frac{2 \p G}{3}p^2r^2

[james11]

just testing!



P= \frac{2 {\p} G}{3}p^2r^2

[james11]

P= \frac{2\pG}{3}p^2r^2

[james11]

P= \frac{2{\pG}}{3}p^2r^2

[james11]

P= \frac{2{\p[G]}}{3}p^2r^2

P= \frac{2{\p[G]}}{3}p^2r^2

[james11]

P= \frac{2{\p}{G}{3}p^2r^2

[james11]

P= \frac{2\pieG}{3}p^2r^2

[james11]

P= \frac{\2pieG}{3}p^2r^2

2\pieG}{

\2pieG

[chroot]

james11,

Use \pi to represent \pi, rather than using "pie."

- Warren

[Janitor]

The quick brown fox jumped over the lazy dog who could not get images to upload properly.

[brianparks]

Testing...

\Vec{v}(x,y,z)=\frac{1}{x^2+y^2+z^2}(x\Vec{i}+y\Ve c{j}+z\Vec{k})

\frac{\partial v_x}{\partial x} =-\frac{2x^2}{(x^2+y^2+z^2)^2}+\frac{1}{x^2+y^2+z^2} = \frac{-2x^2}{r^4} + \frac{1}{r^2}


In the same way,

\frac{\partial v_y}{\partial y} =-\frac{2y^2}{r^4}+\frac{1}{r^2}

and

\frac{\partial v_z}{\partial z} =-\frac{2z^2}{r^4}+\frac{1}{r^2}

The divergence is

\mbox{Div}(\Vec{v})=\frac{\partial v_x}{\partial x} +\frac{\partial v_y}{\partial y} +\frac{\partial v_z}{\partial z}=

=\frac{-2x^2-2y^2-2z^2}{r^4}+\frac{3}{r^2}=\frac{-2r^2}{r^4}+\frac{3}{r^2}=\frac{1}{r^2}


It is the function
\Vec{v}(\Vec{r}) = \frac{\Vec{r}}{r^3}
whose divergence is zero everywhere except at the origin.

[chroot]

Test

\vec F = m \vec a

[Orion1]

test:
F = ma

Does anyone know of other math or physics forums similar to this forum that also uses LaTex?
Where can I purchase a comprehensive commercial LaTex CD for installing and using LaTex on a home PC?

[TALewis]

TeX and LaTeX are free software. I think what you probably want is MikTeX:

http://www.miktex.org/

Others, correct me if I'm wrong; I don't have any experience with TeX on Windows (I use Debian GNU/Linux).

[robphy]

I use MikTeX, which works well for me.

This, however, looks interesting: http://www.tug.org/texlive/

[Orion1]

I have MikTex v2.4 installed, and have read the documentation.

On Windows it appears to use a DOS based command format to compile various formats for various applications.

Can anyone demonstrate how to compile my first equasion using Windows MikTex similar to how Physics Forums does this?

[JohnDubYa]

Just testing:

f(x) = \frac{ \int_{-\infty}^\infty \sin(x^2)\,dx}{\Gamma(x)}

[Orion1]

I figured out how to compile equations into a DVI file.

I found the following command:
\includegraphics{filename}

Anyone know of a convertor program to convert DVI format to PNG graphics format?

There is a program called 'dvi2png', however I could not locate a download or determine the capabilities of this program.

There is a program located in the miktex bin file called 'dvipng.exe' that can convert .dvi to .png format, however despite the comprehensiveness of this program, failed to properly convert a miktex generated .dvi file. The resulting output .pdf file was not legible. Therefore, 'dvipng.exe' does not support miktex .dvi.

Reference:
http://css.ait.iastate.edu/WP/Latex/Thesis/HTML/Isuthesis/node47.html#math

[TALewis]

To use \includegraphics, you probably need to put \usepackage{graphicx} in the preamble of your LaTeX document, right after the \documentclass line.

If you're compiling your documents with the latex command, you need to convert your pictures to encapsulated Postscript (eps) before including them. If you're using the pdflatex command, I think you should be able to use JPEGs and PNGs directly.

[Orion1]

To use \includegraphics, you probably need to put \usepackage{graphicx} in the preamble of your LaTeX document, right after the \documentclass line.

If you're compiling your documents with the latex command, you need to convert your pictures to encapsulated Postscript (eps) before including them. If you're using the pdflatex command, I think you should be able to use JPEGs and PNGs directly.


\documentclass{}
\usepackage{graphicx}
\begin{document}
\includegraphics{filename}
\end{document}


This is absolutely correct. The MikTex DOS compiler will only accept the \usepackage{graphicx} command immediately after the \documentclass command.

I was able to include .jpg, .bmp and .png graphics directly using miktex with a .bb (bounding box) file, however the 'ebb.exe' file used to create .bb files produces incorrect file dimensions which results in the miktex equations 'eating into' the graphics box. Also, the 'ebb.exe' file does not support .bmp, however I was still able to manually create a .bb .bmp file. Note that some .bmp filters are not supported by miktex .dvi format, I suspect the same may be true for .jpg and .png also.

I was able to correct this error manually using a photoviewer that displays the correct graphics dimensions and manually editing the .bb file with the correct numbers.

'bmeps.exe' is the program that converts .jpg and .png pictures to .eps format.

'bmeps.exe' does create a .bb file with the correct graphics dimensions. However, 'bmeps.exe' does not support .bmp format.

'bmeps.exe' is able to convert .tif files into .eps format, however produces a warning of 'unknown field tag 34337 (0*8649) ignored', however still worked.

I noticed the .ps.gz and .eps examples listed in the miktex graphics folder.

I note that the .ps.gz format does appear to be impressive.

Is there any way to override the equation numbering sequencer to produce custom generated equation numbers?

Reference:
http://bmeps.sourceforge.net/faq.html#baswhich

[Orion1]

There is a program located in the miktex bin file called 'dvipng.exe' that can convert .dvi to .png format.

I have tested this program and has passed testing, very impressive program, works fine.

[TALewis]

This PDF might have a solution to overriding the default equation numbering:

http://www.ee.mu.oz.au/staff/cantoni/docs/amsldoc.pdf

Section 3.1 says that with the amsmath package (\usepackage{amsmath}), you can provide your own equation number or symbol with the \tag{label} command.

[gazzo]

{\lfloor}\int_{4}^{4+4} cosh (\theta + \theta + \theta){\rfloor}

[KaneOris]

Just seeing if im doing it right...

E = 1/2mv^2

[Orion1]

This PDF might have a solution to overriding the default equation numbering:

http://www.ee.mu.oz.au/staff/cantoni/docs/amsldoc.pdf

Section 3.1 says that with the amsmath package (\usepackage{amsmath}), you can provide your own equation number or symbol with the \tag{label} command.
This is a solution to overriding the default equation numbering.

However, the \tag{label} command must be declared after the \begin{equation*} command within the internal equation environment. To my knowledge, the miktex compiler will not accept this command outside an equation environment. There may be other internal environments that the \tag{label} command may be accepted, this requires further research discovery.

The correct source code is:

\documentclass{article}
\usepackage{amsmath}
\begin{document}

\begin{equation*}
\tag{label}
E_1 = mc^2
\end{equation*}

\end{document}

E_1 = mc^2 \; \; \; \; \; \; \tag{label}

KaneOris, your source code is:

[!tex] E = 1/2mv^2 [!/tex]

However, this can be interpreted as a reciprocal!:
E = \frac{1}{2mv^2}

It also helps to place a subscript tag on the E for mathematical proof and tracking purposes because several different types of energies can be involved, E_k for Kinetic Energy or some other subscript tag.

Try using the fraction command \frac{numerator}{denominator}:

[!tex] E_k = \frac{mv^2}{2} [!/tex]
[!tex] E_k = \frac{1}{2}mv^2 [!/tex]

E_k = \frac{mv^2}{2}
E_k = \frac{1}{2}mv^2

Reference:
http://www.emerson.emory.edu/services/latex/latex_toc.html

[humanino]

Quaternions ?
\mathbb{H}
\mathbb{R}
ok, never mind... :smile:

[Tom McCurdy]

\frac{\pi}{{3^{i\pi}}}=\gamma

[lanjarote]

:cry:
I can't see the tex code when I click on the examples

[lanjarote]

Excuse me , just for fun


\begin{align*}
\nabla \times \vec E = -\frac{\partial \vec B}{\partial t}
\\
\nabla \times \vec H = \vec J +\frac{\partial \vec D}{\partial t}
\end{align*}

[chroot]

lanjarote,

You might need to set your popup-blocker software to allow pf to show popups.

- Warren

[Orion1]

Here is the complete help command list for the 'dvipng.exe' file. On Windows, some of the first commands displayed are 'cut off' by the DOS window. This is the complete list displayed by the 'dvipng.exe -help' command.

dvipng.exe help data:



dvipng.exe -help

Usage: %s [OPTION]... FILENAME[.dvi]
Options are chosen to be similar to dvips' options where possible:
-D # Output resolution
-l # Last page to be output
--mode s MetaFont mode (default 'cx')
-M* Don't make PK fonts
-o f Output file, '%%d' is pagenumber
-O c Image offset
-p # First page to be output
-pp #,#.. Page list to be output
-q* Quiet operation
-r* Reverse order of pages
-T c Image size (also accepts '-T bbox' and '-T tight')
-v* Verbose operation
-x # Override dvi magnification
- Interactive query of options

These do not correspond to dvips options:
-bd # Transparent border width in dots
-bdpi # Set the base (Metafont) resolution
-bg s Background color (TeX-style color)
--depth* Output the image depth on stdout
--dvinum* Use TeX page numbers in output filenames
-fg s Foreground color (TeX-style color)
--follow* Follow mode
--height* Output the image height on stdout
--truecolor* Truecolor output
-Q # Quality (T1lib and PK subsampling)
-z # PNG compression level

# = number f = file s = string * = suffix, '0' to turn off

c = comma-separated dimension pair (e.g., 3.2in,-32.1cm)



Does anyone here have a hyperlink to a comprehensive file that has descriptions for each of these commands and some sourcecode examples?

[Machinus]

Sorry for the easy question, but I can't find how to make an approximation symbol (the squiggly equals sign).

[arildno]

Try this one \approx

[chroot]

Machinus,

Look at the pdf file: http://www.physicsforums.com/misc/howtolatex.pdf

- Warren

[Machinus]

Yes, I d/led that pdf but I was having some trouble with acrobat. I think it is better now though. Thanks.

[Tom McCurdy]

test

a= \fraq{b}{x}

[Tom McCurdy]

\frac{1}{5+2}

[Tom McCurdy]

Vosin45-gt=0

Vosin45=gt

t= \frac{Vosin45}{g}

since you need to muliply by 2
t= \frac {\frac{2\frac{2\sqrt{2}Vo}{2}\frac{2\sqrt{2}Vo}{2} \frac{2\sqrt{2}Vo}{2}\sqrt{2}Vo}{2}\frac{2\sqrt{2} Vo}{2}\frac{2\sqrt{2}Vo}{2}\frac{2\sqrt{2}Vo}{2} }{g}

t= \frac{Vo\sqrt{2}}{g}

[chroot]

From now on, please use the "Post Preview" feature to test your LaTeX, rather than wasting server space by posting it here. Please post any additional questions about our LaTeX system to the Feedback forum. Please post any additional questions about LaTeX itself to the General Technology Forum.

- Warren

[thegame]

testing...

\begin{array}{r l r l}
u &= \ln x \quad & dv &= x\,dx \\
du &= \frac{1}{x}\,dx & v &= \frac{1}{2} x^2
\end{array}




[tex]
\begin{array}{r l r l}
sqrt{a_A^2+b_B^2}
\end{array}
[\tex]

[BLUE_CHIP]

\ddot{x}=-\omega^{2}{x}
T=\frac{2\pi}{\omega}
\ddot{x}
T
\omega
I=\frac{1}{2}MR^{2}
I
M
R
I=\frac{1}{2}MR^{2}+4mr^{2}
m
r
T_{v}=2\pi\sqrt{\frac{k}{m}}
T_{r}=2\pi\sqrt{\frac{I}{c}}
T
k
c

[RadiationX]

x^2\sqrt{x}\int

[BLUE_CHIP]

T_{r}=10.8-8.1
T_{r}=2.7
T_{r}
T_{v}
T_{r}=T_{v}
T_{r}^{2}\propto{I}

[jasonc65]

\langle p_1 | p_2 \rangle = \langle 0 | a(p_1) a^{\dagger} (p_2) | 0 \rangle = \delta (p_1 - p_2)
\langle x^1 | x^2 \rangle = \langle 0 | \varphi (x^1) \varphi ^{\dagger} (x^2) | 0 \rangle = \delta (x^1 - x^2)
T^{\mu \nu} = g^{\nu \sigma} {T^{\mu}}_{\sigma}

[rsixtyone]

This is just a test to see if it works.


A=[A\angle\theta_{A}]

[phreak]

\sum_{n=1}^\infty \frac{1}{n}-\frac{1}{n+1}

[Raza]

2 Li_(_s_) + 2 H_2O_(_l_) \xrightarrow~2 LiOH_(_a_q_) + H_2_(_g_)
2 K_(_s_) + 2 H_2O_(_l_) \xrightarrow~2 KOH_(_a_q_) + H_2_(_g_)
Ca_(_s_) + 2 H_2O_(_l_) \xrightarrow~Ca(OH)_2_(_s_) + H_2_(_g_)
Na_(_s_) + 2 H_2O_(_l_) \xrightarrow~2 NaOH_(_a_q_) + H_2_(_g_)
Mg_(_s_) + 2 H_2O_(_g_) \xrightarrow~Mg(OH)_2_(_s_) + H_2_(_g_)
2 Al_(_s_) + 6 H_2O_(_g_) \xrightarrow~2 Al(OH)_3_(_s_) + 3 H_2_(_g_)
Fe_(_s_) + CuSO_4_(_a_q_) \xrightarrow~FeSO_4_(_a_q_) + Cu_(_s_)\xleftarrow~

[rachmaninoff]

\Gamma(z)=\int^{\infty}_0t^{z-1}e^{-t}dt

[Kea]

Let me try

\xymatrix @=15mm {T \hspace{2mm} \ar@{>->}[r]_{f}
\ar[d]^{!} & S \ar[d]_{\chi} \\ \{ \ast \} \ar[r]^{t} & \{ 0,1 \}
}

Oops. Can we have the xy package at some future date?

Cheers
Kea

[rachmaninoff]

Test:

(AB)C=([a_{ij}]\times[b_{ij}])\times[c_{ij}]=[\sum_{k=1}^{n}a_{ik}b_{kj}]\times[c_{ij}]=[\sum_{l=1}^{p}(\sum_{k=1}^{n}a_{ik}b_{kl})c_{lj}]=[\sum_{l=1}^{p}(\sum_{k=1}^{n}a_{ik}b_{kl}c_{lj})]
=[\sum_{k=1}^{n}(\sum_{l=1}^{p}a_{ik}b_{kl}c_{lj})]=[\sum_{k=1}^{n}a_{ik}(\sum_{l=1}^{p}b_{kl}c_{lj})]=[a_{ik}]\times[\sum_{l=1}^{p}b_{kl}c_{lj}]=[a_{ik}]\times([b_{ik}]\times[c_{ik}])=A(BC)

[marcus]

a test
\not G

how do you put a slash thru a letter? anybody?
I just want a distinguished G, slash isnt so good, so I will try some others

\widehat{G}

\tilde{G}

\overline{G}

\mathbb{G}

[marcus]

I see Ambitwistor has made some slashes but it seems very involved so maybe lets forget about it and try something else

\def\pds{\kern+0.1em /\kern-0.55em \partial}
\def\lts#1{\kern+0.1em /\kern-0.65em #1}
{\cal L}_R = \sum_{i=1}^G
\bar{E}^i_R(i\pds
- g_1Y_E \lts{B})E^i_R +
\bar{D}^i_R(i\lts{D}
- g_1Y_D \lts{B})D^i_R +
\bar{U}^i_R(i\lts{D}
- g_1Y_U \lts{B})U^i_R)


There's actually a whole 'slashed' package for this...

I want a distinguished G symbol. I'll try some more alternatives

\mathcal{G}

\mathbb{G}

\mathbf{G}

\mathsf{G}

[JesseM]

How come I when I try to edit my code, the changes don't show up in the post? In this post (http://physicsforums.com/showthread.php?p=425319) I wanted to change that \frac{dx}{d\tau} in the second line of the Brian Greene quote into dx/d\tau, so I changed the code in the edit window, but it still shows up like the first version on my screen.

edit: I checked back a few hours later, and now the edited version appears onscreen. But then I made another edit, and again the graphics were not updated, even if I hit "refresh" or quit my browser and returned to the page. Is there a delay in how quickly LaTeX graphics are updated or something?

edit 2: never mind, I figured out that if I clear my browser's disk cache before hitting "refresh", the graphic gets updated correctly, so that must have been the problem.

[clive]

a^n
:cry:

I would like to write equations too......am I missing something?

[chroot]

clive:

Be careful. You need a a forward slash, not a backslash, in your closing [ tex ] tags.

Type this, but omit the spaces:

[ tex ] a^n [ /tex ]

- Warren

[Gokul43201]

I've wondered about slashes too...especially for symbols representing "not equal" (which can be got around), "not congruent" (need a slash through \equiv), "not divisible by" (or "does not divide" which is a slash across a vertical line).

Do these symbols exist (haven't seen them in any library, but I haven't looked carefully) or does it take some trick to generate them ?

[Gokul43201]

\def\lts#1{\kern+0.1em /\kern-0.65em #1}
\lts{\equiv}~~~ \lts{=}~~~\lts{~|}~~~\lts{\vert}

Hmmm...That didn't work too well. Can I change the position of the slash ?

[clive]

Thanks chroot,

\bigtriangledown ^2 \phi=\sqrt{t^2+1}

What a wonderful world...... :approve:

[Gary King]

This is very cool :smile: How can I put this new addition on my vBulletin forums as well?

Thanks in advance! :smile:

[Janitor]

Let's see...

\pi * e \oint D^4 f \bigwedge F(\overline {\tau}) \approx \underbar {X}, whence

G_i \oplus G_j = \emptyset \bigcap \ker(\alpha) \longleftrightarrow \sigma ^i^j \in SU(4).

[HawkeyeCoug]

I am trying to do a formula sheet for statistical mechanics. Our professor uses a dashed-d to represent a perfect differential, which I have had trouble making. I did overwrite a d with a ^{\smallsetminus}, but the construct I was using (copied from a website) caused problems. Anyone have a non-problematic overtype?

Also, his notation is to use a line at the end of a derivative with subscripts representing the variables held constant. I can't get |, \vert, \right|, or \mid to work correctly. Has anyone solved this?

Thanks so much for your help in advance.

[The Divine Zephyr]

\int_{1}^{\sqrt[3]{3}}z^2dz \times \cos{\frac{3\pi}{9}}=\ln{\sqrt[3]{e}}

Integral z squared dz
from 1 to the cube root of 3
times the cosine of 3 pi over 9
equals the log of the cubes root of e


Whoever thought that up was a really clever math poet ;)

[ReyChiquito]

quick q.

instead of having something like this

\int_{\|\vec{X}-\vec{Y}\|=\epsilon}

can i make the \|\vec{X}-\vec{Y}\|=\epsilon} right beneath the \int sign???

the same here, instead of

\nabla_X

i want the X beneath the nabla sign

thx :)

[z-component]

This is very cool :smile: How can I put this new addition on my vBulletin forums as well?

Thanks in advance! :smile:Gary, this addition is not a standard addon for vBulletin. The administrators have added the LaTeX system themselves. More information on LaTeX, http://www.latex-project.org.

[The Divine Zephyr]

\int \frac{3}{4+3x^2}dx=\frac{1}{2}\sqrt{3}\arctan(\fra c{x\sqrt{3}}{2})+C

[Tom Mattson]

Question:

Is it possible to make Venn Diagrams with LaTeX?

[Janus]

Question:

Is it possible to make Venn Diagrams with LaTeX?
Yep, you can use the picture enviroment, like thus:


\begin{picture}(400,400)

\put(80,80){\circle{40}}
\put(100,80){\circle{40}}
\put(90,100){\circle{40}}
\put(65,70){A}
\put(105,70){B}
\put(85,105){C}
\end{picture}


Though the "oval" might be more versatile:



\begin{picture}(500,500)

\put(290,260){\oval(100,100)}
\put(330,280){\oval(100,100)}
\put(280,310){\oval(100,100)}
\put(260,240){A}
\put(350,240){B}
\put(260,330){C}
\end{picture}

[ReyChiquito]

\int \atop \|\vec{X}-\vec{Y}\|=\epsilon

\nabla \atop X

there has to be a better way

[arildno]

\int \atop \|\vec{X}-\vec{Y}\|=\epsilon

\nabla \atop X

there has to be a better way
You have the "stackrel" option
\stackrel{\nabla}{X}

[ReyChiquito]

thx mate... im still not convinced though... ill get it right someday :)

[Norman]

anyone know how to do a contraction symbol from QFT (as in Wicks Theorem)? It is basically a square brace on top of the charecters connecting 2 charecters that are not necesarily next to each other?

[ReyChiquito]

\iint\limits_\Omega

\int\limits_{\|\vec{X}-\vec{Y}\|=\epsilon}

\mathop{\nabla}\limits_X

all right!!!! :approve:

[gnome]

how do I set up a case-by-case function definition, i.e.
......{ a if y<1
x = { b if 1&le;y<2
......{ c otherwise

The \cases command doesn't seem to work here.

[jcsd]

x =\left\{\begin{array}{ccc}a&\mbox{ if }
x<1\\b &\mbox{ if }1\leq y <2 \\c&\mbox{ otherwise}\end{array}\right

[gnome]

Thanks. Any way to get the "ifs" aligned?

edit: nm; I seem to have gotten it.

[jcsd]

Yes, I couldn't work it out at first (for info here it is:)
x =\left\{\begin{array}{lll}a&\mbox{ if }
x<1\\b&\mbox{ if }1\leq y <2 \\c&\mbox{ otherwise }\end{array}\right

[houserichichi]

This is copied (and edited) from TeXaide (which works exactly like Microsoft Equation Editor)


x\sum\limits_{i = 0}^\infty {\left( {\begin{array}{*{20}c}
a & b & c \\
{a \times a} & {b \otimes b} & {c\langle c^c \rangle } \\
{a_{\aleph _0 } } & {\wp \left( b \right)} & {\bigcap\limits_c {\Re ^c } } \\
\end{array}} \right)} \frac{\partial }{{\partial x}}\mathop \oplus \limits_x \bigcup + 6\mathop{\left){\vphantom{1{12}}}\right.
\!\!\!\!\overline{\,\,\,\vphantom 1{{12}}}}
\limits^{\displaystyle\hfill\,\,\, 2}
\

Can't seem to figure out where that last "]" comes from at the end, but alas - it worked like a charm. Shame that all means nothing!

[The Divine Zephyr]

\textrm{pwnz0rz}= \frac {-1337 \textrm{search engine}\pm \sqrt{(1337 \textrm{search engine})^2-4(1)(\textrm{gmail})}}{2}


Hmm, so you can mix words with numbers and pretty print in latex with \textrm.


...dont ask

[Davorak]

Testing

\begin{array}{ccccc}1&2\\1&2\\3&2\\2&4\\2&5\\\end{array}


\begin{array}{|c|c|c|c|c|}1&2\\1&2\\3&2\\2&4\\2&5\\\end{array}


\begin{array}{|c|c|c|c|c|}\hline1&2\\\hline\hline1&2\\\hline\hline3&2\\\hline\
\hline2&4\\\hline\hline2&5\\\hline\end{array}

[Davorak]

FBox[x_List] := StringJoin@ToString @@@ Flatten[
{
"\begin{array}\n",
"{", "|", Table["
c|", {n, 1, Length[x]}], "}", "\hline", Table[{Table[{ToString[x[[n1,
n2]]], If[n2 ≠ Dimensions[
x][[2]], "&", ""]}, {n2, 1, Dimensions[x][[2]]}], "\\\\", "\hline
"}, {n1, 1, Dimensions[x][[1]]}], "\n \end{array}"
}
]

FBox[{{1, 2}, {1, 2}, {3, 2}, {2, 4}, {2, 5}}]:

\begin{array}
{|c|c|c|c|c|}\hline1&2\\\hline1&2\\\hline3&2\\\hline2&4\\\hline2&5\\\hline
\end{array}

[Davorak]

F2[x_List] := StringJoin @@ ToString @@@ Flatten[
{
"\begin{array}",
"{", Table["c", {n, 1, Length[x]}], "}",
Table[
{Table[{ToString[x[[n1, n2]]], If[n2
≠ Dimensions[x][[2]], "&", ""]}, {n2, 1, Dimensions[x][[2]]}],
"\\\\"},
{n1, 1, Dimensions[x][[1]]}
],
"\end{array}"
}
]
F2[{{1, 2}, {1, 2}, {3, 2}, {2, 4}, {2, 5}}]:

\begin{array}{ccccc}1&2\\1&2\\3&2\\2&4\\2&5\\\end{array}

[Davorak]

The above code is for mathematica

[gnome]

Why doesn't this work? All I'm trying to do is get 2 left-aligned columns. First I was trying to do it using {array}{cc} formatting similar to the conditional equations up above. That didn't work so I tried this {equation*} layout which is also going haywire. When I was testing a little while ago, I'm pretty sure the same code (but with a smaller amount of content) worked almost correctly; only the first column was right- instead of left-aligned. Now it doesn't work at all.


To accomplish this, the formula will be built up from 3 types of variables, specifically:
\begin{equation*}\begin{split}\mbox{Variable} \quad &\mbox{Meaning}\\
Q[i,k] \quad &\mbox{At time i, M is in state q_k}\\
H[i,j] \quad &\mbox{At time i, the read-write head}\\
&\mbox{ is scanning tape square j}\\
S[i,j,k] \quad &\mbox{At time i, the contents of}\\
&\mbox{tape square j is symbol s_k}\end{split}\end{equation*}


OK this is really crazy; sometimes this works, and sometimes it doesn't, yet it's the same code structure as above:
\begin{equation*}\begin{split}\mbox{Variable} \quad &\mbox{Meaning}\\
Q[i,k] \quad &\mbox{At time i the read-write head blah blah blah}\\
&\mbox{blah blah blah}\\
H[i,j] \quad &\mbox{At time i}\end{split}\end{equation*}

[jcsd]

try {ll} instead {cc}, (that's how I managed to get the conditonal equation aligned).

[gnome]

Nope. It seems to make no difference whether I format it using {array}{cc} or {array}{11} or {equation*}{split}, \mbox{...} or \text{...]. For example:

To accomplish this, the formula will be built up from 3 types of variables, specifically:
\begin{array}{11}\mbox{Variable} & \mbox{Meaning}\\
Q[i,k] &\mbox{At time i, M is in state q_k}\\
H[i,j] &\mbox{At time i, the read-write head}\\
&\mbox{ is scanning tape square j}\\
S[i,j,k] &\mbox{At time i, the contents of}\\
&\mbox{tape square j is symbol s_k}\end{array}

[jcsd]

It's not a 1 it's an 'l' and you need one for each row:

edited to add: hmm I can't see anything wrong with this perhaps it's just too big.

[gnome]

(I think it's just any series of characters {xxx}, {111}, {iii}, whatever, not some particular one; and isn't it one for each COLUMN, not row?)


Edited to remove my witty(?) remark about the part of your post that you deleted. :wink:

[jcsd]

No, it's one for each row and 'c' is for centre 'l' is for left I guess.

edited to add: actually you're right but {ll}, {cc} or {rr} is the justifcation.

[jcsd]

This one works and it's simlair:

\begin{array}{lr}\mbox{yoink}&\mbox{double-yoink}\\G[i,j]&\mbox{yes}\\H[k,l] &\mbox{no}\\&\mbox{what?}\end{array}

I reckon then it must be thta it's just too big as there's a limit to the size of the code.

[gnome]

Good find!!

That should be helpful.

[gnome]

That's it!!!!!!!!

\begin{array}{ll}\mbox{Variable} & \mbox{Meaning}\\
Q[i,k] &\mbox{At time i, M is in state}\, q_k\\
H[i,j] &\mbox{At time i, the read-write head}\\
&\mbox{is scanning tape square j}\\
S[i,j,k] &\mbox{At time i, the contents of}\\
&\mbox{tape square j is symbol}\, s_k\end{array}


\mbox{testing another sub_sc_rip_t}

Building on jcsd's find:
the charaters in the brackets after {array} must be
{lll} (that lower-case L's) to left-align
{rrr} to right-align
{"any characters"} to center the text in each column (one char for each column)

Also: apparently subscript like q_k can't be used in \mbox in an array, although it can be used in \mbox when it's not part of an array.

Now I can get back to my "real" post.

Thanks.
:smile: :smile: :smile:

[Norman]

Wick Contraction-

http://www.fzu.cz/~kolorenc/tex.php

This website has 2 or 3 possible implementations for Wick Contractions in QFT. I have not tried any, but will let you know how they work!

[ramollari]

Hi everybody,
Does anyone know how do I write a vector quantity, such as an F with an arrow up? I'm not so skilled in Latex.
Thanks

[jcsd]

\vec{F}

\vec{F}

[ramollari]

OK, let me try once.


\sum\vec{F}_e_x_t = M\vec{a}_c_m

[ramollari]

Thanks jcsd!

[Gary King]

How do I create the 'inverse' symbol?

[z-component]

Like cos\theta^{-1}?

[jcsd]

inverse is just ^{-1}, so the (muplicative) inverse of a is a^{-1}, for an inverse function like cos you want \cos^{-1}\theta

[The Divine Zephyr]

\begin{array}P=A(1+\frac{r}{100})^n
\\
\sqrt[n]{\frac{P}{A}}=\frac{r+100}{100}
\\
r=100\sqrt[n]{\frac{P}{A}}-100\end{array}

[Norman]

Wick Contraction-

http://www.fzu.cz/~kolorenc/tex.php

This website has 2 or 3 possible implementations for Wick Contractions in QFT. I have not tried any, but will let you know how they work!

The simple_wick.tex file works very well. I could not get the other one to work. I also did not have any of the problems the author gives for simple_wick.tex.

Cheers

[Orion1]

expired post...

[Davorak]

I have a question
How much Tex is to much tex?


\begin{picture}(500,500)(0,0)

\put(200.,89.3817){2}
\put(300.,89.3817){3}
\put(400.,89.3817){4}
\put(500.,89.3817){5}
\put(600.,89.3817){6}
\put(93.4375,200.){2}
\put(93.4375,300.){3}
\put(93.4375,400.){4}
\put(93.4375,500.){5}
\put(93.4375,600.){6}

\put(100,100){\circle{3}}
\put(200,200){\circle{3}}
\put(300,300){\circle{3}}
\put(400,400){\circle{3}}
\put(500,500){\circle{3}}
\put(600,600){\circle{3}}

\put(200.,100.){\line(0.,1.){5.30917}}
\put(300.,100.){\line(0.,1.){5.30917}}
\put(400.,100.){\line(0.,1.){5.30917}}
\put(500.,100.){\line(0.,1.){5.30917}}
\put(600.,100.){\line(0.,1.){5.30917}}
\put(120.,100.){\line(0.,1.){3.1855}}
\put(140.,100.){\line(0.,1.){3.1855}}
\put(160.,100.){\line(0.,1.){3.1855}}
\put(180.,100.){\line(0.,1.){3.1855}}
\put(220.,100.){\line(0.,1.){3.1855}}
\put(240.,100.){\line(0.,1.){3.1855}}
\put(260.,100.){\line(0.,1.){3.1855}}
\put(280.,100.){\line(0.,1.){3.1855}}
\put(320.,100.){\line(0.,1.){3.1855}}
\put(340.,100.){\line(0.,1.){3.1855}}
\put(360.,100.){\line(0.,1.){3.1855}}
\put(380.,100.){\line(0.,1.){3.1855}}
\put(420.,100.){\line(0.,1.){3.1855}}
\put(440.,100.){\line(0.,1.){3.1855}}
\put(460.,100.){\line(0.,1.){3.1855}}
\put(480.,100.){\line(0.,1.){3.1855}}
\put(520.,100.){\line(0.,1.){3.1855}}
\put(540.,100.){\line(0.,1.){3.1855}}
\put(560.,100.){\line(0.,1.){3.1855}}
\put(580.,100.){\line(0.,1.){3.1855}}
\put(87.5,100.){\line(1.,0.){525.}}
\put(100.,200.){\line(1.,0.){3.28125}}
\put(100.,300.){\line(1.,0.){3.28125}}
\put(100.,400.){\line(1.,0.){3.28125}}
\put(100.,500.){\line(1.,0.){3.28125}}
\put(100.,600.){\line(1.,0.){3.28125}}
\put(100.,120.){\line(1.,0.){1.96875}}
\put(100.,140.){\line(1.,0.){1.96875}}
\put(100.,160.){\line(1.,0.){1.96875}}
\put(100.,180.){\line(1.,0.){1.96875}}
\put(100.,220.){\line(1.,0.){1.96875}}
\put(100.,240.){\line(1.,0.){1.96875}}
\put(100.,260.){\line(1.,0.){1.96875}}
\put(100.,280.){\line(1.,0.){1.96875}}
\put(100.,320.){\line(1.,0.){1.96875}}
\put(100.,340.){\line(1.,0.){1.96875}}
\put(100.,360.){\line(1.,0.){1.96875}}
\put(100.,380.){\line(1.,0.){1.96875}}
\put(100.,420.){\line(1.,0.){1.96875}}
\put(100.,440.){\line(1.,0.){1.96875}}
\put(100.,460.){\line(1.,0.){1.96875}}
\put(100.,480.){\line(1.,0.){1.96875}}
\put(100.,520.){\line(1.,0.){1.96875}}
\put(100.,540.){\line(1.,0.){1.96875}}
\put(100.,560.){\line(1.,0.){1.96875}}
\put(100.,580.){\line(1.,0.){1.96875}}
\put(100.,87.5){\line(0.,1.){525.}}

\end{picture}

[Davorak]

That was not too much tex.

Limit is 20000 characters, interesting.

5 sin(2x) +5 x 0 to 10

\begin{picture}(200,200)(0,0)

\put(40.,-4.24641){2.}
\put(80.,-4.24641){4.}
\put(120.,-4.24641){6.}
\put(160.,-4.24641){8.}
\put(200.,-4.24641){10.}
\put(-2.625,40.){0.2}
\put(-2.625,80.){0.4}
\put(-2.625,120.){0.6}
\put(-2.625,160.){0.8}
\put(-2.625,200.){1.}

\put(40.,0.){\line(0.,1.){2.12321}}
\put(80.,0.){\line(0.,1.){2.12321}}
\put(120.,0.){\line(0.,1.){2.12321}}
\put(160.,0.){\line(0.,1.){2.12321}}
\put(200.,0.){\line(0.,1.){2.12321}}
\put(10.,0.){\line(0.,1.){1.27392}}
\put(20.,0.){\line(0.,1.){1.27392}}
\put(30.,0.){\line(0.,1.){1.27392}}
\put(50.,0.){\line(0.,1.){1.27392}}
\put(60.,0.){\line(0.,1.){1.27392}}
\put(70.,0.){\line(0.,1.){1.27392}}
\put(90.,0.){\line(0.,1.){1.27392}}
\put(100.,0.){\line(0.,1.){1.27392}}
\put(110.,0.){\line(0.,1.){1.27392}}
\put(130.,0.){\line(0.,1.){1.27392}}
\put(140.,0.){\line(0.,1.){1.27392}}
\put(150.,0.){\line(0.,1.){1.27392}}
\put(170.,0.){\line(0.,1.){1.27392}}
\put(180.,0.){\line(0.,1.){1.27392}}
\put(190.,0.){\line(0.,1.){1.27392}}
\put(-3.,0.){\line(1.,0.){2100.}}
\put(0.,40.){\line(1.,0.){13.125}}
\put(0.,80.){\line(1.,0.){13.125}}
\put(0.,120.){\line(1.,0.){13.125}}
\put(0.,160.){\line(1.,0.){13.125}}
\put(0.,200.){\line(1.,0.){13.125}}
\put(0.,10.){\line(1.,0.){7.875}}
\put(0.,20.){\line(1.,0.){7.875}}
\put(0.,30.){\line(1.,0.){7.875}}
\put(0.,50.){\line(1.,0.){7.875}}
\put(0.,60.){\line(1.,0.){7.875}}
\put(0.,70.){\line(1.,0.){7.875}}
\put(0.,90.){\line(1.,0.){7.875}}
\put(0.,100.){\line(1.,0.){7.875}}
\put(0.,110.){\line(1.,0.){7.875}}
\put(0.,130.){\line(1.,0.){7.875}}
\put(0.,140.){\line(1.,0.){7.875}}
\put(0.,150.){\line(1.,0.){7.875}}
\put(0.,170.){\line(1.,0.){7.875}}
\put(0.,180.){\line(1.,0.){7.875}}
\put(0.,190.){\line(1.,0.){7.875}}
\put(0.,-4.99793){\line(0.,1.){209.954}}

\put(2.,154.402){\circle{3}}
\put(4.,136.648){\circle{3}}
\put(6.,117.433){\circle{3}}
\put(8.,97.5225){\circle{3}}
\put(10.,77.711){\circle{3}}
\put(12.,58.7882){\circle{3}}
\put(14.,41.5083){\circle{3}}
\put(16.,26.5603){\circle{3}}
\put(18.,14.5401){\circle{3}}
\put(20.,5.92694){\circle{3}}
\put(22.,1.06418){\circle{3}}
\put(24.,0.145665){\circle{3}}
\put(26.,3.20803){\circle{3}}
\put(28.,10.1292){\circle{3}}
\put(30.,20.6332){\circle{3}}
\put(32.,34.3013){\circle{3}}
\put(34.,50.5887){\circle{3}}
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hmm can not put things too close together.

I am having trouble using negative number. I should just displace everything.
What is a better way to do these graphs, so they take fewer commands?

[Davorak]

10 BesselJ[0,z]



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10 BesselJ[1,z]


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\end{picture}

[JesseM]

Why does the first one work while the second one is messed up?

\frac{2AB}{t^{'}_A - t_A} = c

\frac{2AB}{{t^'}_A - t_A} = c

[anomoly]

How would i go about getting the Amp to space a few characters away from the t(not) symbol?
I = \sqrt {[\frac {22.6T + 0.088t -490.58} {5 * 10^{-5} * t}] * t_{0}} Amp

[dextercioby]

Why does the first one work while the second one is messed up?

\frac{2AB}{t^{'}_A - t_A} = c

\frac{2AB}{{t^'}_A - t_A} = c


Because you screwed up the code.Specifically,because your first code differs from the second through misplaced "{" which changes the way the "\frac" would work...

Daniel.

[SergejVictorov]

\lim_{\substack{x\rightarrow 0\\}} f(x,y)

[Tom Mattson]

I've got a question: Is it possible to make Feynman diagrams with our LaTeX hack? If not, would it be terribly difficult to create?

Thanks,

[The Divine Zephyr]

A=60+(S+\Delta P) \times \frac{L_2}{L_1}

[gnome]

How would i go about getting the Amp to space a few characters away from the t(not) symbol?
I = \sqrt {[\frac {22.6T + 0.088t -490.58} {5 * 10^{-5} * t}] * t_{0}} Amp
I = \sqrt {[\frac {22.6T + 0.088t -490.58} {5 * 10^{-5} * t}] * t_{0}} \quad Amp

If you want it still farther away, use \qquad instead of \quad.
If you want it closer, use \;

[hellfire]

I posted this today in the cosmology forum:

dt = \frac{da}{H_0 \left(\frac{\Omega_{m,0}}{a} + a^2 \Omega_{\Lambda,0}\right)^{\frac{1}{2}}}

How can I made that the first "Omega" and "a" have the same size than the second?

[dextercioby]

U can't.Note that the whole fraction must be on equal footing a^{2}Omega...That means that the denominator & the numerator would be smaller than they'd be without the fraction line.

Daniel.

[robphy]

Use \displaystyle

dt = \frac{da}{H_0 \left(\displaystyle\frac{\Omega_{m,0}}{a} + a^2 \Omega_{\Lambda,0}\right)^{\frac{1}{2}}}

[dextercioby]

Yikes,i guess i'm still a rookie...:redface:

Daniel.

[bomba923]

\begin{array}{l}
Would{\rm }it{\rm }be{\rm }O.K{\rm }to{\rm }write{\rm }complete{\rm }posts{\rm }in{\rm }LaTex, \\
without{\rm }math{\rm }in{\rm }them \ldots {\rm }just{\rm }writing? \\
\end{array}

NOt that I can---but what if :smile: ?

[hellfire]

Use \displaystyle
Thank you!

[richnfg]

v = 0.13



P = \frac{1}{f}

[richnfg]

/mean=\frac{\sum x}{n}

[robphy]

\begin{array}{l}
Would{\rm }it{\rm }be{\rm }O.K{\rm }to{\rm }write{\rm }complete{\rm }posts{\rm }in{\rm }LaTex, \\
without{\rm }math{\rm }in{\rm }them \ldots {\rm }just{\rm }writing? \\
\end{array}

NOt that I can---but what if :smile: ?

You probably wanted to put the extra backslash to escape the space {\rm\ } to get

\begin{array}{l}
Would{\rm\ }it{\rm\ }be{\rm\ }O.K{\rm\ }to{\rm\ }write{\rm\ }complete{\rm\ }posts{\rm\ }in{\rm\ }LaTex, \\
without{\rm\ }math{\rm\ }in{\rm\ }them \ldots {\rm\ }just{\rm\ }writing? \\
\end{array}

You could just write it in an mbox

\mbox{ Would it be O.K to write complete posts in \LaTeX, \\
without math in them \[\ldots\] just writing? }

or in a verbatim environment

\begin{verbatim}
Would it be O.K to write complete posts in LaTeX,
without math in them... just writing?
\end{verbatim}


However, I think it is probably discouraged to post like this.

[bomba923]

The quadratic formula:

\begin{gathered}
ax^2 + bx + c = 0,\\
x = \frac{{ - b \pm \sqrt {b^2 - 4ac} }}
{{2a}} \hfill \\
\end{gathered}

[bomba923]

Brachistochrone Equation:
{\left\{ \begin{gathered}
x = r\left( {\theta - \sin \theta } \right) \hfill \\
y = r\left( {1 - \cos \theta } \right) \hfill \\
\end{gathered} \right\}}

[OlderDan]

Whenever you want to include a graphic on the same line with your text, like C H_4 or G_\textrm{diffeo} or y = mx + b, you should use [ itex ]...[ /itex ] instead of [ tex ]...[ /tex ]. The "i" means "inline."

Click on each of the examples above to "learn by example."

If you have questions or comments about this site addition, you are welcome to post them here!

Good luck, and enjoy the system.

- Warren

I came looking specifically because my "inlines" were not in line. Glad to find this, but even with the itex the graphic is still raised. Is there a trick for lowering it more if you want to?

Edit

I am on a different machine now, and things look different. The inline text here does look inline. It is some local setting on my computer making the difference.

[twoflower]

blablablah \\
newlineblabla


Why doesn't \\ insert a new line for me? :confused:

[Starship]

Problems with brackets:

\left(\begin{array}{cc}\frac{\partial u}{\partial x}&\frac{\partial \nu}{\partial x}\\ \frac{\partial \nu}{\partial x}&\frac{\partial u}{\partial x}\end{array}\right)

\phi(x,y)

\frac{\partial^2 \phi}{\partial u^2} + \frac{\partial^2 \phi}{\partial \nu^2} = 0

w = u(x,y) + i\nu(x,y)

\frac{\partial \phi}{\partial x} = \frac{\partial \phi}{\partial u} \frac{\partial u}{\partial x} + \frac{\partial \phi}{\partial \nu} \frac{\partial \nu}{\partial x}

and

\frac{\partial \phi}{\partial y} = \frac{\partial \phi}{\partial u} \frac{\partial u}{\partial y} + \frac{\partial \phi}{\partial \nu} \frac{\partial \nu}{\partial y}

A second differentiation of these yields the results:

\frac{\partial^2 \phi}{\partial x^2} = \frac{\partial \phi}{\partial u} \frac{\partial^2 u}{\partial x^2} + \left ( \frac{\partial^2 \phi}{\partial u^2} \frac{\partial u}{\partial x} + \frac{\partial^2 \phi}{\partial \nu \partial u} \frac{\partial \nu}{\partial x} \right ) \frac{\partial u}{\partial x} + \frac{\partial \phi}{\partial \nu} \frac{\partial^2 \nu}{\partial x^2} + \left ( \frac{\partial^2 \phi}{\partial u \partial \nu} \frac{\partial u}{\partial x} + \frac{\partial^2 \phi}{\partial \nu} \frac{\partial \nu}{\partial x} \right ) \frac{\partial \nu}{\partial x}

Adding:

\frac{\partial^2 \phi}{\partial x^2} + \frac{\partial^2 \phi}{\partial y^2} = \frac{\partial \phi}{\partial u} \left ( \frac{\partial^2 u}{\partial x^2} + \frac{\partial^2 u}{\partial y^2} \right ) + \frac{\partial^2 \phi}{\partial u^2} \left [ \left ( \frac{\partial u}{\partial x} \right )^2 + \left ( \frac{\partial u}{\partial y} \right )^2 \right ] + 2 \frac{\partial^2 \phi}{\partial u \partial \nu} \left ( \frac{\partial u}{\partial x} \frac{\partial \nu}{\partial y} \right ) + \frac{\partial \phi}{\partial \nu} \left ( \frac{\partial^2 \nu}{\partial x^2} + \frac{\partial^2 \nu}{\partial y^2} \right ) + \frac{\partial^2 \phi}{\partial \nu^2} \left [ \left ( \frac{\partial \nu}{\partial x} \right )^2 + \left ( \frac{\partial \nu}{\partial y} \right )^2 \right ]

w = u + i\nu

\frac{\partial^2 \phi}{\partial x^2} + \frac{\partial^2 \phi}{\partial y^2} = \frac{\partial^2 \phi}{\partial u^2} \left [ \left ( \frac{\partial \nu}{\partial x} \right )^2 + \left ( -\frac{\partial \nu}{\partial x} \right )^2 \right ] + \frac{\partial^2 \phi}{\partial \nu^2} \left [ \left ( \frac{\partial \nu}{\partial x} \right )^2 + \left ( \frac{\partial u}{\partial x} \right )^2 \right ] = \left [ \left ( \frac{\partial u}{\partial x} \right )^2 + \left ( \frac{\partial \nu}{\partial x} \right )^2 \right ] \left ( \frac{\partial^2 \phi}{\partial u^2} + \frac{\partial^2 \phi}{\partial \nu} \right ) = |f'(z)|^2 \left ( \frac{\partial^2 \phi}{\partial u^2} + \frac{\partial^2 \phi}{\partial \nu^2} \right )

[bomba923]

Just redefining an earlier problem I had (Do NOT pay attention to this! :smile:)

{\text{Let}} f_n \left( t \right) = \left\{ \begin{gathered} x_n \left( t \right) \hfill \\ y_n \left( t \right) \hfill \\ z_n \left( t \right) \hfill \\ \end{gathered} \right\} , {\text{ }} {\text{continuous}} {\text{ }} \forall t \in \left( {a,b} \right)

At any moment t \in \left( {a,b} \right) , a triangle can be defined by the set of points \left\{ {f_1 \left( t \right),f_2 \left( t \right),f_3 \left( t \right)} \right\} .
Find the exact volume generated by this triangle from t = a to t = b .

(Don't pay attention to this)

[Moo Of Doom]

a\xrightarrow{c}b

I can display things on top of arrows, but is it possible to display text under them (preferrably both above and below at the same time, actually)?

[robphy]

a \stackrel{c}{\longrightarrow} b


a \overset{c}{\longrightarrow} b

a \underset{d}{\longrightarrow} b

a \underset{d}{\overset{c}{\longrightarrow}} b

[Moo Of Doom]

Thankesy! :)

[Dr.Brain]

\sum

\int

\bigodot

[extreme_machinations]

F=GmM_e/r^2

Edit: You added an unnecessary "\" before the F and G, and left out the necessary "/" in your second bracket.

[extreme_machinations]

a^x_n ....

Edit: You left spaces in your brackets.

[extreme_machinations]

hey how come i cant get it to work ??

[Doc Al]

hey how come i cant get it to work ??
See my edits of your posts.

[nu_paradigm]

\int_{0}^{\frac{\pi}{2}} \log \cos \kappa d \kappa

[nu_paradigm]

Just trying...

\int_{0}^{\frac{\pi}{2}} \log \cos \Omega \ d \Omega

f(x) = \sin x, \mbox{if} \ x \ \epsilon \ (0, \frac{\pi}{2})

[nu_paradigm]

f(x) = \left {\begin{array}{cc}\sin x,&\mbox{if} \ x \epsilon \ [0, \frac{\pi}{2})\\ \cos x, & \mbox{if} \ x \epsilon \ [\frac{\pi}{2}, \pi)\end {array}\right

[extreme_machinations]

F=GmM_e/r^2

[extreme_machinations]

aaahhaa!! now that more like it
hey thanks doc

[extreme_machinations]

f(x)=sinx^2

[extreme_machinations]

int_{0}^{1} sinlogx

[extreme_machinations]

\int_{0}^{1} sin^2logcosx dx

[saltydog]

This is a test


\begin{array}{1|c|c|c|c|c|}
\text{Fixed Point}&\text{Jacobian}&\text{Eigenvalues}&\text{Eigenvectors}&\text{type}\\
\hline
(0,0)&
\left(\begin{array}{cc}1.5 & 0 \\ 0 & 2 \end{array}\right)&
2,1.5 &
\left(\begin{array}{ca}0 \\ 1 \end{array}\right)
\left(\begin{array}{ca}1 \\ 0 \end{array}\right)&
\text{Source}\\
\hline

(0,2)&
\left(\begin{array}{cc}0.5 & 0 \\ -1.5 & -2 \end{array}\right)&
-2,0.5 &
\left(\begin{array}{ca}0 \\ 1 \end{array}\right)
\left(\begin{array}{ca}0.86 \\ -0.51 \end{array}\right)&
\text{Saddle}\\
\hline

(1.5,0)&
\left(\begin{array}{cc}-1.5 & -0.75 \\ 0 & 0.88 \end{array}\right)&
-1.5,0.88 &
\left(\begin{array}{ca}1 \\ 0 \end{array}\right)
\left(\begin{array}{ca}-0.3 \\ 0.95 \end{array}\right)&
\text{Saddle}\\
\hline

(4/5,7/5)&
\left(\begin{array}{cc}-0.8 & -0.4 \\ -1.05 & -1.4 \end{array}\right)&
-1.8,-0.38 &
\left(\begin{array}{ca}0.37 \\ 0.93 \end{array}\right)
\left(\begin{array}{ca}0.69 \\ -0.72 \end{array}\right)&
\text{Sink}\\
\hline

\end{array}


Slick!

[dextercioby]

\int_{0}^{1} sin^2logcosx dx


Doesn't look good.This one does.

\int_{0}^{1} \sin^{2}x \ln\cos x \ dx


Daniel.

[lawtonfogle]

please help, i cannot find the 'does not equal' latex equation

[dextercioby]

\neq should do it.

Daniel.

[lawtonfogle]

a \neq b

this should work

[lawtonfogle]

next question, can i download this for my computer, i have a paper due when i return to school, and it will be a vast help to be able to type the symbols.

[bomba923]

Do NOT pay attention to this! (Just the triangle problem)--Do Not pay attention to this!

[bomba923]

Do NOT pay attention to this! (Just the triangle problem)--Do Not pay attention to this!

A\left( t \right) = \frac{{\left\| {\left[ {\vec r_2 \left( t \right) - \vec r_1 \left( t \right)} \right] \times \left[ {\vec r_3 \left( t \right) - \vec r_2 \left( t \right)} \right]} \right\|}}{2}
-----------------
And the coordinate system based on parameter t by unit vectors:

\vec u\left( t \right) = \frac{{\vec r_1 \left( t \right) - \vec r_2 \left( t \right)}}{{\left\| {\vec r_1 \left( t \right) - \vec r_2 \left( t \right)} \right\|}} \\

\vec v\left( t \right) = \frac{{\left[ {\vec r_3 \left( t \right) - \vec r_1 \left( t \right)} \right]\left\| {\vec r_1 \left( t \right) - \vec r_2 \left( t \right)} \right\|^2 - \left[ {\vec r_1 \left( t \right) - \vec r_2 \left( t \right)} \right]\left\{ {\left[ {\vec r_1 \left( t \right) - \vec r_2 \left( t \right)} \right] \cdot \left[ {\vec r_1 \left( t \right) - \vec r_3 \left( t \right)} \right]} \right\}}}{{\left\| {\left[ {\vec r_3 \left( t \right) - \vec r_1 \left( t \right)} \right]\left\| {\vec r_1 \left( t \right) - \vec r_2 \left( t \right)} \right\|^2 - \left[ {\vec r_1 \left( t \right) - \vec r_2 \left( t \right)} \right]\left\{ {\left[ {\vec r_1 \left( t \right) - \vec r_2 \left( t \right)} \right] \cdot \left[ {\vec r_1 \left( t \right) - \vec r_3 \left( t \right)} \right]} \right\}} \right\|}} \\
\end{array}

Again----Do NOT pay attention to this!

[kuengb]

Hello everybody

Sorry if this has been discussed already, I couldn't find anything like it:
How can I create a statement like

\hat{\xi}(g_0) \longrightarrow \infty \ (g_0 \rightarrow g_0^*),

but with the second limit written smaller and below the first arrow?

Thanks, Bruno

[dextercioby]

\hat{\xi}\left(g_{0}\right)\substack{\displaystyle {\longrightarrow}\\g_{0}\rightarrow g_{0}^{*}} \infty

Daniel.

[robphy]

Here's a little modification of dextercioby's suggestion.
\hat{\xi}\left(g_{0}\right)
\underset{ g_{0}\rightarrow g_{0}^{*}
}{
\overrightarrow{\qquad\qquad}
}\
\infty
or
\hat{\xi}\left(g_{0}\right)
\underset{ g_{0}\rightarrow g_{0}^{*}
}{
\overrightarrow{\qquad}
}\
\infty

[kuengb]

Thank you! That's exactly what I've looked for.

[extreme_machinations]

B_z=B_0(1-aZ)

[extreme_machinations]

B_r=B_0br_0

[calculus1967]

\int_0^5 f(x) dx = \frac{125}{3}
where f(x) = x^2

[dextercioby]

U can use "{}" or "\qquad" or simply "space \ space" to place a space between "f(x)" and "dx".

Daniel.

[calculus1967]

\ln(ab) = \int_1^{a} \frac{1}{t} dt + \int_a^{ab} \frac{1}{t} dt

[KaneOris]

s = 1/2(u+v)t

[KaneOris]

s = u+v/2*t

[KaneOris]

Speed of Satellite
v = \frac {2\pi R}{T}

Acceleration of a Satellite in Orbit

a = \frac {v^2}{R} = \frac {4\pi^2R}{T^2} = \frac {GM}{R^2} = g

Gravitational force on body in Orbit
F_g = mg = \frac {mv^2}{R} = \frac {4\pi^2Rm}{T^2} = \frac {GMm}{R^2} = g

Gravitational Constant G
G = 6.67\times10^{-11} N m^2 kg^{-2}

Motion at uniform acceleration
x = \frac {u+v}{2}t
v = u + at
x = ut + \frac {at^2}{2}
x = vt - \frac {at^2}{2}
v^2 = u^2 + 2ax

Newtons 2nd Law
\sum{F} = ma

Inclined Plane
a = g\sin\theta

Momentum & Impulse
\Delta{p} = m\Delta{v} = \sum{F\Delta{t}} = I

Kinetic Energy
E_k = \frac {mv^2}{2}

Potential Grav Energy
U_g = mgh

Work
Fx\cos\theta

Hooke's Law
F_s = -kx

[saltydog]

Check of alignment of equal signs (use of * disables auto gen of equation numbers):

For this sum:

\sum_{n=1}^{\infty}\frac{(-2)^{-n}}{n+1}

Consider:

ln(1+x)=\sum_{n=1}^{\infty}\frac{(-1)^{n+1}x^n}{n}\quad\text{for}\quad-1<x<1

Letting x=\frac{1}{2}

ln(3/2)=\sum_{n=1}^{\infty}\frac{(-1)^{n+1}}{2^n n}

Letting i=n-1 we obtain:

\begin{align*}

ln(3/2)=\sum_{n=1}^{\infty}\frac{(-1)^{n+1}}{2^n n}&=\sum_{i=0}^{\infty}\frac{(-1)^{i+2}}{2^{i+1} (i+1)}\\

&=\frac{1}{2}+\sum_{i=1}^{\infty}\frac{(-1)^2 (-1)^i}{(2)2^i(i+1)}\\

&=\frac{1}{2}+\frac{1}{2}\sum_{i=1}^{\infty}\frac{(-1)^i}{2^i(i+1)}\\

&=\frac{1}{2}+\frac{1}{2}\sum_{i=1}^{\infty}\frac{(-2)^{-i}}{i+1}

\end{align}

Solving for the series, I obtain:

\sum_{i=1}^{\infty}\frac{(-2)^{-i}}{(i+1)}=-1+2ln(3)-2ln(2)

This result agrees with Mathematica.

[saltydog]

check of equation numbering


\reqno
\begin{align}
a&=b \\
c&=d \\
x+4x-7y&=z \\
a+b+c+d+e+f &= k\\
&=h+k+l+m
\end{align}

[lawtonfogle]

I hope you don't mine be using this since i cannot get latex working on my computer.

[lawtonfogle]

Pre 1

DO NOT USE ANY CALCULATORS

1. \begin{array} 890 + 437 + 873 + 1024 + 273.3 + 1267 = X \\
X = \end{array}

[bomba923]

Don't mind this, just testing LaTex:

\left\{ \begin{gathered}
A_n = \frac{{\left( { - 1} \right)^n + 2n - 1}}
{4} \hfill \\
B_n = \frac{{ - \left( { - 1} \right)^n + 2n + 1}}
{4} \hfill \\
C_n = \frac{{\left( { - 1} \right)^n + 2n + 3}}
{4} \hfill \\
\end{gathered} \right\}
\right\} \frac{1}{2}\mathop {\lim }\limits_{\Delta t \to \infty } \sum\limits_{n = 0}^{2\left( {\frac{{b - a}}{{\Delta t}}} \right) - 1} {\left\{ {\left[ {\vec r_1 \left( {a + A_n \Delta t} \right) - \vec r_2 \left( {a + B_n \Delta t} \right)} \right] \times \left[ {\vec r_3 \left( {a + B_n \Delta t} \right) - \vec r_4 \left( {a + C_n \Delta t} \right)} \right]} \right\}}

[bomba923]

Sorry, the limit in my last post was to go to zero! And my vectors are wrong. Again, don't mind this:

\left\{ \begin{gathered}
A_n = \frac{{\left( { - 1} \right)^n + 2n - 1}}
{4} \hfill \\
B_n = \frac{{ - \left( { - 1} \right)^n + 2n + 1}}
{4} \hfill \\
C_n = \frac{{\left( { - 1} \right)^n + 2n + 3}}
{4} \hfill \\
\end{gathered} \right\}
\right\} \frac{1}{2}\mathop {\lim }\limits_{\Delta t \to 0 } \sum\limits_{n = 0}^{2\left( {\frac{{b - a}}{{\Delta t}}} \right) - 1} {\left\{ {\left[ {\vec r_1 \left( {a + A_n \Delta t} \right) - \vec r_2 \left( {a + B_n \Delta t} \right)} \right] \times \left[ {\vec r_1 \left( {a + B_n \Delta t} \right) - \vec r_2 \left( {a + C_n \Delta t} \right)} \right]} \right\}}

[MalleusScientiarum]

[tex] \sum_n R_{n,n'} v_n = v_{n'} [\tex]

Okay...what went wrong there?

[Integral]

\sum_n R_{n,n'} v_n = v_{n'}

Okay...what went wrong there?


change [\tex] to [/tex]

\sum_n R_{n,n'} v_n = v_{n'}

[dextercioby]

Sorry, the limit in my last post was to go to zero! And my vectors are wrong. Again, don't mind this:

\left\{ \begin{gathered}
A_n = \frac{{\left( { - 1} \right)^n + 2n - 1}}
{4} \hfill \\
B_n = \frac{{ - \left( { - 1} \right)^n + 2n + 1}}
{4} \hfill \\
C_n = \frac{{\left( { - 1} \right)^n + 2n + 3}}
{4} \hfill \\
\end{gathered} \right\}
\right\} \frac{1}{2}\mathop {\lim }\limits_{\Delta t \to 0 } \sum\limits_{n = 0}^{2\left( {\frac{{b - a}}{{\Delta t}}} \right) - 1} {\left\{ {\left[ {\vec r_1 \left( {a + A_n \Delta t} \right) - \vec r_2 \left( {a + B_n \Delta t} \right)} \right] \times \left[ {\vec r_1 \left( {a + B_n \Delta t} \right) - \vec r_2 \left( {a + C_n \Delta t} \right)} \right]} \right\}}

You know, rather than abusing our LaTex compiler, maybe you should get a hand on a version of TeXAide or other application which can compile LaTex code. It's not really fair towards the users of the site, and neither to its owner.

Daniel.

[MalleusScientiarum]

I personally recommend MikTeX, I'm very pleased with it.

[bomba923]

You know, rather than abusing our LaTex compiler, maybe you should get a hand on a version of TeXAide or other application which can compile LaTex code. It's not really fair towards the users of the site, and neither to its owner.

Daniel.
Abusing the compiler? :bugeye:
*How am I abusing the LaTex compiler?
(was the LaTex code too long?)

My post was an equation for the area of a certain kind of ruled surface,
as seen on the thread http://www.physicsforums.com/showthread.php?t=77312
(apparently I wasn't abusing at that time?)
*And TeXAide is not needed, uc, for my equation came out just the way I intended without "Aid". What exactly is wrong with it?

[dextercioby]

You've already been told about the "preview post" feature which allows you to see the compiled code before submitting the message. Use it.

Daniel.

[aricho]

is there any way to produce a numberplane using LaTeX? or anythin simialir?

[bomba923]

You've already been told about the "preview post" feature which allows you to see the compiled code before submitting the message. Use it.

Daniel.

I did, but I couldn't do it for my first post. When I returned to this thread (after visiting some other site), I could not at all find that "Edit" button--and could not change the post. (and then i wrote that second post)\-(very Sorry for the inconvenience :frown:!/:frown:/)
------------------------------------------------------
Btw, what notation is used to express limits of a sequence?
Let's say I have the simple arithmetic sequence A_n defined as
A_n = n , and I want to express this sequence up to 1631. Do
I have to write out \left\{ {0,1,2, \ldots ,1631} \right\} , or can I just simply write:
\left\{ {A_n } \right\}_0^{1631} ..or just \left\{ {n} \right\}_0^{1631}
?? Is it ok to use the latter??

[Orion1]

My Latex 'texify.exe' program currently compiles my *.dvi files at an apparent default character screen width of '13 cm', I manually determined this value by measuring a physical hard copy of a default *.dvi character printout.

Is there a simple command or option of increasing this width value?

[lonelyphysicist]

The simple_wick.tex file works very well. I could not get the other one to work. I also did not have any of the problems the author gives for simple_wick.tex.



Norman

Could you explain how to use this simple_wick.tex file? I don't understand the example given at all.

Thanks!

[syd]

Very nice forum you've got here!

I just wondered, how do you create the 1-bit transparent PNGs for the equations on this forum?? I'm setting up a web site of my own where I'll be displaying lots of latex-generated equations. I have tried with both 'convert' and 'dvipng' to create the PNGs, but all I can get is alpha-channel transparent PNGs, which of course don't work in Internet Explorer. I've tried everything, or so it seems, but with no luck whatsoever. Can anyone give me a hint on how to do this?

Thanks!

[brian0918]

\frac{1}{\pi} = 12 \sum^\infty_{k=0} \frac{(-1)^k (6k)! (13591409 + 545140134k)}{(3k)!(k!)^3 640320^{3k + 3/2}}

[Hurkyl]

Crossing my fingers:


\begin{CD}
S^{{\mathcal{W}}_\Lambda} \otimes T @>j>> T\\
@VVV @VV{\End P}V \\
(S \otimes T) / I @= (Z \otimes T) / J
\end{CD}


Oh well, no amscd.

[JamesU]

\sqrt{this is Very cool} \Upsilon \varrho \varsigma \overrightarrow{it} \overleftarrow{is}

[Castilla]

f(x,y) = \int_y^{x}t^{xy}dt

Nice. :approve:

[Castilla]

Testing...

{\int_1^\sqrt{x}} t^{x}dt

[Castilla]

Testing...

If the functions f(x,t) and
\frac{\partial}{\partial t}f(x,t) are continuous in
[a,b] \times [c,d] , then \frac{d}{dt}\int_a^{b}f(x,t)dx = \int_a^{b}\frac{\partial}{\partial t}f(x,t)dx.

[JamesU]

\sqrt{Opposite^2 + Adjacent^2} = Hypotenuse

[beautiful1]

I too am just testing
\int dx \int dy \exp (-a (x+y)^2 +ib(x-y)) sinc(cx+dy) sinc(dx+cy)

[JamesU]

\sqrt{cool} = \sqrt{me} . \ me^2=me. \ cool^2=awesome. \ so \ me = awesome

[fliptomato]

QUESTION...

In the archives for this forum, someone suggested the following site for a script on how to put in wick contractions into latex:

http://www.fzu.cz/~kolorenc/tex.php

The post suggested using simple_wick.tex, saying it worked very well.

I agree that it works... but I can't figure out how to use it. That is, the example works well, and I can toy around and get random results, but I can't figure out what the logical rules are to use this script. Any ideas?

Best,
Flip

[Neohaven]

As x tends to infinity, the limit of 1/x is such that


\mathop {\lim }\limits_{x \to \infty } f(x) = 0


Works kinda well, doesn't it? Too bad it doesn't work on my computer... :mad:

[tomfitzyuk]

T = \frac{1}{f} = 2 \pi \sqrt \frac{l}{g}

[calculus1967]

Let the function f be continuos on the closed interval [a, b], and assume that f(x) \geq 0 for all x in [a, b]. If S is the solid of revolution obtained by revolving about the x axis the region bounded by the curve y = f(x), the x axis, and the lines x = a and x = b, and if V is the number of cubic units in the volume of S, then

V = \pi \int^b_{a}[f(x)]^2 dx

[blimkie]

[ tex ] a^x_n [ /tex ]

[Jeff Ford]

Just a test

a^_x

[bomba923]

I think we all know Taylor expansion:

\boxed{f\left( x \right) = \sum\limits_{n = 0}^\infty {\frac{{f^{\left( n \right)} \left( a \right)}}{{n!}}\left( {x - a} \right)^n } ,\left| {x - a} \right| < R}

[wr1015]

F_{1}+F{2}

just testing

[ktoz]

level: 1

\sum_{j=0}^m a + cj = \frac{(m + 1)(2a + cm)}{2}


level: 2

\sum_{j=0}^m \frac{(j + 1)(2a + cj)}{2} = \frac{(m + 1)(m + 2)(3a + cm)}{6}\\


level: 3

\sum_{j=0}^m \frac{(j + 1)(j + 2)(3a + cj)}{6} = \frac{(m + 1)(m + 2)(m + 3)(4a + cm)}{24}\\


level: 4

\sum_{j=0}^m \frac{(j + 1)(j + 2)(j + 3)(4a + cj)}{24} = \frac{(m + 1)(m + 2)(m + 3)(m + 4)(5a + cm)}{120}\\


level: n

= \frac{(m + n)!(a(n + 1) + cm)}{m!(n + 1)!}


As product

\frac{(m + n)!(a(n + 1) + cm)}{m!(n + 1)!} = (a(n + 1) + cm) \prod_{j=1}^n \frac{m + j}{j + 1}

[saltydog]

Did I mention Mathematica has an Eigenvector[Matrix] command? However, I'm not good at calculating eigenvectors so I really should do a few by hand:

The eigenvector equation is simple:


\mathbf{M}v=\lambda v


So for:


\lambda_1=-1



\left(
\begin{array}{ccc} 1 & 0 & 3 \\
0 & -1 & 0 \\
-3 & 0 & 1
\end{array}
\right)
\left(
\begin{array}{c} x \\
y \\
z
\end{array}
\right)=-1
\left(
\begin{array}{c} x \\
y \\
z
\end{array}
\right)


So:


x+3z=-x\\
-y=-y\\
-3x+z=-z


The middle one is easy:


0y=0


That means y can be anything so let y=1.
The other two:


2x+3z=0
-3x+2z=0


The simple thing here, since we're looking for ANY eigenvector, is to just pick the zero solution and thus:


v_1=
\left(
\begin{array}{c} 0 \\
1 \\
0
\end{array}
\right)


For:

\lambda_2=(1+3i)



\left(
\begin{array}{ccc} 1 & 0 & 3 \\
0 & -1 & 0 \\
-3 & 0 & 1
\end{array}
\right)
\left(
\begin{array}{c} x \\
y \\
z
\end{array}
\right)=(1+3i)
\left(
\begin{array}{c} x \\
y \\
z
\end{array}
\right)


So that's:


x+3z=(1+3i)x
-y=(1+3i)y
-3x+z=(1+3i)z


For the middle one, the only way ay=y is if y=0. The other two yield:

3z=3ix


or:

z=ix

so let x=1 and z=i.

Thus:


v_2=
\left(
\begin{array}{c} 0 \\
1 \\
0
\end{array}
\right)


Same dif for the other eigenvalue which yields:

v_3=
\left(
\begin{array}{c} 1 \\
0 \\
-i
\end{array}
\right)


Mathematica returns equivalent eigenvectors.
Thus we are led to the solution in matrix form:


\mathbf{x}=c_1e^{-t}
\left(
\begin{array}{c} 0 \\
1 \\
0
\end{array}
\right)+
c_2e^{(1+3i)t}
\left(
\begin{array}{c} 1 \\
0 \\
i
\end{array}
\right)+
c_3e^{(1-3i)t}
\left(
\begin{array}{c} 1 \\
0 \\
-i
\end{array}
\right)


You ever work a problem and the answer is just as difficult as the question?

[saltydog]

After reviewing, I wish to clear up two points in my efforts to solve this equation:

1. There is no need to directly calculate the eigenvector of \lambda_3:

The complex conjugate of an eigenvector for \lambda_2 is an eigenvector for \lambda_3[/tex].

So above I calculated the eigenvector for [itex](1+3i) to be:

v_2=\left(\begin{array}{c} 1 \\0 \\i\end{array}\right)

Therefore to calculate the eigenvector for (1-3i), conjugate the eigenvector for [itex](1+3i)[/tex]:

If:

v_2=\left(\begin{array}{c} 1+0i \\0+0i \\0+i\end{array}\right)

Then:

\overline{v_2}=v_3=\left(\begin{array}{c} 1-0i \\0-i \\0-i\end{array}\right)=\left(\begin{array}{c} 1 \\0 \\-i\end{array}\right)

See how that works?

Ok that's one.

2. The complex eigenvalues both yield the same solution! That is, the solution from (1+3i) is the same solution as that from (1-3i). Go figure. I did. So that's the reason we only need calculate the Real and Complex contribution from ONE member of each complex pair. And also, it's VERY convenient to write the eigenvectors as:

\left(\begin{array}{c} 1 \\0 \\-i\end{array}\right)=\left(\begin{array}{c} 1 \\0 \\0\end{array}\right)+i\left(\begin{array}{c} 0 \\0 \\1\end{array}\right)

Alright, so lets compute the Real part and the Complex part for:


\begin{align*}
e^{(1+3i)t}\left(\begin{array}{c} 1 \\0 \\i\end{array}\right)
&=e^{(1+3i)t}\left[\left(\begin{array}{c} 1 \\0 \\0\end{array}\right)+i\left(\begin{array}{c} 0 \\0 \\1\end{array}\right)\right] \\
&=e^t\left[(Cos(3t)+iSin(3t))\left\{\left(\begin{array}{c} 1 \\0 \\0\end{array}\right)+
i\left(\begin{array}{c} 0 \\0 \\1\end{array}\right)\right\}\right] \\
&=e^t\left[Cos(3t)\left(\begin{array}{c} 1 \\0 \\0\end{array}\right)+iCos(3t)\left(\begin{array}{ c} 0 \\0 \\1\end{array}\right)+iSin(3t)\left(\begin{array}{ c} 1 \\0 \\0\end{array}\right)-Sin(3t)\left(\begin{array}{c} 0 \\0 \\1\end{array}\right)\right] \\
&=e^t\left[C_1\left\{Cos(3t)\left(\begin{array}{c} 1 \\0 \\0\end{array}\right)-Sin(3t)\left(\begin{array}{c} 0 \\0 \\1\end{array}\right)\right\}+C_2\left\{Cos(3t)\le ft(\begin{array}{c} 0 \\0 \\1\end{array}\right)+Sin(3t)\left(\begin{array}{c } 1 \\0 \\0\end{array}\right)\right\}\right]
\end{align}


This with the first solution then yields the general solution:


\begin{align*}
\mathbf{X}&=C_1e^{-t}\left(\begin{array}{c} 0 \\1 \\0\end{array}\right) \\
&+e^t\left[C_2\left\{Cos(3t)\left(\begin{array}{c} 1 \\0 \\0\end{array}\right)-Sin(3t)\left(\begin{array}{c} 0 \\0 \\1\end{array}\right)\right\}+C_3\left\{Cos(3t)\le ft(\begin{array}{c} 0 \\0 \\1\end{array}\right)+Sin(3t)\left(\begin{array}{c } 1 \\0 \\0\end{array}\right)\right\}\right]
\end{align}


That's read as:

x(t)=C_2e^tCos(3t)+C_3e^tSin(3t)

y(t)=C_1e^{-t}

z(t)=-C_2e^tSin(3t)+C_3e^tCos(3t)

[dekoi]

avg=\frac{n_1+n_2+n_3+n_4+n_5}{n}


dv_n=average-reading_n
\delta=\sqrt{\frac{dv_1^2+dv_2^2+dv_3^2+dv_4^2+dv_ 5^2}{n-1}}
\delta_{avg}=\frac{\delta}{\sqrt{n}}


v_n=\frac{d_n}{t_n}


\Delta v_n=v_n\sqrt{(\frac{\Delta L}{l})^2+(\frac{\Delta t_n}{t_n})^2}


\rho_n=m_n(\frac{3}{4\pi})(\frac{d_n}{2})^{-3}


\Delta\rho_n=6\sqrt{\frac{9\Delta d_n^2m_n^2}{\pi^2d_n^8}+\frac{\Delta m_n^2}{\pi^2d_n^6}}

\eta_n=(\frac{2g}{9v_n})(\frac{d_n}{2})^2(\rho_n-\rho_l)

[dekoi]

\Delta\eta_n=\frac{2}{9}\sqrt{\frac{4\Delta r_n^2g^2r_n^2(\rho_n-\rho_l)^2}{v_n^2}+\frac{\Delta\rho_n^2g^2r_n^4}{v_ n^2}+\frac{\Delta g^2r_n^4(\rho_n-\rho_l)^2}{v_n^2}+\frac{\Delta\rho_l^2g^2r_n^4}{v_ n^2}+\frac{\Delta v_n^2g^2r_n^4(\rho_n-\rho_l)^2}{v_n^4}}

[dekoi]

m_{avg}=\frac{19.837+19.839+19.840+19.841+19.840}{ 5}=19.84 g

v_G=\frac{0.50}{24.25}= 0.0206 m/s

\rho_G=0.01984(\frac{3}{4\pi})(\frac{0.02451}{2})^ {-3}= 2573 kg/m^3

\eta_G=(\frac{2g}{9(0.0206)})(\frac{0.02451}{2})^2 (2573-1013)= 24.77 kg/ms

[dekoi]

dv_1=24.51-24.70= -0.19 mm
dv_2=24.51-24.40= 0.11 mm
dv_3=24.51-24.44= 0.07 mm
dv_4=24.51-24.32= 0.19 mm
dv_5=24.51-24.68= -0.17mm
\delta_G=\sqrt{\frac{-0.19^2+0.11^2+0.07^2+0.19^2+-0.17^2}{5-1}}= 0.1718 mm
\delta_{avg of G}=\frac{0.1718}{\sqrt{5}}= 0.07683 mm

\Delta v_G=0.0206\sqrt{(\frac{0.003}{0.50})^2+(\frac{\0.1 566}{24.25})^2}= 0.00018 m/s

\Delta\rho_G=6\sqrt{\frac{9(0.00007683)^2(0.01984) ^2}{\pi^20.02451^8}+\frac{0.00005^2}{\pi^20.02451^ 6}}= 25.05 kg/m^3

[dekoi]

\heartsuit I LOVE YOU ALEX \heartsuit

[dekoi]

\Delta\eta_G=\frac{2}{9}\sqrt{\frac{4(0.000038415) ^2(9.8)^2(0.012255)^2(2573-1013)^2}{0.0206^2}+\frac{(25.05)^2(9.8)^2(0.012255 )^4}{0.0206^2}

\sqrt{adfsadfasf+\frac{(0.005)^2(0.012255)^4(2573-1013)^2}{0.0206^2}+\frac{(5)^2(9.8)^2(0.012255)^4} {0.0206^2}
+\frac{(0.00018)^2(9.8)^2(0.012255)^4(2573-1013)^2}{0.0206^4}}= 0.4854 kg/ms}

[dekoi]

sorry everyone.. just testing for a lab report

[saltydog]

First, let's clean up the functional: Really, if we want to minimize that integral, we can just move U across the integral sign right, and let's put the exponential in the numerator:

\mathbf{T}[y(x)]=\frac{1}{U}\int_{p_1}^{p_2} e^{y/h}\sqrt{1+(y^{'})^2}dx


So:

F(x,y,y^{'})=e^{y/h}\sqrt{1+(y^{'})^2}

and therefore:

\frac{\partial F}{\partial y}=\frac{e^{y/h}\sqrt{1+(y^{'})^2}}{h}

and:

\frac{\partial F}{\partial y^{'}}=\frac{e^{y/h}y^{'}}{\sqrt{1+(y^{'})^2}}

and so:


\begin{align*}
\frac{d}{dx}\left(\frac{\partial F}{\partial y^{'}}\right)&=\frac{d}{dx}\left[\frac{e^{y/h}y^{'}}{\sqrt{1+(y^{'})^2}}\right] \\

&=\frac{d}{dx}\left[e^{y/h}y^{'} \cdot \frac{1}{\sqrt{1+(y^{'})^2}}\right] \\

&=\left[e^{y/h}y^{'}\cdot\frac{-1/2}{(1+(y^{'})^2)^{3/2}}\cdot 2 y^{'}y^{''} \\

&+\frac{1}{\sqrt{1+(y^{'})^2}}\left(e^{y/h}y^{''}+y^{'}\frac{1}{h}y^{'}e^{y/h}\right) \\

&=\frac{e^{y/h}y^{''}}{\sqrt{1+(y^{'})^2}}-\frac{e^{y/h}(y^{'})^2y^{''}}{(1+(y^{'})^2)^{3/2}}+
\frac{e^{y/h}(y^{'})^2}{h\sqrt{1+(y^{'})^2}}







\end{align}


So, once we obtain the partials, then we substitute them into the Euler equation and equate the expression to zero. Now, can you please substitute these expressions into:

\frac{\partial F}{\partial y}-\frac{d}{dx}\left(\frac{\partial F}{\partial y^{'}}\right)=0

and post the results?

Also, with regards to h=1: I just worked the problem with that value and obtained the results you indicated. Perhaps it works for any value of h. Not sure.

[dekoi]

\heartsuit I\; Love\; You\; Alex! \heartsuit

[dekoi]

\Delta\eta_G=\frac{2}{9}\sqrt{\frac{4(0.000038415) ^2(9.8)^2(0.012255)^2(2573-1013)^2}{0.0206^2}+\frac{(25.05)^2(9.8)^2(0.012255 )^4}{0.0206^2}+\frac{(0.005)^2(0.012255)^4(2573-1013)^2}{0.0206^2}+\frac{(5)^2(9.8)^2(0.012255)^4} {0.0206^2}+\frac{(0.00018)^2(9.8)^2(0.012255)^4(25 73-1013)^2}{0.0206^4}}= 0.4854 kg/ms}

[dekoi]

\overrightarrow{F_f}=-6\pi\eta(\frac{d}{2})\overrightarrow{v}

\overrightarrow{mg}=\frac{4}{3}\pi(\frac{d}{2})^3\ rho_s\overrightarrow g

\overrightarrow{F_b}=-\frac{4}{3}\pi(\frac{d}{2})^3\rho_l\overrightarrow g

\overrightarrow{F_b}+\overrightarrow{F_f}+\overrig htarrow{mg} = 0

[dekoi]

avg=\frac{x_1+x_2+x_3+...+x_n}{n}

[samoth1]

\int_{0}^{1} x dx = \left[ \frac{1}{2}x^2 \right]_{0}^{1} = \frac{1}{2}

Let \theta be a (p+1)-form defined on the ranges of all the cubes of a p-chain, where p>0. Then \int_{C} d \theta = \int_{\partial C} \theta

Let\; \theta\; be\; a (p+1)-form\; defined\; on\; the\; ranges\; of\; all\; the\; cubes\; of\; a\; p-chain,\; where\; p>0.\; Then \int_{C} d \theta = \int_{\partial C} \theta.

[dekoi]

e=\frac{f}{a}
e=\sqrt{1-\frac{b^2}{a^2}}

[dekoi]

\bigoplus



asdf

[dekoi]

F_b=m_ba_b
F_e=m_ea_e
F_b=F_e
m_ba_b=m_ea_e
\frac{m_b}{m_e}=\frac{a_e}{a_b}

[spacetime]

\nabla \cross E=0
\nabla \cdot E =\frac {\rho}{\epsilon_0}




abc

[lawtonfogle]

Taken \sum F = m_1 \cdot a
We have \sum F_x = m_1 \cdot a_x and \sum F_y = m_1 \cdot a_y
With a_y = 0
We We have \sum F_x = m_1 \cdot a_x and \sum F_y = 0
So T = m_1 \cdot a_x
Taken \sum F = m_2 \cdot a
We have \sum F_y = m_2 \cdot a_y
Which is m_2 \cdot g - T = m_2 \cdot a
Inserting T = m_1 \cdot a_x into m_2 \cdot g - T = m_2 \cdot a and solving for a,
We get a = \frac {m_2 \cdot g} {m_1 + m_2}
Inserting this into T = m_1 \cdot a,
we get T = \frac {m_1 \cdot m_2 \cdot g} {m_1 = m_2}


Now, taken v^2 = v_0^2 + 2a\deltax

[lawtonfogle]

Taken \sum F = m_1 \cdot a
We have \sum F_x = m_1 \cdot a_x and \sum F_y = m_1 \cdot a_y
With a_y = 0
We We have \sum F_x = m_1 \cdot a_x and \sum F_y = 0
So T = m_1 \cdot a_x
Taken \sum F = m_2 \cdot a
We have \sum F_y = m_2 \cdot a_y
Which is m_2 \cdot g - T = m_2 \cdot a
Inserting T = m_1 \cdot a_x into m_2 \cdot g - T = m_2 \cdot a and solving for a,
We get a = \frac {m_2 \cdot g} {m_1 + m_2}
Inserting this into T = m_1 \cdot a,
we get T = \frac {m_1 \cdot m_2 \cdot g} {m_1 = m_2}


Now, taken v^2 = v_0^2 + 2a\delta x

[lawtonfogle]

Taken \sum F = m_1 \cdot a
We have \sum F_x = m_1 \cdot a_x and \sum F_y = m_1 \cdot a_y
With a_y = 0
We We have \sum F_x = m_1 \cdot a_x and \sum F_y = 0
So T = m_1 \cdot a_x
Taken \sum F = m_2 \cdot a
We have \sum F_y = m_2 \cdot a_y
Which is m_2 \cdot g - T = m_2 \cdot a
Inserting T = m_1 \cdot a_x into m_2 \cdot g - T = m_2 \cdot a and solving for a,
We get a = \frac {m_2 \cdot g} {m_1 + m_2}
Inserting this into T = m_1 \cdot a,
we get T = \frac {m_1 \cdot m_2 \cdot g} {m_1 + m_2}
Now, taken v^2 = v_0^2 + 2a\Delta x
Solving for a we get a = \frac {v^2 - V_0^2} {2\Delta x}
Taking that \Delta x = .5 and v_0 = 0
We have a = \frac {v^2} {meters*}
Now a_exp stands for experimental value of a
and [tex] a_t [/tex[ stands for theoretical value of a
so a_exp = \frac {v^2} {meters*}
and a_t = \frac {m_2 \cdot g} {m_1 + m_2}
* meters is added so units sovle correctly.

[lawtonfogle]

Taken \sum F = m_1 \cdot a
We have \sum F_x = m_1 \cdot a_x and \sum F_y = m_1 \cdot a_y
With a_y = 0
We We have \sum F_x = m_1 \cdot a_x and \sum F_y = 0
So T = m_1 \cdot a_x
Taken \sum F = m_2 \cdot a
We have \sum F_y = m_2 \cdot a_y
Which is m_2 \cdot g - T = m_2 \cdot a
Inserting T = m_1 \cdot a_x into m_2 \cdot g - T = m_2 \cdot a and solving for a,
We get a = \frac {m_2 \cdot g} {m_1 + m_2}
Inserting this into T = m_1 \cdot a,
we get T = \frac {m_1 \cdot m_2 \cdot g} {m_1 + m_2}
Now, taken v^2 = v_0^2 + 2a\Delta x
Solving for a we get a = \frac {v^2 - V_0^2} {2\Delta x}
Taking that \Delta x = .5 and v_0 = 0
We have a = \frac {v^2} {meters*}
Now a_exp stands for experimental value of a
and a_t stands for theoretical value of a
so a_exp = \frac {v^2} {meters*}
and a_t = \frac {m_2 \cdot g} {m_1 + m_2}
* meters is added so units sovle correctly.

[saltydog]

I've achieved oneness with the integral Tide . . . Here it is with your scalling factor in case other people are following this:

Above, after letting:

\sigma^2=s

and completing the square, we obtain:

2e^{-\pi/t}\int e^{t(\sigma-\sqrt{\pi}/t)^2}\sigma d\sigma

Now, in order to remove the t in the exponent, we let:

v=\sqrt{t}\sigma

so that:

dv=\sqrt{t}d\sigma,\quad \sigma=\frac{v}{\sqrt{t}},\quad d\sigma=\frac{dv}{\sqrt{t}}

Substituting this scalling factor into the exponent:


\begin{align*}
t\left[\frac{v^2}{t}-\frac{2v\sqrt{\pi}}{t\sqrt{t}}+\frac{\pi}{t^2}\rig ht]&=
v^2-2v\sqrt{\pi/t}+\frac{\pi}{t} \\
&=(v-\sqrt{\pi/t})^2
\end{align}


substituting this into the integral:

2e^{-\pi/t}\int e^{(v-\sqrt{\pi/t})^2}\left(\frac{v}{\sqrt{t}}\right)\frac{dv}{\sq rt{t}}

Simplifying:

2\frac{e^{-\pi/t}}{t}\int e^{(v-\sqrt{\pi/t})^2}dv;\quad v=\sqrt{t}\sigma;\quad \sigma^2=s

[saltydog]

I wish to finally evaluate:


y(t)=\frac{e^{-\pi/t}}{2 i t^{3/2}}\mathop\lim\limits_{R\to\infty}\left\{\text{Erf i}\left(v-\sqrt{\pi/t}\right)_{\sqrt{Rt}e^{-\pi i/4}}^{\sqrt{Rt}e^{\pi i/4}}\right\}\tag{1}


First note:


\text{Erfi}(z)=\frac{\text{Erf(iz)}}{i}=\frac{1}{i }\frac{2}{\sqrt{\pi}}\int_0^{iz} e^{-w^2}dw


Using this relation, I can re-write the above limit as:


\frac{2}{i\sqrt{\pi}}\left\{\mathop\lim\limits_{R\ to\infty}\int_0^{i(\sqrt{Rt}e^{\pi i/4})} e^{-w^2}dw-\mathop\lim\limits_{R\to\infty}\int_0^{i(\sqrt{Rt} e^{-\pi i/4})} e^{-w^2}dw\right\}


Using Euler's relation, I convert the upper limits to real and imaginary parts and multiply by i:


\begin{align*}
i\sqrt{Rt}e^{\pi i/4}&=i\left[\left(\sqrt{Rt/2}-\sqrt{\pi/2}\right)+i\sqrt{Rt/2}\right] \\
&=-\sqrt{Rt/2}+i\left(\sqrt{Rt/2}-\sqrt{\pi/t}\right)
\end{align}


Now, as R goes to infinity, this quantity goes to -\infty+i\infty.

And the lower limit:


\begin{align*}
i\sqrt{Rt}e^{-\pi i/4}&=i\left[\sqrt{Rt/2}+\left(\sqrt{Rt/2}-\sqrt{\pi/2}\right)\right] \\
&=\sqrt{Rt/2}+i\left(\sqrt{Rt/2}-\sqrt{\pi/2}\right)
\end{align}


as R goes to infinity, this limit goes to \infty+i\infty.

Thus the integrals can be rewritten as:


\frac{1}{i}\frac{2}{\sqrt{\pi}}\int_0^{-\infty+i\infty} e^{-w^2}dw-
\frac{1}{i}\frac{2}{\sqrt{\pi}}\int_0^{\infty+i\in fty} e^{-w^2}dw


I choose to evaluate these line integrals along a parametric path using the following relation from Complex Analysis:


\int_C f(z)dz=\int_c udx-vdy+i\int_c vdx+udy


Thus the first step is to express the integrand in terms of a real and imaginary part. Relying on Euler's formula:


\begin{align*}
e^{-w^2}&=e^{-(x+yi)^2} \\
&=e^{-(x^2-y^2+2xyi)} \\
&=e^{-(x^2-y^2)}Cos(2xy)+ie^{-(x^2-y^2)}(-Sin(2xy))\\
&=u+iv
\end{align}


For the first integral, the path goes from the origin to the point -\infty+i\infty

Thus if I let:

x=-t,\quad dx=-dt

y=t,\quad dy=dt

Making this substitution, note that the exponent term is 1 and we have for the first integral (with t going from 0 to infinity):


\begin{align*}
\int_0^{-\infty+i\infty} e^{-w^2}dw&=\left(-\int_0^\infty Cos(-2t^2)dt+\int_0^\infty Sin(-2t^2)dt\right) \\
&+i\left(\int_0^\infty Cos(-2t^2)dt+\int_0^\infty Sin(-2t^2)dt\right) \\
&=\left(-\frac{\sqrt{\pi}}{4}-\frac{\sqrt{\pi}}{4}\right)+i\left(\frac{\sqrt{\pi }}{4}-\frac{\sqrt{\pi}}{4}\right) \\
&=-\frac{\sqrt{\pi}}{2}
\end{align}



The same analysis can be made (with the path going from 0 to \infty+i\infty for the second integral with the results that the line integral in that case is:


\frac{\sqrt{\pi}}{2}

Substituting these values into (1), I obtain:


\frac{1}{i}\frac{2}{\sqrt{\pi}}\int_0^{-\infty+i\infty} e^{-w^2}dw=\frac{1}{i}\frac{2}{\sqrt{\pi}}(-\frac{\sqrt{\pi}}{2})=-\frac{1}{i}\frac{i}{i}=i


and:


\frac{1}{i}\frac{2}{\sqrt{\pi}}\int_0^{\infty+i\in fty} e^{-w^2}dw=\frac{1}{i}\frac{2}{\sqrt{\pi}}(\frac{\sqrt {\pi}}{2})=\frac{1}{i}\frac{i}{i}=-i


So that the limit is 2i.


Substituting this into the last expression of the inverse transform, we obtain:


y(x)=\frac{e^{-\pi/t}}{2i t^{3/2}}(2i)=\frac{e^{-\pi/t}}{t^{3/2}}

[opticaltempest]

Testing TeX output from Maple 10

\lim _{n\rightarrow \infty } \left(\frac {27}{n^2}\ \sum _{i=1}^{n} i \right )

[Arust]

Thank you, it's very useful

[TinTinn Tabulation]

I'm just TeX'ing away on the thin ice of a new Day !

\int _{0}^{1}\!{\frac {1}{\sqrt {{x}^{2}+{y}^{2}+{z}^{2}}}}{dx}=-1/2\,\ln \left( {y}^{2}+{z}^{2} \right) +\ln \left( 1+\sqrt {1+{y}^{2}+{z
}^{2}} \right)

Oo-er, me ickle preview, it preview-th not !

[Ratzinger]

a^2 I tried to preview my post but the preview only says LaTex graphic is being generated. Reload this page in a moment. But when I reload nothing happens. What can be done?

\phi (x) = \frac{1}{{(2\pi )^{3/2} }}\int {d^4 p\delta (p^2 } - m^2 )A(p)e^{ - ip \cdot x}

[ranger]

Is it possible to show when you cancel out terms i.e show a line through the terms being canceled?

[krab]

R = \frac{V}{I} = \frac{V}{small no.}
I notice a lot of this sort of error. LaTeX math typesetting cannot "know" that "small no." is not the symbols s times m times a times ... If Text appears within math symbols, it should be formatted as such. Then it is in regular type and interword spaces are observed. This is done with mbox, as for the above example:
R = \frac{V}{I} = \frac{V}{\mbox{small no.}}
And of course similarly for units: it's not
64 ft^2,
rahter, it is
64\mbox{ ft}^2

[twoflower]

Why can't I insert newline in tex code? I tried \\ but no success...

[robphy]

Is it possible to show when you cancel out terms i.e show a line through the terms being canceled?
Here's a crude way
a\hspace{-1ex}\slash +b=a\hspace{-1ex}\slash +c

I have a fancier way with a macro that requires a little trial and error.

[xouper]

For a function f : \mathbb{N} \mapsto \{0,1\}


f(n)=\left\{\begin{array}{cc}0,&\mbox{ if }f(n)=1\\1,&\mbox{ if } f(n)=0\end{array}\right.

[Doc Al]

Folks:

Use this thread to practice your Latex (that's what it's for), but unless you've come up with something that hasn't been done before in the last gazillion posts: Please delete your post after you're done!

Of course, if you've come up with something new: Leave it there for others to learn from.

Thanks!

[Astronuc]

robphy, I just clicked on kishtik's equation and I can get the LaTeX source. In your post though, it is a png file.

What I have noticed it that if one does not close the LaTeX source code viewing window, subsequent LaTeX code is added to the window (by right clicking on the LaTeX formula), and one has to scroll down to view.

[robphy]

actually, it was intended to verify that the IMG tag works here (and possibly in other non-GD areas)

[bomba923]

True or False?

\boxed{\begin{gathered}
\forall p,q,r \in \mathbb{N}\;{\text{where }}p > q > 0, \hfill \\
\exists \left\{ {a_0 ,a_1 ,a_2 , \ldots ,a_n } \right\} \subset \bigcup\limits_{i = 0}^{p - 1} {\left\{ {\frac{i}
{q}} \right\}} \hfill \\
{\text{such that }}\frac{r}
{q} = \sum\limits_{k = 0}^n {a_k \left( {\frac{p}
{q}} \right)^k } \hfill \\
\end{gathered}}

\boxed{\begin{gathered}
\forall p,q \in \mathbb{N}\;{\text{where }}p > q > 0, \hfill \\
\mathbb{N} \subset \bigcup\limits_{k \geqslant 0} {\left\{ {\sum\limits_{n = 0}^\infty {\left( {\left\lfloor {\frac{k}{{p^n }}} \right\rfloor - p\left\lfloor {\frac{k}{{p^{n + 1} }}} \right\rfloor } \right)\left( {\frac{p}{q}} \right)^n } } \right\}} \hfill \\
\end{gathered}}

[twoflower]

...\ =\ (\mbox{Lagrange})\ \sum_{i=1}^{n} \frac{\partial f}{\partial x_i} \left( \xi^{i} \right) h_i\mbox{ , kde }\xi^{i} \in [a_i, a_i\ +\ h_i]



\xi^{i} = [a_i, ..., a_{i-1}, a_i\ +\ \vartheta h_i, a_{i+1}\ +\ h_{i+1}, ..., a_n\ +\ h_n]\mbox{, }\vartheta \in (0,1)

[Cincinnatus]

testing:
x^a_i

[twoflower]

\left\{ u_{n}\right\}


is bounded in


$W^{1,N-1}\left( \Omega;\mathbb{R}^{N}\right)


,


\left\{ \mathrm{adj}\nabla u_{n}\right\} \subset L^{\frac{N}{N-1}}\left( \Omega;\mathbb{R}^{{N}\times{N}}\right)


and if


u\in BV\left( \Omega;\mathbb{R}^{N}\right)



are such that


u_{n}\rightarrow u


in


L^{1}\left( \Omega;\mathbb{R}^{N}\right)


and


\[ \det\nabla u_{n}\overset{\ast}{\rightharpoonup}\mu \]


in the sense of measures, then for


\mathcal{L}^{N}


a.e.


x\in\Omega$ \[ \det\nabla u\left( x\right) =\frac{d\mu}{d\mathcal{L}^{N}}\left( x\right). \]


The result is sharp and counterexamples are provided in the cases where regularity of


\left\{ u_{n}\right\}


or the type of weak convergence are weakened.

[StatusX]

Does anyone know of a program I can use to compile latex code? Any output format is fine, pdf, gif, etc. And simpler is better, I'm no computer programmer.

[Psi-String]

\oint \vec{E} \cdot d \vec{A} =\frac{q}{\epsilon_0}

\oint \vec{B} \cdot d \vec{A} =0

\oint \vec{E} \cdot d \vec{s} = -\frac{d \Phi_B}{dt}

\oint \vec{B} \cdot d \vec{s} = \mu_0 i + \mu_0 \epsilon_0 \frac{d \Phi_E}{dt}

[Sartak]

Of course, I have to test too. ;)

\frac{d}{dx} f(x) = \lim_{\Delta x \rightarrow 0} \frac{f(x + \Delta x) - f(x)}{\Delta x}

\int^b_a f(x) dx = F(b) - F(a)

[rea]

Does anyone know of a program I can use to compile latex code? Any output format is fine, pdf, gif, etc. And simpler is better, I'm no computer programmer.



For Windows systems, there is the option of MikTeX also there exist ghostscript and other similar packages you will need, they are free.


In Linux, I exactly dont know, but normally the distributions contain TeX and LaTeX, also there is a editor that I will like to understand called LyX, LyX is also available IRC for Windows...







Do you know any other good editor for TeX files??? for learn the basics???

[StatusX]

For Windows systems, there is the option of MikTeX also there exist ghostscript and other similar packages you will need, they are free.


I downloaded MikTex, but it seems to need a lot of other programs to work. I couldn't figure it out. I'm just looking for some program where you can give it a filename and it will compile it into some reasonable output form (preferably pdf). Do you know something like this, or if not, do you know how I can use MikTex to do what I need?

[VietDao29]

I dunno, but I think MikTex only provides a Yap viewer, i.e some kind of integrated environment for beautiful formulae (maybe I'm wrong though).
If you want to translate LaTeX code to .pdf files, I'd recommend TeXnicCenter (http://www.toolscenter.org/front_content.php)
Just download it, and run it. It can convert LaTeX to PDF, LaTeX to DVI (viewed with yap viewer), or LaTeX to PS. :smile:
Hope that's what you are looking for.

[StatusX]

I dunno, but I think MikTex only provides a Yap viewer, i.e some kind of integrated environment for beautiful formulae (maybe I'm wrong though).
If you want to translate LaTeX code to .pdf files, I'd recommend TeXnicCenter (http://www.toolscenter.org/front_content.php)
Just download it, and run it. It can convert LaTeX to PDF, LaTeX to DVI (viewed with yap viewer), or LaTeX to PS. :smile:
Hope that's what you are looking for.

Hey, thanks a lot. That's just what I needed.

[rea]

I downloaded MikTex, but it seems to need a lot of other programs to work. I couldn't figure it out. I'm just looking for some program where you can give it a filename and it will compile it into some reasonable output form (preferably pdf). Do you know something like this, or if not, do you know how I can use MikTex to do what I need?

Not all is easy.

You need all the tools, because Windows dosent provide a dvi visor or a ps visor, then you need download ghostscript (that are free also).


I dunno, but I think MikTex only provides a Yap viewer, i.e some kind of integrated environment for beautiful formulae (maybe I'm wrong though)

See the description by instance:
MiKTeX is an up-to-date TeX implementation for the Windows operating system.

TeX is a typesetting system written by Donald E. Knuth, who says that it is "intended for the creation of beautiful books - and especially for books that contain a lot of mathematics".

MiKTeX offers a complete set of utilities, macro packages and fonts, e.g., LaTeX, pdfTeX, ConTeXt, just to name a few.



In fact, I think that TeXnicCenter use MikTeX like the compiler, ie, texnicenter is only the IDE like there are IDEs for control compilers for programming languages in a nice enviroment, like DEv-cpp use Mingw package, or VS use make, ml and other command line tools.




NOW, with those aclarations, for use miktex, download the minimal installer, about 30Mb, if you need additional packages (aka more things to add), you can use a install center that is provided with miktex and download what you need... and is this one:

Getting updates

Use the update wizard (Start->MiKTeX->MiKTeX Update Wizard) to get the latest package updates.



the ghost script...

GPL Ghostscript 8.50
Posted on Wed, 04 Jan 2006 04:42:00 GMT
http://dojo.miktex.org/blogs/christian_schenk/archive/2006/01/03/247.aspx

that link to: http://sourceforge.net/project/shownotes.php?group_id=1897&release_id=382430

See that is a sf (source forge) page, then the summary of the project is: http://sourceforge.net/projects/ghostscript/ and the home page is http://www.ghostscript.com/





That is all you need:

Core files for TeX (compilation and related things to this process, macros, definitions,...):

1) MikTeX

Viewers:

1) Gostscript and related packages

And an editor for call the above programs:

1) TexniCenter
2) I suguest LyX really (is like WYSIWYG, but not at all, is an WYSIWYM, What You See Is What You Mean, note that because a diferent point of view, switch to it will be extrange XD.





For read a more wide introduction in install and other tools: http://www.miktex.org/Links.aspx see that there is listed texnicenter as a editor... also there is listed Lyx, the one I recommend is more nice I think, really you should try it.

[StatusX]

Thanks for the info. I think TexnicCenter does what I need, and it's pretty simple.

[ksinclair13]

e^{\pi i}+1=0

[Sartak]

f(x) = \left\{\begin{array}{cc}x^2 \sin(\frac{1}{x}),& \mbox{ if } x\neq 0\\0, & \mbox{ if } x=0\end{array}\right

[AKG]

\sum _{k=1} ^{K} \left\lfloor\frac{n}{p^k}\right\rfloor < \frac{n}{p-1}

n\cdot\sum _{k=1} ^{K} \left\lfloor\frac{1}{p^k}\right\rfloor < n\left (\frac{1}{p-1}\right )

\sum _{k=1} ^{K} \left\lfloor\frac{1}{p^k}\right\rfloor < \frac{1}{p-1}

\sum _{k=1} ^{K} \left\lfloor\frac{p^K}{p^k}\right\rfloor < \frac{p^K}{p-1}

p^{K-1} + \dots + 1 < \frac{p^K}{p-1}

(p^{K-1} + \dots + 1)(p-1) < p^K

p^K - 1 < p^K

[twoflower]

\xi^{i} = (a_1\ +\ h_1,\ a_2\ +\ h_2,\ ...\ ,\ a_{i-1}\ +\ h_{i-1},\ a_i\ +\ \vartheta h_i,\ a_{i+1},\ a_{i+2}...,\ a_{n})\mbox{, }\vartheta \in (0,1)



\xi = (a_1 + h_1,\ a_2 + h_2,\ ...\ ,\ a_n + h_n)

[bomba923]

Can someone please tell me the latex code for the little circle which denotes composition of functions?
Do you mean this symbol?

\circ

Just click on my LaTeX code. Here's an example:

f \circ g

[Alteran]

Could any one suggest modern LaTeX to HTML utility for win32 system?
I imagine my visualization of documents as: in HTML there are LaTeX documents(or simply block of LaTeX code) and when displaying it will be transformed to HTML or image and will be visible as normal math (just as on this forum).

[Corneo]

Why is that every time I write a math equation and when I click preview, I can never see the equation. I always just see the message telling me that the graphic is being generated. I have to submit my message first before I can see it. Can anyone please explain.

[VietDao29]

Why is that every time I write a math equation and when I click preview, I can never see the equation. I always just see the message telling me that the graphic is being generated. I have to submit my message first before I can see it. Can anyone please explain.
That's an error with the update, and Greg is working on it.
You can read here (http://www.physicsforums.com/showthread.php?t=105009) :)

[Captain Zappo]

How do I insert a line break? I have read the pdf file explaining the different commands. I have tried the following:

\\
\ \
\\
\ \
\linebreak
\linebreak[4]
\linebreak[0]

and many others. All help would be appreciated.

[VietDao29]

How do I insert a line break? I have read the pdf file explaining the different commands. I have tried the following:

\\
\ \
\\
\ \
\linebreak
\linebreak[4]
\linebreak[0]

and many others. All help would be appreciated.
You may want to try \begin{array} and \end{array} commands.
Click on my LaTeX image to see the code.
\begin{array}{l} \mbox{Text 1} \\ \mbox{Text 2} \\ \frac{x}{2} = \frac{\gamma + \beta}{\varepsilon} \end{array}
This is covered in 3 .PDF files in the first post of this thread.

[michealsmith]

wow i have to ask how do u do that ....(btw thanks alot)

[Perturbation]

Is there a latex command for Feynman diagrams or contractions in QFT (the lines joining operators to denote propogators and things)?

[bomba923]

Hmm...I usually just delete and repost should any
problems with \LaTeX previewing occur :shy:

\mathop {\lim }\limits_{n \to \infty } \bigcup\limits_{i = 0}^{n!} {\left\{ {\frac{i}{{n!}}} \right\}} = \mathbb{Q} \cap \left[ {0,1} \right]

[Hootenanny]

How do you write 3D column vectors in \LaTeX?

[electronic engineer]

In my last post i've written:
v(w)=integral(v(t)*e^-jwt) ; - infinity<t<+infinity

how can i write it using latex?

http://www.physicsforums.com/showthread.php?t=113920
thanks.

[Doc Al]

In my last post i've written:
v(w)=integral(v(t)*e^-jwt) ; - infinity<t<+infinity

how can i write it using latex?

Page through this thread and you'll find several examples of integrals that you can copy.

[robphy]

\]

\unitlength 1mm
\begin{picture}(55,90)(0,0)
\linethickness{0.3mm}
\put(20,10){\line(0,1){80}}
\linethickness{0.3mm}
\multiput(20,90)(0.12,-0.12){250}{\line(1,0){0.12}}
\linethickness{0.3mm}
\multiput(20,30)(0.12,0.12){250}{\line(1,0){0.12}}
\linethickness{0.3mm}
\multiput(20,10)(0.12,0.2){250}{\line(0,1){0.2}}
\put(15,30){\makebox(0,0)[cc]{t}}
\put(15,60){\makebox(0,0)[cc]{\gamma t}}
\put(15,90){\makebox(0,0)[cc]{k^2t}}

\put(55,60){\makebox(0,0)[cc]{kt}}

\end{picture}
\[

[RyanJ]

\]
\unitlength 1mm
\begin{picture}(55, 90)(0, 0)
\linethickness{0.3mm}
\put(20, 10){\line(0,1){80}}
\linethickness{0.3mm}
\multiput(20, 90)(0.12,-0.12){250}{\line(1, 0){0.12}}
\linethickness{0.3mm}
\multiput(20, 10)(0.12,0.2){250}{\line(0, 1){0.2}}
\put(15, 55){\makebox(0, 0)[cc]{c}}
\put(40, 76){\makebox(0, 0)[cc]{a}}
\put(42, 39){\makebox(0, 0)[cc]{b}}
\end{picture}
\[


Woo.. finally looks right :D

c^2 = a^2 + b^2

Ignore this please, messing with the triangle above :D

Cheers,

Ryan Jone

[RyanJ]

\begin{tabular}[t]{|l|ccccc|c|}
\multicolumn{7}{c}{USAMTS Scores Round 1}\\
\hline
Name & \# 1 & \# 2 & \# 3 & \# 4 & \# 5 & Total\\
\hline
John Doe & 5 & 5 & 3 & 2 & 1 & 16\\
Jane Doe & 5 & 5 & 5 & 4 & 5 & 24\\
Richard Feynman & 5 & 5 & 5 & 5 & 5 & 25\\
\hline
\end{tabular}

[electronic engineer]

v(w)=int^{+infty}^{-infty} v(t) \e^{-jwt}, \dt

[Living_Dog]

Hmmm well, I thought I knew how, but now I'm not so sure. I'll have to look around. Maybe Ambitwistor knows a trick to put a command that has been \renew'd back to its default behavior.

Also, I found this pdf of useful mathematical constructs, that goes a bit beyond what we already have:

http://amath.colorado.edu/documentation/LaTeX/Symbols.pdf

- Warren

Thank you!

I was looking for the integral over a closed surface symbol and the list had it: \large \oint .

-LD

[PhilosophyofPhysics]

\Phi_F = \oint \vec{\ F} \cdot \vec{dA}

\oint \vec{\ F} \cdot \vec{ds} = \nu_0 m_c_e_n_c

\oint \vec{\ G} \cdot \vec{dl} = - \frac{d \Phi _F}{dt}



\Phi_G = \oint \vec{\ G} \cdot \vec{dA} = \frac{m_e_n_c}{\gamma _0}

\vec{\ F _f} = m \vec{\ v} \times \vec{F}

\vec{\ F _f} = m_c \vec{\ L} \times \vec{F}

d\vec{\ F} = \frac{\nu _0}{4\pi} \frac{m_c \vec{\ ds} \times \vec{r}}{r^3}

u_G = \frac{1}{2}\gamma _0 G^2

u_F = \frac{F^2}{2\nu _0}

[AKG]

0 < k \leq m < n,\ \ \gcd\left({{n}\choose{k}},{{n}\choose{m}}\right) > 1

{{n}\choose{k}}{{n-k}\choose{m-k}} = {{n}\choose{m}}{{m}\choose{k}}

{{n}\choose{k}} \left| {{n}\choose{m}}{{m}\choose{k}}

\gcd\left({{n}\choose{k}},{{n}\choose{m}}\right) = 1

{{n}\choose{k}} \left| {{m}\choose{k}}

{{n}\choose{k}} > {{m}\choose{k}}

\gcd\left({{n}\choose{k}},{{n}\choose{m}}\right) > 1

[Living_Dog]

The PSPICTURE Environment:
http://www.ursoswald.ch/LaTeXGraphics/pstricks/pstricks.html


NASA Index of LaTeX instructions plus so much more:
http://www.giss.nasa.gov/tools/latex/ltx-2.html

-LD

PS: I tried a few and none of it works here. So I editted the post down to the URLs as an FYI.

[robphy]

\]

\unitlength 1mm
\begin{picture}(55,90)(0,0)
\linethickness{0.3mm}
\put(20,10){\line(0,1){80}}
\linethickness{0.3mm}
\multiput(20,90)(0.12,-0.12){250}{\line(1,0){0.12}}
\linethickness{0.3mm}
\multiput(20,30)(0.12,0.12){250}{\line(1,0){0.12}}
\linethickness{0.3mm}
\multiput(20,10)(0.12,0.2){250}{\line(0,1){0.2}}
\put(15,30){\makebox(0,0)[cc]{t}}
\put(15,60){\makebox(0,0)[cc]{\gamma t}}
\put(15,90){\makebox(0,0)[cc]{k^2t}}

\put(55,60){\makebox(0,0)[cc]{kt}}

\end{picture}
\[



Let me try...


\]
\usepackage{pstricks, pstcol, pst-text}

\begin{pspicture}(-4, -3.2)(3, 0.2)
\psset{linecolor=white} % hidden
\pstextpath
{\pscurve(-4, -2)(-2, 0)(0, -3)(2, -1)%
(3, -2)(5, -3)}
{\color{blue} % font color
If you want to type
$(a+b)^n=\sum_{k=0}^n {n\choose k}
a^{n-k}b^k$ and let it follow along
a curving line \ldots}
\end{pspicture}
\[

I think the problem is that a line like
"\usepackage{pstricks, pstcol, pst-text}"
may call packages that are unavailable to this system... or maybe it's that this line must come before the \begin{document} line, which we wouldn't have access to.

I think you'll just have to make do with the picture environment.
But one can get it to do some interesting stuff...
for example, http://physicsforums.com/showpost.php?p=261562&postcount=300

[Perturbation]

Is there a latex command for Feynman diagrams or contractions in QFT (the lines joining operators to denote propogators and things)?

Anyone? They would be kinda useful.

[Greg Bernhardt]

latex

trwegfdgdfgfd

[Greg Bernhardt]

latex

fsdagdfgsdgf

[chroot]

E=mc^6

- Warren

[chroot]

\begin{gathered}
\varepsilon _x = \bar \varepsilon _x = \frac{{d^2 }}
{{12}}\left( {M^2 - 1} \right) \hfill \\
d = \sqrt {\frac{{12\bar \varepsilon _x }}
{{M^2 - 1}}} \hfill \\
M = \sqrt {\frac{{12\bar \varepsilon _x }}
{{d^2 }} + 1} \hfill \\
\end{gathered}


LaTeX is functional again.

- Warren

[dav2008]

What's up with the white background?

[robphy]

\] \unitlength 1mm \begin{picture}(55,90)(0,0) \linethickness{0.3mm} \put(20,10){\line(0,1){80}} \linethickness{0.3mm} \multiput(20,90)(0.12,-0.12){250}{\line(1,0){0.12}} \linethickness{0.3mm} \multiput(20,30)(0.12,0.12){250}{\line(1,0){0.12}} \linethickness{0.3mm} \multiput(20,10)(0.12,0.2){250}{\line(0,1){0.2}} \put(15,30){\makebox(0,0)[cc]{t}} \put(15,60){\makebox(0,0)[cc]{\gamma t}} \put(15,90){\makebox(0,0)[cc]{k^2t}} \put(55,60){\makebox(0,0)[cc]{kt}} \end{picture} \[

\mbox{transparency gone?} with tex

\mbox{transparency gone?} with latex

\mbox{transparency gone?} with itex

preview working?:frown:

[bomba923]

\begin{gathered}
{\text{CH}}_4 + 2{\text{O}}_2 \to {\text{CO}}_2 + 2{\text{H}}_2 {\text{O}} \hfill \\
2{\text{C}}_2 {\text{H}}_6 + 7{\text{O}}_2 \to 4{\text{CO}}_2 + 6{\text{H}}_2 {\text{O}} \hfill \\
2{\text{C}}_2 {\text{H}}_4 + 3{\text{O}}_2 \to 2{\text{CO}}_2 + 2{\text{H}}_2 {\text{O}} \hfill \\
2{\text{C}}_2 {\text{H}}_2 + 5{\text{O}}_2 \to 4{\text{CO}}_2 + 2{\text{H}}_2 {\text{O}} \hfill \\
\end{gathered}

[Hootenanny]

\LaTeX

-White Background :grumpy: ????????

[Doc Al]

Testing....

\vec{F} = m \vec{a}

white background? Blech! :yuck:

[Doc Al]

In line testing \vec{F} = m \vec{a}

[robphy]

re-test of an old example




\begin{align}
x& = y && \text{def}\\
& = y+\textcolor{blue}{(y-y)} && \text{add \textcolor{blue}{zero}}\\
& = 2y-y && \text {\textcolor{red}{algebra}}
\end{align}




very plain text, slightlyfanciertext, loud text


\]

\begin{picture}(200,200)(0,0)\multiput(0,0)(40,10) {5}{\line(1,4){40}}\multiput( 0,0)(10,40){5}{\line(4,1){160}}
\put(0,0){\vector(1,4){170}}
\put(50,50){\circle*{10}}



\put(160,40){\framebox(80,40)[r]{ \textcolor{blue}{\bf \[ x_{Bob} \] } } }
\put(40,160){\textcolor{yellow}{\dashbox(80,40)[t]{ \textcolor{red}{ \[ t_{Bob} \] } } }}

\qbezier(100,100)(200,100)(200,200)
\linethickness{8pt}
\textcolor{green}{\qbezier(0,0)(0,100)(100,100)}
\linethickness{1pt}
\qbezier(0,0)(0,100)(100,100)

\end{picture}
\[





\newcommand{\VARTEXT}[2][\scriptsize]{\left(\mbox{#1\begin{tabular}{c}#2\end{tabular}}\ right)}



\VARTEXT[\large]{net-work done \\ on the object }
=
\VARTEXT[\large]{change in \\ the kinetic energy \\ of the object }



Transparency broken?

[VietDao29]

I am not familiar with drawing in LaTeX, and I just wonder where I can find a short tutorial on this topic.
I think it should also be added to the first page of this thread, so that someone new to LaTeX can learn how to draw.
It's just my $0.02.

[robphy]

I don't know of anyone else who uses this \picture environment here at PF. For general (i.e. not-necessarily PF) LaTeX, you might look at http://www.eng.cam.ac.uk/help/tpl/textprocessing/teTeX/latex/latex2e-html/ltx-43.html

Here what I use sometimes http://jpicedt.sourceforge.net/
With some effort (see example below [click on image for source]) and some manual tweaks, you can get its output into a PF post.


\]
\unitlength 1mm
\begin{picture}(55,90)(0,0)
\linethickness{0.3mm}
\put(20,10){\line(0,1){80}}
\linethickness{0.3mm}
\multiput(20,90)(0.12,-0.12){250}{\line(1,0){0.12}}
\linethickness{0.3mm}
\multiput(20,30)(0.12,0.12){250}{\line(1,0){0.12}}
\linethickness{0.3mm}
\multiput(20,10)(0.12,0.2){250}{\line(0,1){0.2}}
\put(15,30){\makebox(0,0)[cc]{t}}
\put(15,60){\makebox(0,0)[cc]{\gamma t}}
\put(15,90){\makebox(0,0)[cc]{k^2t}}
\put(55,60){\makebox(0,0)[cc]{kt}}
\end{picture}
\[

[chroot]

\]
\unitlength 1mm
\begin{picture}(55,90)(0,0)
\linethickness{0.3mm}
\put(20,10){\line(0,1){80}}
\linethickness{0.3mm}
\multiput(20,90)(0.12,-0.12){250}{\line(1,0){0.12}}
\linethickness{0.3mm}
\multiput(20,30)(0.12,0.12){250}{\line(1,0){0.12}}
\linethickness{0.3mm}
\multiput(20,10)(0.12,0.2){250}{\line(0,1){0.2}}
\put(15,30){\makebox(0,0)[cc]{t}}
\put(15,60){\makebox(0,0)[cc]{\gamma t}}
\put(15,90){\makebox(0,0)[cc]{k^2t}}
\put(55,60){\makebox(0,0)[cc]{kt}}
\end{picture}
\[


Testing transparency.. 13

- Warren

[chroot]

\]
\unitlength 1mm
\begin{picture}(55,90)(0,0)
\linethickness{0.3mm}
\put(20,10){\line(0,1){80}}
\linethickness{0.3mm}
\multiput(20,90)(0.12,-0.12){250}{\line(1,0){0.12}}
\linethickness{0.3mm}
\multiput(20,30)(0.12,0.12){250}{\line(1,0){0.12}}
\linethickness{0.3mm}
\multiput(20,10)(0.12,0.2){250}{\line(0,1){0.2}}
\put(15,30){\makebox(0,0)[cc]{t}}
\put(15,60){\makebox(0,0)[cc]{\gamma t}}
\put(15,90){\makebox(0,0)[cc]{k^2t}}
\put(55,60){\makebox(0,0)[cc]{kt}}
\end{picture}
\[



\]
\unitlength 1mm
\begin{picture}(55,90)(0,0)
\linethickness{0.3mm}
\put(20,10){\line(0,1){80}}
\linethickness{0.3mm}
\multiput(20,90)(0.12,-0.12){250}{\line(1,0){0.12}}
\linethickness{0.3mm}
\multiput(20,30)(0.12,0.12){250}{\line(1,0){0.12}}
\linethickness{0.3mm}
\multiput(20,10)(0.12,0.2){250}{\line(0,1){0.2}}
\put(15,30){\makebox(0,0)[cc]{t}}
\put(15,60){\makebox(0,0)[cc]{\gamma t}}
\put(15,90){\makebox(0,0)[cc]{k^2t}}
\put(55,60){\makebox(0,0)[cc]{kt}}
\end{picture}
\[


Testing transparency.. 53

- Warren

[robphy]

Are you setting a transparency flag?
Or are you trying to explicitly match the current skin background (for Prime, apparently, RGB: 233,233,233), which is different from the quote background (for Prime, apparently, RGB 216,233,228)?

[chroot]

I'm calling pnmtopng with -transparency =rgb:ff/ff/ff, which should turn all the white pixels transparent (and the latex itself forces an #ffffff background). It works if I don't use antialiasing when calling ghostscript, but, for some reason, turning antialiasing on screws pnmtopng up. It didn't do this in previous versions, so it's likely a bug in the newest versions. (We're on a brand new server now). I'm working on finding a workaround.

- Warren

[chroot]

0 < k \leq m < n,\ \ \gcd\left({{n}\choose{k}},{{n}\choose{m}}\right) > 1

{{n}\choose{k}}{{n-k}\choose{m-k}} = {{n}\choose{m}}{{m}\choose{k}}

{{n}\choose{k}} \left| {{n}\choose{m}}{{m}\choose{k}}

\gcd\left({{n}\choose{k}},{{n}\choose{m}}\right) = 1

{{n}\choose{k}} \left| {{m}\choose{k}}

{{n}\choose{k}} > {{m}\choose{k}}

\gcd\left({{n}\choose{k}},{{n}\choose{m}}\right) > 1

Another test...

- Warren

[chroot]

Another test of aliasing... 8


e^x = \sum_{n=0}^\infty \frac{x^n}{n!} = \lim_{n\rightarrow\infty} (1+x/n)^n


- Warren

[chroot]

Transparency's fixed (found a workaround) but the antialiasing routine used by ghostscript is different now, and, in my opinion, not as nice looking. I'm going to have to keep playing with that.

- Warren

[robphy]

Looks better. Thanks.

http://www.theiling.de/projects/transparency.html useful?
(By the way, when this gets fixed, can the pstricks (http://tug.org/PSTricks/) package be included?)

[dav2008]

Transparency's fixed (found a workaround) but the antialiasing routine used by ghostscript is different now, and, in my opinion, not as nice looking. I'm going to have to keep playing with that.

- WarrenWhy doesn't the old tex work?

[chroot]

We're on a new server with an entirely different Linux distribution. Apparently, people have made a lot of (annoying) changes to some of the basic image-manipulation programs in the last year or so, and I'm having to figure out how to get around them. Apparently the transparency is still not working in IE.

- Warren

[robphy]

I wonder if that IE problem has anything to do with
http://entropymine.com/jason/testbed/pngtrans/ (try viewing in IE and FF)
By the way, the images "copied" off the webpage (via right-click) differ between doing that in IE and in FF.

The new images have fonts that seem a little thinner (compared to the earlier version)... as if more pixels were selected for transparency than before.

[chroot]

robphy,

As I mentioned, the antialiasing done by ghostscript appears to be different now than it used to be. As I said, I prefer the old look, and am going to try to make it look a little better soon. Apparently quite a bit of stuff was changed. :frown:

- Warren

[chroot]

I wonder if that IE problem has anything to do with
http://entropymine.com/jason/testbed/pngtrans/ (try viewing in IE and FF)

Yeah, that's a good page. IE certainly does have lots of problems with PNG transparency, but my images here used to work just fine under both browsers. This is going to drive me insane.

- Warren

[chroot]

Another test of aliasing... 9


e^x = \sum_{n=0}^\infty \frac{x^n}{n!} = \lim_{n\rightarrow\infty} (1+x/n)^n


- Warren


e^x = \sum_{n=0}^\infty \frac{x^n}{n!} = \lim_{n\rightarrow\infty} (1+x/n)^n



- Warren

[bomba923]

\mathop {\lim }\limits_{n \to \infty } \bigcup\limits_{i = 0}^{n!} {\left\{ {\frac{i}{{n!}}} \right\}} = \mathbb{Q} \cap \left[ {0,1} \right]

[Kazza_765]

Testing.........


E_n = /frac{n^2/pi^2}{(L+2/delta)^2}


Hmm, does anyone know why I can view Latex graphics in other peoples posts, but I can never view them in my own. I always get the please wait the graphic is being generated message.

[robphy]

E_n = \frac{n^2\pi^2}{(L+2\delta)^2}.


Your slashes are backwards.
And I believe the tags have to be lowercase.

Testing.........


E_n = /frac{n^2/pi^2}{(L+2/delta)^2}


Hmm, does anyone know why I can view Latex graphics in other peoples posts, but I can never view them in my own. I always get
the please wait the graphic is being generated message.

[rbj]

lemme try:


E_n = \frac{n^2 \pi^2}{(L + 2 \delta)^2}

[robphy]

E_n = \frac{n^2 \pi^2}{(L + 2 \delta)^2}

Yes, a slight improvement. (The gamma modification?)

[Doc Al]

E_n = \frac{n^2 \pi^2}{(L + 2 \delta)^2}


Testing \vec{F} = m \vec{a}

Yikes... worse than ever. :cry:

[robphy]

Testing \vec{F} = m \vec{a}

Yikes... worse than ever. :cry:

Using IE?
Transparency seems okay in Firefox (1.0.7).

[Hootenanny]

\fbox{\LaTeX}

[Doc Al]

Testing \vec{F} = m \vec{a}

Yikes... worse than ever. :cry:
Seems to be working now; it wasn't yesterday when I posted that.

Yes, I'm using IE.

[Hootenanny]

Somethings wrong with the AA again :frown:

V = \int \pi \left[ f(x) \right]^2

I'm using firefox.

[-Job-]

I've had trouble with .png transparency in IE before. The only way i got around that was by using transparent .gifs. I know MimeTex (http://www.forkosh.dreamhost.com/source_mimetex.html#introduction) converts to .gif, but it's not my favorite converter as it doesn't use very smooth (vector?) characters but it takes in Latex at the command line directly, rather than reading from a file which i found very useful. An alternative would be to set the background color to the background color of these forums, but since you have different styles for the PF layout that might not work. Sounds like a pain. :smile:

Actually, i just found out MimeTex (http://www.forkosh.dreamhost.com/source_mimetex.html#introduction) can be compiled with anti-aliasing on.

[robphy]

robphy,

As I mentioned, the antialiasing done by ghostscript appears to be different now than it used to be. As I said, I prefer the old look, and am going to try to make it look a little better soon. Apparently quite a bit of stuff was changed. :frown:

- Warren

What version of Ghostscript? What version and distro of linux?
From googling, these commandline options might worth playing with:

-dTextAlphaBits=4 -dGraphicsAlphaBits=4 -dNOPLATFONTS

...just a thought.

[pervect]

\[

\unitlength 1mm
\begin{picture}(85.00,95.00)(0,0)

\linethickness{0.15mm}
\put(20.00,0.00){\line(0,1){90.00}}


\linethickness{0.15mm}
\put(20.00,90.00){\line(0,1){0.12}}

\linethickness{0.15mm}
\put(20.00,90.12){\line(0,1){0.12}}
\put(20.00,90.24){\vector(0,1){0.12}}

\linethickness{0.15mm}
\multiput(65.12,90.24)(0.12,0.24){1}{\line(0,1){0. 24}}
\put(65.24,90.48){\vector(1,2){0.12}}

\linethickness{0.15mm}
\multiput(40.12,40.12)(0.12,0.12){1}{\line(1,0){0. 12}}
\put(40.24,40.24){\vector(1,1){0.12}}

\linethickness{0.15mm}
\multiput(60.12,80.12)(0.12,0.12){1}{\line(0,1){0. 12}}
\put(60.24,80.24){\vector(1,1){0.12}}


\linethickness{0.15mm}
\multiput(20.00,0.00)(0.12,0.24){375}{\line(0,1){0 .24}}
\put(65.00,90.00){\vector(1,2){0.12}}


\linethickness{0.15mm}
\multiput(20.00,20.00)(0.12,0.12){167}{\line(1,0){ 0.12}}
\put(40.00,40.00){\vector(1,1){0.12}}

\linethickness{0.15mm}
\multiput(20.00,40.00)(0.12,0.12){333}{\line(1,0){ 0.12}}
\put(60.00,80.00){\vector(1,1){0.12}}

\put(20.00,0.00){\makebox(0,0)[cr]{O\,}}

\put(20.00,20.00){\makebox(0,0)[cr]{A\,}}

\put(40.00,40.00){\makebox(0,0)[cl]{\,B}}

\put(20.00,40.00){\makebox(0,0)[cr]{C\,}}

\put(60.00,80.00){\makebox(0,0)[cl]{\,D}}

\put(20.00,92.00){\makebox(0,0)[bc]{T axis}}

\put(65.00,92.00){\makebox(0,0)[bc]{T' axis}}

\put(20.00,20.00){\makebox(0,0)[tl]{\beta}}

\put(20.00,40.00){\makebox(0,0)[tl]{\beta}}

\end{picture}

\]

[pervect]

\[

\unitlength 1mm
\begin{picture}(85.00,95.00)(0,0)

\linethickness{0.15mm}
\put(20.00,0.00){\line(0,1){90.00}}


\linethickness{0.15mm}
\put(20.00,90.00){\line(0,1){0.12}}

\linethickness{0.15mm}
\put(20.00,90.12){\line(0,1){0.12}}
\put(20.00,90.24){\vector(0,1){0.12}}

\linethickness{0.15mm}
\multiput(65.12,90.24)(0.12,0.24){1}{\line(0,1){0. 24}}
\put(65.24,90.48){\vector(1,2){0.12}}

\linethickness{0.15mm}
\multiput(40.12,40.12)(0.12,0.12){1}{\line(1,0){0. 12}}
\put(40.24,40.24){\vector(1,1){0.12}}

\linethickness{0.15mm}
\multiput(60.12,80.12)(0.12,0.12){1}{\line(0,1){0. 12}}
\put(60.24,80.24){\vector(1,1){0.12}}


\linethickness{0.15mm}
\multiput(20.00,0.00)(0.12,0.24){375}{\line(0,1){0 .24}}
\put(65.00,90.00){\vector(1,2){0.12}}


\linethickness{0.15mm}
\multiput(20.00,20.00)(0.12,0.12){167}{\line(1,0){ 0.12}}
\put(40.00,40.00){\vector(1,1){0.12}}

\linethickness{0.15mm}
\multiput(20.00,40.00)(0.12,0.12){333}{\line(1,0){ 0.12}}
\put(60.00,80.00){\vector(1,1){0.12}}

\put(20.00,0.00){\makebox(0,0)[cr]{O\,}}

\put(20.00,20.00){\makebox(0,0)[cr]{A\,}}

\put(40.00,40.00){\makebox(0,0)[cl]{\,B}}

\put(20.00,40.00){\makebox(0,0)[cr]{C\,}}

\put(60.00,80.00){\makebox(0,0)[cl]{\,D}}

\put(20.00,92.00){\makebox(0,0)[bc]{T axis}}

\put(65.00,92.00){\makebox(0,0)[bc]{T' axis}}

\put(20.00,20.00){\makebox(0,0)[tl]{\beta}}

\put(20.00,40.00){\makebox(0,0)[tl]{\beta}}

\put(20.00,7.00){\makebox(0,0)[bl]{$\alpha$}}

\end{picture}

\]

[pervect]

So, I just want to stick an "alpha" in the angle by the point marked O, why is the Latex source for this image invalid?

[dav2008]

Is there something I'm doing with wrong trying to get a line break?


a \\ b



a \ \ b

a \ \
b


Obviously the following works but it can get annoying

a
b

[robphy]

\[

\unitlength 1mm
\begin{picture}(85.00,95.00)(0,0)

\linethickness{0.15mm}
\put(20.00,0.00){\line(0,1){90.00}}


\linethickness{0.15mm}
\put(20.00,90.00){\line(0,1){0.12}}

\linethickness{0.15mm}
\put(20.00,90.12){\line(0,1){0.12}}
\put(20.00,90.24){\vector(0,1){0.12}}

\linethickness{0.15mm}
\multiput(65.12,90.24)(0.12,0.24){1}{\line(0,1){0. 24}}
\put(65.24,90.48){\vector(1,2){0.12}}

\linethickness{0.15mm}
\multiput(40.12,40.12)(0.12,0.12){1}{\line(1,0){0. 12}}
\put(40.24,40.24){\vector(1,1){0.12}}

\linethickness{0.15mm}
\multiput(60.12,80.12)(0.12,0.12){1}{\line(0,1){0. 12}}
\put(60.24,80.24){\vector(1,1){0.12}}


\linethickness{0.15mm}
\multiput(20.00,0.00)(0.12,0.24){375}{\line(0,1){0 .24}}
\put(65.00,90.00){\vector(1,2){0.12}}


\linethickness{0.15mm}
\multiput(20.00,20.00)(0.12,0.12){167}{\line(1,0){ 0.12}}
\put(40.00,40.00){\vector(1,1){0.12}}

\linethickness{0.15mm}
\multiput(20.00,40.00)(0.12,0.12){333}{\line(1,0){ 0.12}}
\put(60.00,80.00){\vector(1,1){0.12}}

\put(20.00,0.00){\makebox(0,0)[cr]{O\,}}

\put(20.00,20.00){\makebox(0,0)[cr]{A\,}}

\put(40.00,40.00){\makebox(0,0)[cl]{\,B}}

\put(20.00,40.00){\makebox(0,0)[cr]{C\,}}

\put(60.00,80.00){\makebox(0,0)[cl]{\,D}}

\put(20.00,92.00){\makebox(0,0)[bc]{T axis}}

\put(65.00,92.00){\makebox(0,0)[bc]{T' axis}}

\put(20.00,20.00){\makebox(0,0)[tl]{\beta}}

\put(20.00,40.00){\makebox(0,0)[tl]{\beta}}

\put(0.00,5.00){\makebox(0,0)[bl]{\alpha}}

\end{picture}

\]





\[

\unitlength 1mm
\begin{picture}(85.00,95.00)(0,0)

\linethickness{0.15mm}
\put(20.00,0.00){\line(0,1){90.00}}


\linethickness{0.15mm}
\put(20.00,90.00){\line(0,1){0.12}}

\linethickness{0.15mm}
\put(20.00,90.12){\line(0,1){0.12}}
\put(20.00,90.24){\vector(0,1){0.12}}

\linethickness{0.15mm}
\multiput(65.12,90.24)(0.12,0.24){1}{\line(0,1){0. 24}}
\put(65.24,90.48){\vector(1,2){0.12}}

\linethickness{0.15mm}
\multiput(40.12,40.12)(0.12,0.12){1}{\line(1,0){0. 12}}
\put(40.24,40.24){\vector(1,1){0.12}}

\linethickness{0.15mm}
\multiput(60.12,80.12)(0.12,0.12){1}{\line(0,1){0. 12}}
\put(60.24,80.24){\vector(1,1){0.12}}


\linethickness{0.15mm}
\multiput(20.00,0.00)(0.12,0.24){375}{\line(0,1){0 .24}}
\put(65.00,90.00){\vector(1,2){0.12}}


\linethickness{0.15mm}
\multiput(20.00,20.00)(0.12,0.12){167}{\line(1,0){ 0.12}}
\put(40.00,40.00){\vector(1,1){0.12}}

\linethickness{0.15mm}
\multiput(20.00,40.00)(0.12,0.12){333}{\line(1,0){ 0.12}}
\put(60.00,80.00){\vector(1,1){0.12}}

\put(20.00,0.00){\makebox(0,0)[cr]{O\,}}

\put(20.00,20.00){\makebox(0,0)[cr]{A\,}}

\put(40.00,40.00){\makebox(0,0)[cl]{\,B}}

\put(20.00,40.00){\makebox(0,0)[cr]{C\,}}

\put(60.00,80.00){\makebox(0,0)[cl]{\,D}}

\put(20.00,92.00){\makebox(0,0)[bc]{T axis}}

\put(65.00,92.00){\makebox(0,0)[bc]{T' axis}}

\put(20.00,20.00){\makebox(0,0)[tl]{$\beta$}}

\put(20.00,40.00){\makebox(0,0)[tl]{$\beta$}}

\put(0.00,5.00){\makebox(0,0)[bl]{$\alpha$}}

\end{picture}

\]



The use of \[ and \] I've always used in the \picture environment here
let me use the standard tags $\alpha$ for math symbols. I found this out by trial and error.

[robphy]

Is there something I'm doing with wrong trying to get a line break?


a \\ b



a \ \ b

a \ \
b



maybe we're in an mbox?
\begin{align*} a \\ b \end{align*}

\] a \\ b \[

\] $ a \\ b $ \[

From these last two posts, it seems one has more familiar control using
[ tex ] \] a \\ b \[ [ /tex ]
instead of the usual
[ tex ] a \\ b [ /tex ]

Did I mention that I really like \LaTeX? :tongue2:
(That's why I'm saddened :cry: that the preview mode is broken o:) .)

[Hyperreality]

Just an aside, for those who'd like to have LaTeX on their computer http://http://www.artofproblemsolving.com/LaTeX/AoPS_L_Downloads.phpis the place to get it! The whole package is about 400MB.

[JonF]

0<|x-x_0| <\delta => |sin(x) - sin(x_0)|< \epsilon
|sin(x)| - |sin(x_0)|<|sin(x) - sin(x_0)|<\epsilon
|sin(x)| - |x| < |sin(x)| - |sin(x_0)|< \epsilon

[dav2008]

Fixed link: http://www.artofproblemsolving.com/LaTeX/AoPS_L_Downloads.php
maybe we're in an mbox?
\begin{align*} a \\ b \end{align*}

\] a \\ b \[

\] $ a \\ b $ \[

From these last two posts, it seems one has more familiar control using
[ tex ] \] a \\ b \[ [ /tex ]
instead of the usual
[ tex ] a \\ b [ /tex ]

Did I mention that I really like \LaTeX? :tongue2:
(That's why I'm saddened :cry: that the preview mode is broken o:) .)
hmm ok thanks.

[renatzu]

d\vec{B} = \frac{\mu_0}{4\pi}(\frac{Id\vec{s}\times\hat{r}}{r ^2})

\int B \cdot ds = \mu_0 I

B = \frac {\mu_0 * 2A}{4 * 2 \pi * .08 m }

F = \frac {2 k_m I_1 I_2 l}{d}

[-Job-]

Miktex has all kinds of packages available for download. In order to use these packages must i specifically indicate which to use in the latex code or is there an option to just use all available?

[matt grime]

You won't want to use all available. It is unnecessary and there are package conflicts. You cannot use xypic with Paul Taylor's diagrams package for instance. Plus there are some packages that require their own
\usepackage

command and yet others must appear after other packages in the preamble as well.

[himanshu121]

T_1 - T_2 = 2k(r\theta -1)

[himanshu121]

T_1 - T_2 = m \frac{d^2}{dt^2} y

[himanshu121]

T_1-T_2=m \frac{d^2 y}{dt^2}
T_m=\frac{K_mv_2}{R}
T_m=J\frac{d^2\theta}{dt^2}+b\frac{d\theta}{dt}+r( T_1 - T_2)
state variables are
4=\frac{dy}{dt}x_1=\theta , x_2=y , x_3=\frac{d\theta}{dt} , x_

[dav2008]

I installed miketex and TeXnicCenter. How do I have to format the new entry in TeXnicCenter to get it to work? On the forums it's just asadasda.

Edit: NM found the short tutorial on that webpage.

Is there a way to export to jpg?

[-Job-]

Dav, for that you might need some other tool. I know you can convert to PNG and GIF, but neither through TeXnic Center. To convert to png i first convert to dvi and then use the dvipng.exe tool to convert the dvi to a png. To convert to .gif there is a tool called MimeTex. This whole LateX scene is very confusing i think. That's why i'm doing a web based editor that can export/preview as a png, gif, or html.
It's still under construction but it's already usable:
http://www.bloo.us/academic/latex/

I'm actually having some issues implementing the formatting tags in my program. Maybe someone experienced can tell me why the tags:
\tiny
\scriptsize
\footnotesize
\small
\normalsize
\large
\Large
\LARGE
\huge
\Huge
... are not parsed correctly with latex.exe (generate an error). Do i need to use a specific package? Which one?

[dav2008]

Dav, for that you might need some other tool. I know you can convert to PNG and GIF, but neither through TeXnic Center. To convert to png i first convert to dvi and then use the dvipng.exe tool to convert the dvi to a png. To convert to .gif there is a tool called MimeTex. This whole LateX scene is very confusing i think. That's why i'm doing a web based editor that can export/preview as a png, gif, or html.
It's still under construction but it's already usable:
http://www.bloo.us/academic/latex/

Thanks I'll check out that link.

I mean what I do now is just preview the file, screen capture, paste into PS, crop and save as jpg. I think that web-utility might be a bit more useful for my purposes, if I just want to make a quick jpg.

[matt grime]

There are solutions, depending on your OS, to these problems.

1. If in OS X you have latexit.
2. Use latex2html in any system.
3. Stop using anything but a text editor for latex and buy yourself a copy of Kopka and Daly, you'll be far more productive.

[robphy]

\]
\unitlength 0.02mm
\begin{picture}(400,3000)(0,0)

\textcolor{red}{
\linethickness{3pt}
\qbezier( 6110, 1946 )( 6230, 1948 )( 6230, 1948 )
\qbezier( 5998, 1939 )( 6110, 1946 )( 6110, 1946 )
\qbezier( 5881, 1928 )( 5998, 1939 )( 5998, 1939 )
\qbezier( 5771, 1916 )( 5881, 1928 )( 5881, 1928 )
\qbezier( 5648, 1905 )( 5771, 1916 )( 5771, 1916 )
\qbezier( 5541, 1900 )( 5648, 1905 )( 5648, 1905 )
\qbezier( 5425, 1903 )( 5541, 1900 )( 5541, 1900 )
\qbezier( 5307, 1916 )( 5425, 1903 )( 5425, 1903 )
\qbezier( 5193, 1936 )( 5307, 1916 )( 5307, 1916 )
\qbezier( 5073, 1960 )( 5193, 1936 )( 5193, 1936 )
\qbezier( 4959, 1980 )( 5073, 1960 )( 5073, 1960 )
\qbezier( 4843, 1990 )( 4959, 1980 )( 4959, 1980 )
\qbezier( 4731, 1984 )( 4843, 1990 )( 4843, 1990 )
\qbezier( 4613, 1961 )( 4731, 1984 )( 4731, 1984 )
\qbezier( 4505, 1926 )( 4613, 1961 )( 4613, 1961 )
\qbezier( 4385, 1881 )( 4505, 1926 )( 4505, 1926 )
\qbezier( 4273, 1843 )( 4385, 1881 )( 4385, 1881 )
\qbezier( 4211, 1829 )( 4273, 1843 )( 4273, 1843 )
\qbezier( 4148, 1822 )( 4211, 1829 )( 4211, 1829 )
\qbezier( 4092, 1823 )( 4148, 1822 )( 4148, 1822 )
\qbezier( 4036, 1832 )( 4092, 1823 )( 4092, 1823 )
\qbezier( 3978, 1849 )( 4036, 1832 )( 4036, 1832 )
\qbezier( 3920, 1874 )( 3978, 1849 )( 3978, 1849 )
\qbezier( 3801, 1946 )( 3920, 1874 )( 3920, 1874 )
\qbezier( 3687, 2028 )( 3801, 1946 )( 3801, 1946 )
\qbezier( 3580, 2095 )( 3687, 2028 )( 3687, 2028 )
\qbezier( 3519, 2121 )( 3580, 2095 )( 3580, 2095 )
\qbezier( 3458, 2135 )( 3519, 2121 )( 3519, 2121 )
\qbezier( 3429, 2137 )( 3458, 2135 )( 3458, 2135 )
\qbezier( 3399, 2135 )( 3429, 2137 )( 3429, 2137 )
\qbezier( 3370, 2128 )( 3399, 2135 )( 3399, 2135 )
\qbezier( 3341, 2118 )( 3370, 2128 )( 3370, 2128 )
\qbezier( 3286, 2088 )( 3341, 2118 )( 3341, 2118 )
\qbezier( 3232, 2045 )( 3286, 2088 )( 3286, 2088 )
\qbezier( 3113, 1913 )( 3232, 2045 )( 3232, 2045 )
\qbezier( 2999, 1761 )( 3113, 1913 )( 3113, 1913 )
\qbezier( 2880, 1621 )( 2999, 1761 )( 2999, 1761 )
\qbezier( 2825, 1576 )( 2880, 1621 )( 2880, 1621 )
\qbezier( 2771, 1551 )( 2825, 1576 )( 2825, 1576 )
\qbezier( 2756, 1547 )( 2771, 1551 )( 2771, 1551 )
\qbezier( 2740, 1546 )( 2756, 1547 )( 2756, 1547 )
\qbezier( 2725, 1546 )( 2740, 1546 )( 2740, 1546 )
\qbezier( 2709, 1549 )( 2725, 1546 )( 2725, 1546 )
\qbezier( 2679, 1559 )( 2709, 1549 )( 2709, 1549 )
\qbezier( 2648, 1579 )( 2679, 1559 )( 2679, 1559 )
\qbezier( 2595, 1631 )( 2648, 1579 )( 2648, 1579 )
\qbezier( 2542, 1707 )( 2595, 1631 )( 2595, 1631 )
\qbezier( 2417, 1965 )( 2542, 1707 )( 2542, 1707 )
\qbezier( 2312, 2227 )( 2417, 1965 )( 2417, 1965 )
\qbezier( 2197, 2489 )( 2312, 2227 )( 2312, 2227 )
\qbezier( 2137, 2587 )( 2197, 2489 )( 2197, 2489 )
\qbezier( 2077, 2644 )( 2137, 2587 )( 2137, 2587 )
\qbezier( 2062, 2650 )( 2077, 2644 )( 2077, 2644 )
\qbezier( 2047, 2654 )( 2062, 2650 )( 2062, 2650 )
\qbezier( 2032, 2654 )( 2047, 2654 )( 2047, 2654 )
\qbezier( 2017, 2650 )( 2032, 2654 )( 2032, 2654 )
\qbezier( 1987, 2632 )( 2017, 2650 )( 2017, 2650 )
\qbezier( 1957, 2600 )( 1987, 2632 )( 1987, 2632 )
\qbezier( 1904, 2506 )( 1957, 2600 )( 1957, 2600 )
\qbezier( 1851, 2367 )( 1904, 2506 )( 1904, 2506 )
\qbezier( 1791, 2159 )( 1851, 2367 )( 1851, 2367 )
\qbezier( 1731, 1910 )( 1791, 2159 )( 1791, 2159 )
\qbezier( 1672, 1641 )( 1731, 1910 )( 1731, 1910 )
\qbezier( 1614, 1364 )( 1672, 1641 )( 1672, 1641 )
\qbezier( 1555, 1099 )( 1614, 1364 )( 1614, 1364 )
\qbezier( 1496, 868 )( 1555, 1099 )( 1555, 1099 )
\qbezier( 1439, 698 )( 1496, 868 )( 1496, 868 )
\qbezier( 1383, 597 )( 1439, 698 )( 1439, 698 )
\qbezier( 1369, 585 )( 1383, 597 )( 1383, 597 )
\qbezier( 1355, 578 )( 1369, 585 )( 1369, 585 )
\qbezier( 1342, 576 )( 1355, 578 )( 1355, 578 )
\qbezier( 1328, 580 )( 1342, 576 )( 1342, 576 )
\qbezier( 1300, 604 )( 1328, 580 )( 1328, 580 )
\qbezier( 1273, 651 )( 1300, 604 )( 1300, 604 )
\qbezier( 1214, 832 )( 1273, 651 )( 1273, 651 )
\qbezier( 1155, 1119 )( 1214, 832 )( 1214, 832 )
\qbezier( 1125, 1300 )( 1155, 1119 )( 1155, 1119 )
\qbezier( 1095, 1503 )( 1125, 1300 )( 1125, 1300 )
\qbezier( 1065, 1726 )( 1095, 1503 )( 1095, 1503 )
\qbezier( 1036, 1965 )( 1065, 1726 )( 1065, 1726 )
\qbezier( 1006, 2215 )( 1036, 1965 )( 1036, 1965 )
\qbezier( 977, 2473 )( 1006, 2215 )( 1006, 2215 )
\qbezier( 947, 2735 )( 977, 2473 )( 977, 2473 )
\qbezier( 918, 2996 )( 947, 2735 )( 947, 2735 )
\qbezier( 891, 3223 )( 918, 2996 )( 918, 2996 )
\qbezier( 865, 3442 )( 891, 3223 )( 891, 3223 )
\qbezier( 839, 3649 )( 865, 3442 )( 865, 3442 )
\qbezier( 813, 3841 )( 839, 3649 )( 839, 3649 )
\qbezier( 752, 4202 )( 813, 3841 )( 813, 3841 )
}
\textcolor{yellow}{
\qbezier( 692, 4421 )( 752, 4202 )( 752, 4202 )
\qbezier( 692, 500 )( 692, 4500 )( 692, 4500 )
\qbezier( 670, 537 )( 692, 537 )( 692, 537 )
\qbezier( 670, 637 )( 692, 637 )( 692, 637 )
\qbezier( 670, 736 )( 692, 736 )( 692, 736 )
\qbezier( 670, 836 )( 692, 836 )( 692, 836 )
\qbezier( 648, 935 )( 692, 935 )( 692, 935 )
\qbezier( 670, 1035 )( 692, 1035 )( 692, 1035 )
\qbezier( 670, 1135 )( 692, 1135 )( 692, 1135 )
\qbezier( 670, 1234 )( 692, 1234 )( 692, 1234 )
\qbezier( 670, 1334 )( 692, 1334 )( 692, 1334 )
\qbezier( 648, 1433 )( 692, 1433 )( 692, 1433 )
\qbezier( 670, 1533 )( 692, 1533 )( 692, 1533 )
\qbezier( 670, 1632 )( 692, 1632 )( 692, 1632 )
\qbezier( 670, 1732 )( 692, 1732 )( 692, 1732 )
\qbezier( 670, 1832 )( 692, 1832 )( 692, 1832 )
\qbezier( 648, 1931 )( 692, 1931 )( 692, 1931 )
\qbezier( 670, 2031 )( 692, 2031 )( 692, 2031 )
\qbezier( 670, 2130 )( 692, 2130 )( 692, 2130 )
\qbezier( 670, 2230 )( 692, 2230 )( 692, 2230 )
\qbezier( 670, 2330 )( 692, 2330 )( 692, 2330 )
\qbezier( 648, 2429 )( 692, 2429 )( 692, 2429 )
\qbezier( 670, 2529 )( 692, 2529 )( 692, 2529 )
\qbezier( 670, 2628 )( 692, 2628 )( 692, 2628 )
\qbezier( 670, 2728 )( 692, 2728 )( 692, 2728 )
\qbezier( 670, 2828 )( 692, 2828 )( 692, 2828 )
\qbezier( 648, 2927 )( 692, 2927 )( 692, 2927 )
\qbezier( 670, 3027 )( 692, 3027 )( 692, 3027 )
\qbezier( 670, 3126 )( 692, 3126 )( 692, 3126 )
\qbezier( 670, 3226 )( 692, 3226 )( 692, 3226 )
\qbezier( 670, 3326 )( 692, 3326 )( 692, 3326 )
\qbezier( 648, 3425 )( 692, 3425 )( 692, 3425 )
\qbezier( 670, 3525 )( 692, 3525 )( 692, 3525 )
\qbezier( 670, 3624 )( 692, 3624 )( 692, 3624 )
\qbezier( 670, 3724 )( 692, 3724 )( 692, 3724 )
\qbezier( 670, 3824 )( 692, 3824 )( 692, 3824 )
\qbezier( 648, 3923 )( 692, 3923 )( 692, 3923 )
\qbezier( 670, 4023 )( 692, 4023 )( 692, 4023 )
\qbezier( 670, 4122 )( 692, 4122 )( 692, 4122 )
\qbezier( 670, 4222 )( 692, 4222 )( 692, 4222 )
\qbezier( 670, 4321 )( 692, 4321 )( 692, 4321 )
\qbezier( 648, 4421 )( 692, 4421 )( 692, 4421 )
}
\textcolor{green}{
\qbezier( 692, 1931 )( 6230, 1931 )( 6230, 1931 )
\qbezier( 913, 1915 )( 913, 1931 )( 913, 1931 )
\qbezier( 1135, 1915 )( 1135, 1931 )( 1135, 1931 )
\qbezier( 1356, 1915 )( 1356, 1931 )( 1356, 1931 )
\qbezier( 1578, 1915 )( 1578, 1931 )( 1578, 1931 )
\qbezier( 1799, 1898 )( 1799, 1931 )( 1799, 1931 )
\qbezier( 2021, 1915 )( 2021, 1931 )( 2021, 1931 )
\qbezier( 2243, 1915 )( 2243, 1931 )( 2243, 1931 )
\qbezier( 2464, 1915 )( 2464, 1931 )( 2464, 1931 )
\qbezier( 2686, 1915 )( 2686, 1931 )( 2686, 1931 )
\qbezier( 2907, 1898 )( 2907, 1931 )( 2907, 1931 )
\qbezier( 3129, 1915 )( 3129, 1931 )( 3129, 1931 )
\qbezier( 3350, 1915 )( 3350, 1931 )( 3350, 1931 )
\qbezier( 3572, 1915 )( 3572, 1931 )( 3572, 1931 )
\qbezier( 3793, 1915 )( 3793, 1931 )( 3793, 1931 )
\qbezier( 4015, 1898 )( 4015, 1931 )( 4015, 1931 )
\qbezier( 4236, 1915 )( 4236, 1931 )( 4236, 1931 )
\qbezier( 4458, 1915 )( 4458, 1931 )( 4458, 1931 )
\qbezier( 4679, 1915 )( 4679, 1931 )( 4679, 1931 )
\qbezier( 4901, 1915 )( 4901, 1931 )( 4901, 1931 )
\qbezier( 5123, 1898 )( 5123, 1931 )( 5123, 1931 )
\qbezier( 5344, 1915 )( 5344, 1931 )( 5344, 1931 )
\qbezier( 5566, 1915 )( 5566, 1931 )( 5566, 1931 )
\qbezier( 5787, 1915 )( 5787, 1931 )( 5787, 1931 )
\qbezier( 6009, 1915 )( 6009, 1931 )( 6009, 1931 )
\qbezier( 6230, 1898 )( 6230, 1931 )( 6230, 1931 )
}

\put(3550,2500){\makebox(0,0)[cc]{e^{-x}\cos(5x)}}
\end{picture}
\[

[Leibniz]

\left(\begin{array}{cccc}a&b&c&d\\ 1&0&1&-1\\m&n&p&q\end{array}\right)

[Orion1]

\unitlength 0.02mm
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\textcolor{red}{
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\qbezier( 2279, 1524)( 2299, 1528)( 2319, 1531)
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\qbezier( 2359, 1535)( 2379, 1535)( 2399, 1534)
\qbezier( 2399, 1534)( 2419, 1533)( 2439, 1530)
\qbezier( 2439, 1530)( 2459, 1528)( 2479, 1524)
\qbezier( 2479, 1524)( 2499, 1520)( 2519, 1516)
\qbezier( 2519, 1516)( 2539, 1512)( 2559, 1508)
\qbezier( 2559, 1508)( 2579, 1504)( 2599, 1500)
\qbezier( 2599, 1500)( 2619, 1496)( 2639, 1492)
\qbezier( 2639, 1492)( 2659, 1489)( 2679, 1486)
\qbezier( 2679, 1486)( 2699, 1484)( 2719, 1483)
\qbezier( 2719, 1483)( 2739, 1481)( 2759, 1481)
\qbezier( 2759, 1481)( 2779, 1481)( 2799, 1481)
\qbezier( 2799, 1481)( 2819, 1482)( 2839, 1483)
\qbezier( 2839, 1483)( 2859, 1485)( 2879, 1486)
\qbezier( 2879, 1486)( 2899, 1488)( 2919, 1491)
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\qbezier( 2959, 1495)( 2979, 1497)( 2999, 1499)
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\qbezier( 3239, 1508)( 3259, 1507)( 3279, 1507)
\qbezier( 3279, 1507)( 3299, 1505)( 3319, 1504)
\qbezier( 3319, 1504)( 3339, 1503)( 3359, 1502)
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\qbezier( 3399, 1500)( 3419, 1498)( 3439, 1497)
\qbezier( 3439, 1497)( 3459, 1497)( 3479, 1496)
\qbezier( 3479, 1496)( 3499, 1495)( 3519, 1495)
\qbezier( 3519, 1495)( 3539, 1494)( 3559, 1494)
\qbezier( 3559, 1494)( 3579, 1494)( 3599, 1494)
\qbezier( 3599, 1494)( 3619, 1494)( 3639, 1495)
\qbezier( 3639, 1495)( 3659, 1495)( 3679, 1496)
\qbezier( 3679, 1496)( 3699, 1496)( 3719, 1497)
\qbezier( 3719, 1497)( 3739, 1498)( 3759, 1498)
\qbezier( 3759, 1498)( 3779, 1499)( 3799, 1499)
\qbezier( 3799, 1499)( 3819, 1500)( 3839, 1501)
\qbezier( 3839, 1501)( 3859, 1501)( 3879, 1501)
\qbezier( 3879, 1501)( 3899, 1502)( 3919, 1502)
\qbezier( 3919, 1502)( 3939, 1502)( 3959, 1502)
\qbezier( 3959, 1502)( 3979, 1502)( 3999, 1502)
}
\linethickness{1pt}
\qbezier(0, 1500)( 2000, 1500)( 4000, 1500)
\linethickness{1pt}
\qbezier(0,0)(0, 1500)(0, 3000)
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\end{picture}

[robphy]

\] \unitlength 0.02mm \begin{picture}(400,3000)(0,0) \textcolor{red}{ \def\qb#1#2#3#4{\qbezier(#1,#2)(#3,#4)(#3,#4)} \qb{3464}{1145}{3574}{1179} \qb{3353}{1179}{3242}{1221} \qb{3574}{1179}{3685}{1222} \qb{3353}{1179}{3463}{1223} \qb{3574}{1179}{3463}{1223} \qb{3242}{1221}{3131}{1295} \qb{3685}{1222}{3796}{1295} \qb{3242}{1221}{3352}{1300} \qb{3463}{1223}{3352}{1300} \qb{3463}{1223}{3574}{1300} \qb{3685}{1222}{3574}{1300} \qb{3352}{1300}{3463}{1328} \qb{3131}{1295}{3241}{1333} \qb{3352}{1300}{3241}{1333} \qb{3796}{1295}{3685}{1334} \qb{3574}{1300}{3685}{1334} \qb{3131}{1295}{3020}{1345} \qb{3796}{1295}{3907}{1345} \qb{3020}{1345}{2909}{1354} \qb{3907}{1345}{4018}{1355} \qb{2909}{1354}{2798}{1374} \qb{4018}{1355}{4128}{1375} \qb{3117}{1340}{3019}{1388} \qb{2909}{1354}{3019}{1388} \qb{3809}{1340}{3907}{1389} \qb{4018}{1355}{3907}{1389} \qb{3138}{1339}{3241}{1414} \qb{3349}{1331}{3241}{1414} \qb{3788}{1339}{3685}{1414} \qb{3578}{1331}{3685}{1414} \qb{3571}{1331}{3463}{1424} \qb{3355}{1331}{3463}{1424} \qb{2798}{1374}{2687}{1438} \qb{4128}{1375}{4239}{1439} \qb{3019}{1388}{2908}{1499} \qb{2798}{1374}{2908}{1499} \qb{4128}{1375}{4017}{1500} \qb{3907}{1389}{4017}{1500} \qb{2687}{1438}{2576}{1529} \qb{4239}{1439}{4350}{1530} \qb{3019}{1388}{3130}{1539} \qb{3241}{1414}{3130}{1539} \qb{3685}{1414}{3796}{1539} \qb{3907}{1389}{3796}{1539} \qb{3241}{1414}{3352}{1550} \qb{3463}{1424}{3352}{1550} \qb{3685}{1414}{3574}{1550} \qb{3463}{1424}{3574}{1550} \qb{3130}{1539}{3019}{1584} \qb{2908}{1499}{3019}{1584} \qb{4017}{1500}{3906}{1584} \qb{3796}{1539}{3906}{1584} \qb{2908}{1499}{2797}{1594} \qb{2687}{1438}{2797}{1594} \qb{4017}{1500}{4128}{1595} \qb{4239}{1439}{4128}{1595} \qb{2576}{1529}{2465}{1615} \qb{4350}{1530}{4461}{1616} \qb{2797}{1594}{2686}{1635} \qb{2576}{1529}{2686}{1635} \qb{4350}{1530}{4239}{1635} \qb{4128}{1595}{4239}{1635} \qb{2465}{1615}{2575}{1638} \qb{2686}{1635}{2575}{1638} \qb{4461}{1616}{4350}{1639} \qb{4239}{1635}{4350}{1639} \qb{2418}{1643}{2353}{1652} \qb{4507}{1644}{4571}{1653} \qb{3199}{1552}{3130}{1682} \qb{3078}{1573}{3130}{1682} \qb{3847}{1573}{3795}{1683} \qb{3726}{1552}{3795}{1683} \qb{2465}{1615}{2354}{1683} \qb{4461}{1616}{4572}{1684} \qb{2353}{1652}{2242}{1688} \qb{4571}{1653}{4682}{1689} \qb{2746}{1613}{2797}{1710} \qb{2881}{1590}{2797}{1710} \qb{4044}{1591}{4128}{1711} \qb{4179}{1613}{4128}{1711} \qb{2189}{1716}{2131}{1732} \qb{4735}{1717}{4793}{1734} \qb{2353}{1652}{2243}{1737} \qb{2354}{1683}{2243}{1737} \qb{4572}{1684}{4682}{1738} \qb{4571}{1653}{4682}{1738} \qb{2242}{1688}{2131}{1746} \qb{4682}{1689}{4793}{1747} \qb{3439}{1550}{3352}{1762} \qb{3268}{1546}{3352}{1762} \qb{3657}{1546}{3573}{1762} \qb{3486}{1550}{3573}{1762} \qb{2131}{1732}{2081}{1774} \qb{4793}{1734}{4842}{1775} \qb{2131}{1732}{2020}{1780} \qb{4793}{1734}{4904}{1782} \qb{2242}{1688}{2131}{1785} \qb{2243}{1737}{2131}{1785} \qb{4682}{1689}{4793}{1786} \qb{4682}{1738}{4793}{1786} \qb{2131}{1785}{2020}{1831} \qb{2131}{1746}{2020}{1831} \qb{2020}{1780}{1980}{1831} \qb{4904}{1782}{4943}{1832} \qb{4793}{1747}{4904}{1832} \qb{4793}{1786}{4904}{1832} \qb{2020}{1780}{1933}{1853} \qb{4904}{1782}{4990}{1854} \qb{2797}{1710}{2686}{1856} \qb{2608}{1637}{2686}{1856} \qb{4128}{1711}{4239}{1856} \qb{4317}{1638}{4239}{1856} \qb{2020}{1831}{1909}{1870} \qb{4904}{1832}{5015}{1872} \qb{1909}{1870}{1798}{1896} \qb{5015}{1872}{5126}{1898} \qb{2920}{1589}{3019}{1904} \qb{3130}{1682}{3019}{1904} \qb{1798}{1896}{1687}{1904} \qb{4005}{1589}{3906}{1904} \qb{3795}{1683}{3906}{1904} \qb{5126}{1898}{5236}{1906} \qb{1687}{1904}{1576}{1908} \qb{5236}{1906}{5347}{1909} \qb{2008}{1835}{1909}{1919} \qb{1798}{1896}{1909}{1919} \qb{4916}{1836}{5015}{1921} \qb{5126}{1898}{5015}{1921} \qb{1576}{1908}{1465}{1937} \qb{5347}{1909}{5458}{1939} \qb{2480}{1657}{2575}{1961} \qb{2686}{1856}{2575}{1961} \qb{4445}{1658}{4349}{1962} \qb{4239}{1856}{4349}{1962} \qb{3130}{1682}{3241}{1984} \qb{3352}{1762}{3241}{1984} \qb{3795}{1683}{3684}{1984} \qb{3573}{1762}{3684}{1984} \qb{2042}{1822}{2131}{1992} \qb{4882}{1823}{4792}{1993} \qb{3573}{1762}{3462}{1996} \qb{3352}{1762}{3462}{1996} \qb{1687}{1904}{1798}{2010} \qb{1909}{1919}{1798}{2010} \qb{1465}{1937}{1354}{2011} \qb{5236}{1906}{5125}{2011} \qb{5015}{1921}{5125}{2011} \qb{1803}{2006}{1798}{2012} \qb{5458}{1939}{5569}{2013} \qb{5119}{2007}{5125}{2014} \qb{3019}{1904}{3130}{2015} \qb{3241}{1984}{3130}{2015} \qb{3684}{1984}{3795}{2016} \qb{3906}{1904}{3795}{2016} \qb{2575}{1961}{2464}{2027} \qb{2360}{1684}{2464}{2027} \qb{4564}{1685}{4460}{2028} \qb{4349}{1962}{4460}{2028} \qb{1798}{2023}{1909}{2037} \qb{3019}{1904}{2908}{2038} \qb{2797}{1710}{2908}{2038} \qb{5125}{2024}{5014}{2038} \qb{4128}{1711}{4017}{2038} \qb{3906}{1904}{4017}{2038} \qb{2147}{1778}{2242}{2043} \qb{2131}{1992}{2242}{2043} \qb{4792}{1993}{4682}{2044} \qb{4776}{1779}{4682}{2044} \qb{1354}{2011}{1465}{2045} \qb{5569}{2013}{5458}{2047} \qb{2464}{2027}{2353}{2055} 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[EddieCrash]

Hello, could you tell me how you generated the data used to then 'tex' them into such images ?

[Orion1]

If you want to include graphics functions in your tex generated documents, I recommend using 'gnuplot'. It is much easier to use.

Reference:
http://archives.math.utk.edu/software/multi-platform/gnuplot/msdos/

[robphy]

\]

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\[

[MathematicalPhysicist]

\circlearrowleft

i am trying to see if it works.

[Doc Al]

Test....
\vec{F} = m \vec{a}

[Drimar]

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\qb{4494}{2226}{4570}{2572} \qb{4459}{2454}{4570}{2572} \qb{4126}{2484}{4028}{2623} \qb{2795}{2483}{2895}{2627} \qb{1797}{2482}{1686}{2627} \qb{1575}{2532}{1686}{2627} \qb{1575}{2565}{1686}{2627} \qb{5124}{2483}{5235}{2629} \qb{5346}{2567}{5235}{2629} \qb{5346}{2533}{5235}{2629} \qb{3129}{2103}{3240}{2637} \qb{3351}{2382}{3240}{2637} \qb{3572}{2382}{3683}{2637} \qb{3794}{2103}{3683}{2637} \qb{2241}{2508}{2130}{2640} \qb{2019}{2433}{2130}{2640} \qb{2019}{2419}{2130}{2640} \qb{4902}{2434}{4792}{2642} \qb{4681}{2509}{4792}{2642} \qb{4903}{2420}{4792}{2642} \qb{2019}{2433}{2130}{2655} \qb{2097}{2579}{2130}{2655} \qb{1575}{2565}{1686}{2656} \qb{4902}{2434}{4791}{2656} \qb{4822}{2585}{4791}{2656} \qb{5346}{2567}{5235}{2657} \qb{2796}{2271}{2906}{2663} \qb{4126}{2271}{4015}{2664} \qb{1686}{2627}{1797}{2667} \qb{1906}{2440}{1797}{2667} \qb{1686}{2656}{1797}{2667} \qb{5235}{2629}{5124}{2669} \qb{5015}{2441}{5124}{2669} \qb{5235}{2657}{5124}{2669} \qb{2078}{2570}{2018}{2670} \qb{1797}{2667}{1907}{2671} \qb{1997}{2484}{1907}{2671} \qb{2018}{2670}{1907}{2671} \qb{4843}{2572}{4902}{2671} \qb{4924}{2485}{5013}{2672} \qb{5124}{2669}{5013}{2672} \qb{2130}{2655}{2241}{2672} \qb{2130}{2640}{2241}{2672} \qb{2352}{2571}{2241}{2672} \qb{2352}{2277}{2241}{2672} \qb{4570}{2277}{4681}{2673} \qb{4791}{2656}{4681}{2673} \qb{4792}{2642}{4681}{2673} \qb{4570}{2572}{4681}{2673} \qb{2018}{2670}{2129}{2685} \qb{2142}{2669}{2129}{2685} \qb{4902}{2671}{4791}{2686} \qb{4779}{2671}{4791}{2686} \qb{2129}{2685}{2164}{2697} \qb{4791}{2686}{4757}{2697} \qb{2907}{2197}{3018}{2730} \qb{2907}{2570}{3018}{2730} \qb{4016}{2570}{3905}{2731} \qb{4016}{2197}{3905}{2731} \qb{1907}{2671}{1796}{2741} \qb{1686}{2656}{1796}{2741} \qb{5013}{2672}{5124}{2743} \qb{5235}{2657}{5124}{2743} \qb{3018}{2218}{3129}{2749} \qb{3018}{2730}{3129}{2749} \qb{3240}{2637}{3129}{2749} \qb{3905}{2218}{3794}{2750} \qb{3683}{2637}{3794}{2750} \qb{3905}{2731}{3794}{2750} \qb{3351}{2382}{3461}{2766} \qb{3572}{2382}{3461}{2766} \qb{2352}{2571}{2241}{2789} \qb{2130}{2655}{2241}{2789} \qb{4570}{2572}{4680}{2790} \qb{4791}{2656}{4680}{2790} \qb{2018}{2670}{1907}{2810} \qb{1796}{2741}{1907}{2810} \qb{5124}{2743}{5013}{2811} \qb{4902}{2671}{5013}{2811} \qb{2241}{2789}{2351}{2840} \qb{2462}{2453}{2351}{2840} \qb{4459}{2454}{4569}{2841} \qb{4680}{2790}{4569}{2841} \qb{2351}{2840}{2462}{2860} \qb{2573}{2389}{2462}{2860} \qb{4348}{2390}{4458}{2861} \qb{4569}{2841}{4458}{2861} \qb{1907}{2810}{2018}{2864} \qb{2129}{2685}{2018}{2864} \qb{4791}{2686}{4902}{2865} \qb{5013}{2811}{4902}{2865} \qb{2433}{2855}{2462}{2872} \qb{4487}{2856}{4458}{2873} \qb{2684}{2398}{2573}{2893} \qb{2462}{2872}{2573}{2893} \qb{2462}{2860}{2573}{2893} \qb{4237}{2399}{4347}{2894} \qb{4458}{2873}{4347}{2894} \qb{4458}{2861}{4347}{2894} \qb{2217}{2760}{2129}{2912} \qb{2018}{2864}{2129}{2912} \qb{4902}{2865}{4791}{2913} \qb{4703}{2763}{4791}{2913} \qb{2490}{2883}{2572}{2953} \qb{2588}{2919}{2572}{2953} \qb{4428}{2884}{4347}{2953} \qb{4331}{2920}{4347}{2953} \qb{2906}{2663}{3017}{2954} \qb{2907}{2570}{3017}{2954} \qb{4015}{2664}{3905}{2954} \qb{4016}{2570}{3905}{2954} \qb{2795}{2483}{2684}{2954} \qb{2573}{2893}{2684}{2954} \qb{4126}{2484}{4236}{2955} \qb{4347}{2894}{4236}{2955} \qb{2321}{2826}{2240}{2958} \qb{2129}{2912}{2240}{2958} \qb{4791}{2913}{4679}{2959} \qb{4598}{2828}{4679}{2959} \qb{3240}{2637}{3350}{2981} \qb{3461}{2766}{3350}{2981} \qb{3683}{2637}{3572}{2981} \qb{3461}{2766}{3572}{2981} \qb{2240}{2958}{2350}{2998} \qb{2454}{2867}{2350}{2998} \qb{4465}{2869}{4568}{2999} \qb{4679}{2959}{4568}{2999} \qb{2572}{2953}{2461}{3023} \qb{2350}{2998}{2461}{3023} \qb{4568}{2999}{4457}{3024} \qb{4347}{2953}{4457}{3024} \qb{2684}{2954}{2794}{3028} \qb{2903}{2651}{2794}{3028} \qb{4018}{2655}{4125}{3028} \qb{4236}{2955}{4125}{3028} \qb{2713}{2981}{2683}{3044} \qb{2572}{2953}{2683}{3044} \qb{4347}{2953}{4236}{3044} \qb{4206}{2982}{4236}{3044} \qb{2794}{3028}{2905}{3071} 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\qb{3110}{3133}{3015}{3223} \qb{4013}{3139}{3902}{3224} \qb{3810}{3136}{3902}{3224} \qb{3239}{3074}{3350}{3226} \qb{3461}{3151}{3350}{3226} \qb{3683}{3075}{3572}{3227} \qb{3461}{3151}{3572}{3227} \qb{3128}{3169}{3239}{3245} \qb{3128}{3075}{3239}{3245} \qb{3350}{3226}{3239}{3245} \qb{3572}{3227}{3683}{3245} \qb{3794}{3075}{3683}{3245} \qb{3794}{3169}{3683}{3245} \qb{3128}{3169}{3239}{3262} \qb{3794}{3169}{3683}{3263} \qb{3015}{3223}{3126}{3267} \qb{3201}{3230}{3126}{3267} \qb{3719}{3231}{3791}{3267} \qb{3902}{3224}{3791}{3267} \qb{3277}{3282}{3237}{3288} \qb{3126}{3267}{3237}{3288} \qb{3644}{3283}{3680}{3288} \qb{3791}{3267}{3680}{3288} \qb{3572}{3227}{3461}{3295} \qb{3350}{3226}{3461}{3295} \qb{3239}{3245}{3350}{3320} \qb{3239}{3262}{3350}{3320} \qb{3683}{3245}{3572}{3320} \qb{3683}{3263}{3572}{3320} \qb{3461}{3295}{3572}{3320} \qb{3350}{3320}{3461}{3339} \qb{3572}{3320}{3461}{3339} \qb{3379}{3325}{3348}{3339} \qb{3237}{3288}{3348}{3339} \qb{3680}{3288}{3569}{3339} \qb{3539}{3326}{3569}{3339} \qb{3348}{3339}{3458}{3399} } \end{picture} \[

[MathematicalPhysicist]

iv'e recently downaloaded Miktex and TeXnicCenter.

and im trying to learn how to write.
thus far i didn't get very far (-:.

i hope someone can correct me here, here's my code:
[code]
\begin{normalsize}
\begin{document}
\begin{eqnarray}
>>\Pi+\A
\end{eqnarray}
\end{document}
\end{normalsize}
[\code]

[Hootenanny]

Im using miktex also. You don't need the [ code ] tages and you don't need the { } around the normalsize. In addition the final normalsize tag should go before your end document tag.

~H

[MathematicalPhysicist]

so you mean it should be this way:
\begin{document}
\begin{eqnarray}
>>\Pi+\A
\normalsize
\end{eqnarray}
\end{document}


btw, the [code] and [\code] were just for fun, i didn't actually typed them in the editor. (-:

[Hootenanny]

Yes, but you don't need the normalsize operator unless you specified a difference size. The normalsize should come before whatever you want to be 'normal sized'.

~H

[MathematicalPhysicist]

Yes, but you don't need the normalsize operator unless you specified a difference size. The normalsize should come before whatever you want to be 'normal sized'.

~H
if the bottom box of the compiler states that the \normalsize is undefined it means i should download a package which contain it or something went wrong in the configuration of the tex editor and miktex?

btw, which packages did you downaload, iv'e downloaded the linear logic and astrnomical symbols.

[Hootenanny]

I'm not sure I didn't have to download any additional packages 4 normal size to work.

I've downloaded IOP Article style settings, amssymb (math) package and the fancy headings package.

~H

[MathematicalPhysicist]

I'm not sure I didn't have to download any additional packages 4 normal size to work.

I've downloaded IOP Article style settings, amssymb (math) package and the fancy headings package.

~H
what an editor do you use with miktex?

[Hootenanny]

what an editor do you use with miktex?

Texnic Center

[matt grime]

Any text editor is fine (emacs, vim, nano, pico....)

What is your full preamble? preamble=all the things that appear before the command \begin{document}

Here for example is a latex document of mine (for reasons that can only be described as idiotic the upload services chooses to think that the final three letters of a file name determine what it is, and that .tex is not allowed, so if you download it change it back to a a .tex file) with lots of usepackages and extra 'prettification' settings. If you try to compile it it might complain about what isn't installed in miktex (all packages are currently in a default installation of TeTeX and whatever my Mac version is called).

If you find the packages' homepages you'll see what things like titlesec and titletoc do, as well as xypic or other things, play around with it to your heart's content.

[MathematicalPhysicist]

it now displays what iv'e typed.
apparently i needed to make a space between the second line and the third.

[Doc Al]

Test...
\vec{F} = m \vec{a}

This is making me nuts. For some reason, Latex is not displaying for me. Worked from this same computer just fine yesterday. Very frustrating.

[MathematicalPhysicist]

iv'e doewnloaded the package pst-3dplot, and tried to work it out with an example from the documentation.
can you see what my mistake is, or what should i add to make it work:

\begin{pspicture}(1,2)(-1,-2)\psgrid
\pstThreeDCoor
\end{pspicture}

[robphy]

Is the pstricks package supported on this forum's LaTeX?

[Twukwuw]

test
a^2

/alpha

[loopgrav]

In my experience, by far the easiest editor to use (on a pc) is WinEdt. By default, it is configured to work with MiKTeX, and it couldn't be easier. See www.winedt.com.

[honestrosewater]

Is there a limit on how long arrays or something can be? I seem to have had that problem today.

[robphy]

\begin{align*}
<N!>& <N! > < N!> < N! > < N ! > <N> <N > < N> < N > <!> - \\
<P!>& <P! > < P!> < P! > < P ! > <P> <P > < P> < P > <!> - \\
<Q!>& <Q! > < Q!> < Q! > < Q ! > <Q> <Q > < Q> < Q > <!> - \\
<I!>& <I! > < I!> < I! > < I ! > <I> <I > < I> < I > <!> - \\
<U!>& <U! > < U!> < U! > < U ! > <U> <U > < U> < U > <!> - \\
<B!>& <B! > < B!> < B! > < B ! > <B> <B > < B> < B > <!>
\end{align*}


<\psi>

<\psi | H |\psi>



\begin{align*}
<N!>& <N! > < N!> < N! > < N ! > <N> <N > < N> < N > <!> - \\
<P!>& <P! > < P!> < P! > < P ! > <P> <P > < P> < P > <!> - \\
<Q!>& <Q! > < Q!> < Q! > < Q ! > <Q> <Q > < Q> < Q > <!> - \\
<I!>& <I! > < I!> < I! > < I ! > <I> <I > < I> < I > <!> - \\
<U!>& <U! > < U!> < U! > < U ! > <U> <U > < U> < U > <!> - \\
<B!>& <B! > < B!> < B! > < B ! > <B> <B > < B> < B > <!>
\end{align*}

[cepheid]

\hat{I}(k) = \int_{-\infty}^{\infty}{I(x)e^{-ikx} \ dx}

Quick test

[AKG]

It looks like \LaTeX backgrounds are clear again.

\mathbb{T}\mathbf{E}\mathcal{S}\mathfrak{T}^{ing}

[robphy]

It looks like \LaTeX backgrounds are clear again.

\mathbb{T}\mathbf{E}\mathcal{S}\mathfrak{T}^{ing}

for me...
in firefox, yes
in ie6, no

[twoflower]

\frac{\partial^3 f}{\partial x \partial y^2}

[robphy]

\]

\unitlength 1mm
\begin{picture}(87.5,85)(0,0)
\qbezier(46.88,14.38)(71.88,59.38)(71.88,59.38)
\qbezier(60,15)(85,60)(85,60)
\qbezier(37.5,20)(87.5,45)(87.5,45)
\qbezier(60,60)(85,15)(85,15)
\qbezier(60,6)(60,85)(60,85)
\qbezier(72.5,37.5)(60.12,37.5)(60.12,37.5)

\put(61.25,22.5){\makebox(0,0)[cc]{$\theta$}}
\put(65.62,40.62){\makebox(0,0)[cc]{5}}
\put(64.38,31.88){\makebox(0,0)[cc]{L}}
\put(64.38,31.88){\makebox(0,0)[cc]{}}
\put(57.5,13.75){\makebox(0,0)[cc]{A}}
\put(76.25,38.12){\makebox(0,0)[cc]{B}}
\put(55.62,38.75){\makebox(0,0)[cc]{D}}

\end{picture}
\]

[Kalouste]

Testing:

\frac{180}{\pi}


\mbox{thank you robphy}


http://www.equationsheet.com/entertex.php?SID=XXXXXBOT

Does this site work for you? I was hoping to generate some png files, but I can't. I've consulted the howtolatex pdf file. Thanks in advance.

[robphy]

Use the other slash for closing the tex tag

x^2


[ tex]
x^2
[ /tex] with spaces added to show the tag

The above site gave an error message that some feature was turned off for security reasons (it said "shell_exec() has been disabled for security reasons...").

Instead try:
http://hausheer.osola.com/latex2png
and
http://www.sciencesoft.at/index.jsp?link=latex&ochem=false#pic (here you have include the whole \documentclass... \begin{document}... \end{document} thing)

[dav2008]

a \\ b

\ a \\ b \

\] a \\ b \[

[Orion1]

robphy, would it be possible to install this 'latex2png' editor on physicsforums?

I noticed that the sourcecode was available:
http://hausheer.osola.com/software/latex2png.phps
http://hausheer.osola.com/latex2png

And I also noticed that 'ImageMagick' software was freeware:
http://www.imagemagick.org/script/index.php

I noticed that the 'preview changes' button regarding latex source code is still non-functional.

An editor similar to this on physicsforums would seem advantageous for testing latex sourcecode for posting on forums such as General Math, Calculus & Analysis, Differential Equations.

[robphy]

Orion1,

I don't maintain this site... I am merely an active user in this \LaTeX forum.

Your question should be directed to the
PF Lounge / Forum Feedback & Announcements section:
http://physicsforums.com/forumdisplay.php?f=19

I believe the entire ability to use \LaTeX in a forum is a clever non-trivial hack of the forum software. Unfortunately, when changes are made somewhere [software upgrades], it's possible that something else (like the \LaTeX preview) can be broken.

[Hollysmoke]

x^3-2x^2-5x+6

[Hootenanny]

Is is possible to change the colour of latex formulae?

~H

[robphy]

x=\frac{-b \pm \sqrt{ {\color{red}b^2-4ac} }}{2a}

[Hootenanny]

Thanks rob!

~H

[Gablar16]

\Theta=15 \cdot \frac {\pi}{180}=\frac {3\pi}{16}

[Hootenanny]

Testing;

{\color{red}\boxed{{\color{blue}\frac{dy}{dx} = \frac{\frac{dy}{dt}}{\frac{dx}{dt}}}}}

[Hootenanny]

\setlength{\unitlength}{1mm}
\begin{picture}(60, 40)
{\color{red}\put(30, 20){\vector(1, 0){30}}}
{\color{orange}\put(30, 20){\vector(4, 1){20}}}
{\color{yellow}\put(30, 20){\vector(3, 1){25}}}
{\color{green}\put(30, 20){\vector(2, 1){30}}}
{\color{blue}\put(30, 20){\vector(1, 2){10}}}
\thicklines
\put(30, 20){\vector(-4, 1){30}}
\put(30, 20){\vector(-1, 4){5}}
\thinlines
\put(30, 20){\vector(-1, -1){5}}
\put(30, 20){\vector(-1, -4){5}}
\end{picture}

[Hootenanny]

Does anyone know of any good tutorials for drawing vectors in latex?

[robphy]

As you probably have realized by now, LaTeX's \vector and \line in the picture environment have a limited number of available slopes.

http://www.eng.cam.ac.uk/help/tpl/textprocessing/teTeX/latex/latex2e-html/ltx-43.html
http://www.ursoswald.ch/LaTeXGraphics/picture/picture.html [nice examples]

jpicedt for LaTeX (http://jpicedt.sourceforge.net/), a drawing application in java, makes clever use of \multiput to emulate lines and vectors of any slope. Unfortunately, the resulting \multiput commands are [for me] not intuitively easy to modify. However, you can use jpicedt in eepic mode, which expresses a line in terms of endpoints, rather than "[some measure of] magnitude" and direction. Then, you have to edit those lines to use the \qbezier statement (since eepic is not available on PF).

simple examples:
http://physicsforums.com/showpost.php?p=996129&postcount=720
http://physicsforums.com/showpost.php?p=969925&postcount=695

fancy examples:
http://physicsforums.com/showpost.php?p=968227&postcount=689 [my first example with \qbezier]
http://physicsforums.com/showpost.php?p=968788&postcount=692

By the way, i would be nice if something like jpicedt (possibly modified for use at PF) were available here. A picture is worth a thousand words. [It need not be LaTeX-related... it could be another web-standard like SVG.]

[Hootenanny]

Thanks Rob, I'll have a bash at that tonight. Btw, is there anyway to label the vector?

[pervect]

\dot{h} \hspace{.5 in} \dot{\theta}



\large
\dot{h} \hspace{.5 in} \dot{\theta}



\mathbf
\dot{h} \hspace{.5 in} \dot{\theta}



\mathtt
\dot{h} \hspace{.5 in} \dot{\theta}



\huge
\dot{h} \hspace{.5 in} \dot{\theta}



\.{h} \hspace{.5 in} \.{\theta}


Is there anyway to make over-dots with the dot being more visible than a flyspeck?

[robphy]

\stackrel{\centerdot}{\theta}\dot\theta

\def\DOT#1{\stackrel{\centerdot}{#1}}
\DOT{\theta}

\def\DOT#1{\stackrel{\mathbf\centerdot}{#1}}
\DOT{\theta}


\def\DOT#1{\stackrel{\tiny\bullet}{#1}}
\DOT{\theta}

[pervect]

\]
\begin{picture}(375,225)(0,0)

\put(100.0,82.0){\rule[-0.200pt]{4.818pt}{0.400pt}}
\put(80,82){\makebox(0,0)[r]{ 0}}
\put(294.0,82.0){\rule[-0.200pt]{4.818pt}{0.400pt}}
\put(100.0,103.0){\rule[-0.200pt]{4.818pt}{0.400pt}}
\put(80,103){\makebox(0,0)[r]{ 1}}
\put(294.0,103.0){\rule[-0.200pt]{4.818pt}{0.400pt}}
\put(100.0,123.0){\rule[-0.200pt]{4.818pt}{0.400pt}}
\put(80,123){\makebox(0,0)[r]{ 2}}
\put(294.0,123.0){\rule[-0.200pt]{4.818pt}{0.400pt}}
\put(100.0,144.0){\rule[-0.200pt]{4.818pt}{0.400pt}}
\put(80,144){\makebox(0,0)[r]{ 3}}
\put(294.0,144.0){\rule[-0.200pt]{4.818pt}{0.400pt}}
\put(100.0,164.0){\rule[-0.200pt]{4.818pt}{0.400pt}}
\put(80,164){\makebox(0,0)[r]{ 4}}
\put(294.0,164.0){\rule[-0.200pt]{4.818pt}{0.400pt}}
\put(100.0,185.0){\rule[-0.200pt]{4.818pt}{0.400pt}}
\put(80,185){\makebox(0,0)[r]{ 5}}
\put(294.0,185.0){\rule[-0.200pt]{4.818pt}{0.400pt}}
\put(100.0,82.0){\rule[-0.200pt]{0.400pt}{4.818pt}}
\put(100,41){\makebox(0,0){ 0}}
\put(100.0,165.0){\rule[-0.200pt]{0.400pt}{4.818pt}}
\put(143.0,82.0){\rule[-0.200pt]{0.400pt}{4.818pt}}
\put(143,41){\makebox(0,0){ 1}}
\put(143.0,165.0){\rule[-0.200pt]{0.400pt}{4.818pt}}
\put(186.0,82.0){\rule[-0.200pt]{0.400pt}{4.818pt}}
\put(186,41){\makebox(0,0){ 2}}
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\put(228.0,82.0){\rule[-0.200pt]{0.400pt}{4.818pt}}
\put(228,41){\makebox(0,0){ 3}}
\put(228.0,165.0){\rule[-0.200pt]{0.400pt}{4.818pt}}
\put(271.0,82.0){\rule[-0.200pt]{0.400pt}{4.818pt}}
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[pervect]

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\[

[MemoryOfUs]

Could someone please help me draw a digraph of 5 nodes with weights and loops included ? I just couldn't find out any articles out there in ctan that could help me accomplish this.

[a_rajesh_mit]

friends, i have an equation which is to be typeset in latex. will any one of you be kind enough to let me know how to do it in latex.
the equation is x=A.y where x and y are 3x1 vectors each (i.e. a column vector with 3 rows), A is a 3x3 square matrix (i.e., 3 rows and 3 columns). Can anyone help me

[matt grime]

A quick google search on typesetting matrices in latex will show you how to do it for any matrices. Go on, give it a go.

[Hootenanny]

Let me try
[tex]\alpha^\gamma[\tex]

Change your last tag to (without the spaces);

[ /tex ]

[matt grime]

\stackrel{\to}{\to}

\leftleftarrows

[buddyholly9999]

I have no idea how to make the dagger appear for the footnote..I've been looking online and all I come across are sites that say nothing how to do this. Any help would be appreciated.

[Doc Al]

I have no idea how to make the dagger appear for the footnote
footnote^\dagger

^\daggerDo you mean like this?

[buddyholly9999]

I guess that's one way to do it...but I would rather not cheat and just let Latex automatically format my text...instead what I did was download the footmisc package and then use the 'symbol*' argument and when i typed \footnote...i had to do \footnote[2] since 1 = * and 2 = \dagger...

[mathzeroh]

test:

(-\frac{1}{2}\ln{\sin{x}}+C)

x^2\sqrt{x}


NOTE:

the crash course has a major typo (if i'm not mistaken)

look at the 2 things i've encircled

[buddyholly9999]

Does anyone know the fancy cursive way to denote a powerset.

I'm not talking about \mathcal{P} = \{A_j : j \in J \}

[Triss]

Does anyone know the fancy cursive way to denote a powerset.

I'm not talking about \mathcal{P} = \{A_j : j \in J \}

There is \mathfrak{P}. if that is not it i think you will need another font package like fourier, and i do not think the forum supports those (does it?)

See page 6 in http://www.tex.ac.uk/tex-archive/fonts/fourier-GUT/doc/latex/fourier/fourier-doc-en.pdf to see how the fouier--calligraphic P looks like

[MathematicalPhysicist]

i have a question regarding tex, before tex was invented, how did scientists published equations through the internet?

[rpenner]

I am under the impression that typesetting software, like troff, predated both TeX and the internet. A quick survey of Google supports this clearly.

TeX was born in 1982, which was in the infancy of "The Internet" http://www.tug.org/ftp/historic/systems/unix/TeX2.9/tex82/TeXdoc/history.txt

For the early days of UNIX: The AT&T Man pages are typeset in nroff for terminals and troff for publishing. An additional utility, eqn, was a nroff preprocessor specific for equations. These have been around since the early 1970s.

http://ezine.daemonnews.org/199903/history.html

Prior to UNIX, in the 1960s, was CTSS which had RUNOFF which was an ancestor of VAX/VMS RUNOFF and UNIX troff, and GNU gtroff
http://mit.edu/Saltzer/www/publications/AH.9.01.html
http://www.multicians.org/thvv/7094.html

Prior to RUNOFF, there may have been a variety of custom (proprietrary) typesetting solutions used by published in the 1960's.

[buddyholly9999]

For the powerset fancy lettering I used calligra..found on this website
http://www.tug.dk/FontCatalogue/

as for ultima9999...it might be just me...but did you mean to use 5^{10}
??

[Zeit]

Excuse me, I just want to try it a bit.

t=\frac{t_0}{\sqrt{1-\frac{v^2}{c^2}}}

[Pakistani_Shikra]

can anyone tell me how to use binomial in laTeX bcoz when i use \binom it doesn't comes up with anything except = mn
can anyone explain this to me ??

[Triss]

can anyone tell me how to use binomial in laTeX bcoz when i use \binom it doesn't comes up with anything except = mn
can anyone explain this to me ??


\binom{}{} requires the amsmath package.

[VietDao29]

can anyone tell me how to use binomial in laTeX bcoz when i use \binom it doesn't comes up with anything except = mn
can anyone explain this to me ??
You mean this:
\left( \begin{array}{c} n \\ k \end{array} \right)?

[VietDao29]

Testing:

\setlength{\unitlength}{6cm}
\begin{picture}(1, 1)
\put(0, 0){\line(0, 1){1}}
\put(0, 0){\line(1, 0){1}}
\put(0, 0){\line(1, 1){1}}
\put(0, 0){\line(1, 2){.5}}
\put(0, 0){\line(1, 3){.33333}}
\put(0, 0){\line(1, 4){.25}}
\put(0, 0){\line(1, 5){.2}}
\put(0, 0){\line(1, 6){.16667}}
\put(0, 0){\line(2, 1){1}}
\put(0, 0){\line(2, 3){.6667}}
\put(0, 0){\line(2, 5){.4}}
\put(0, 0){\line(3, 1){1}}
\put(0, 0){\line(3, 2){1}}
\put(0, 0){\line(3, 4){.75}}
\put(0, 0){\line(3, 5){.6}}
\put(0, 0){\line(4, 1){1}}
\put(0, 0){\line(4, 3){1}}
\put(0, 0){\line(4, 5){.8}}
\put(0, 0){\line(5, 1){1}}
\put(0, 0){\line(5, 2){1}}
\put(0, 0){\line(5, 3){1}}
\put(0, 0){\line(5, 4){1}}
\put(0, 0){\line(5, 6){.8333}}
\put(0, 0){\line(6, 1){1}}
\put(0, 0){\line(6, 5){1}}
\end{picture}

\definecolor{hellgrau}{gray}{.8}
\definecolor{dunkelblau}{rgb}{0, 0, .7}
\definecolor{roetlich}{rgb}{1, .7, .7}
\definecolor{dunkelmagenta}{rgb}{.3, 0, .3}

\setlength{\unitlength}{1cm}
\begin{picture}(6, 8)
\linethickness{0.075mm}
\multiput(0, 0)(6, 0){2}{\line(0, 1){8}}
\multiput(0, 0)(0, 8){2}{\line(1, 0){6}}
\thicklines
\color{dunkelmagenta}
\put(1, .5){\line(2, 1){3}}
\put(4, 2){\line(-2, 1){2}}
\put(2, 3){\line(-2, -5){1}}
\put(.7, .3){\makebox(0,0)[cc]{B}}
\put(4.05, 1.9){\makebox(0,0)[cc]{B}}
\put(1.7, 2.95){\makebox(0,0)[cc]{C}}
\put(3.1, 2.5){\makebox(0,0)[cc]{a}}
\put(1.3, 1.7){\makebox(0,0)[cc]{b}}
\put(2.5, 1.05){\makebox(0,0)[cc]{c}}
\color{dunkelblau}
\put(0.3, 4){\makebox(0,0)[cc]{F=\sqrt{s(s-a)(s-b)(s-c)}}}
\end{picture}


\definecolor{cred}{rgb}{1, 0, 0}
\definecolor{cgreen}{rgb}{0, 1, 0}
\definecolor{cblue}{rgb}{0, 0, 1}
\setlength{\unitlength}{1mm}
\begin{picture}{60, 60}
\put(30, 30){\circle{14}}
\put(23, 23){\line(1, 0){14}}
\put(23, 23){\line(0, 1){14}}
\put(37, 37){\line(0, -1){14}}
\put(37, 37){\line(-1, 0){14}}
\color{cred}
\put(30, 23){\line(0, 1){14}}
\put(23, 30){\line(1, 0){14}}
\end{picture}

This is driving me crazy... :cry: Does anyone know why there's a text 0, 60 in the third picture? I didn't put any text there, it just appeared mysteriously... :frown:
The circle command is too small, since the diameter can only be 14 mm. I just wonder if there is a way to magnify the picture? Or to draw a larger circle?

[J77]

This is driving me crazy... :cry: Does anyone know why there's a text 0, 60 in the third picture? I didn't put any text there, it just appeared mysteriously... :frown:Your \begin{picture} command has curly brackets after it {60,60} instead of round (60,60)

[VietDao29]

Your \begin{picture} command has curly brackets after it {60,60} instead of round (60,60)
Ah, yes, thanks a lot. :blushing: Sometimes, I just mess up the round bracket, and the curly ones. :smile:

[VietDao29]

\frac{\pi ^2^2^2}{\log \cos \sin \tan
You forgot to type in the '}' at the end.
\frac{\pi ^2^2^2}{\log \cos \sin \tan }

[Water]

I'm having trouble trying to write mass times specific heat times delta T subscript copper to represent the internal energy of a piece of copper. This was one of my many unsuccessful attempts:

mc /Delta T_{copper}

How do you do it? :frown:

Testing: mc \partial_{x}. I hope the mc part appears. (Edit: Guess it didn't)

[robphy]

I'm having trouble trying to write mass times specific heat times delta T subscript copper to represent the internal energy of a piece of copper. This was one of my many unsuccessful attempts:

mc /Delta T_{copper}

How do you do it? :frown:


Use \Delta
mc \Delta T_{copper} <---click me

[Hyperreality]

Does anyone know how to use the Feynman diagram package in LaTex??

My Miktex has this "feynmf macros", how do I use it??

[sylas]

I am wanting to preview a post containing tex. But the preview tells me that it is being generated, and when I refresh to see the result, it then restarts the generation process.

I think.

Is there any way I can preview my tex before posting?

Thanks -- Sylas.

PS. I was trying to enter this:


\frac{\partial f}{\partial x} = \gamma
\\
\frac{\partial f}{\partial t} = \omega c
\\
\frac{\partial g}{\partial x} = \omega/c
\\
\frac{\partial g}{\partial t} = \gamma
\\
\gamma = ...

[robphy]

I am wanting to preview a post containing tex. But the preview tells me that it is being generated, and when I refresh to see the result, it then restarts the generation process.

I think.

Is there any way I can preview my tex before posting?

Thanks -- Sylas.


Unfortunately, it seems that wonderful feature was broken in an upgrade.

[mbrmbrg]

here is inline text x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}
and normal latexx=\frac{-b\pm \sqrt{b^2-4ac}}{2a}

lately the computer hasn't differentiated.

[mbrmbrg]

Ooh, look! itex uses littler font but still the white background!!:biggrin: :grumpy:

[oen_maclaude]

i guess there is something wrong in the pdf file in
http://www.physicsforums.com/misc/howtolatex.pdf

it should be /tex not \tex

[mbrmbrg]

i guess there is something wrong in the pdf file in
http://www.physicsforums.com/misc/howtolatex.pdf

it should be /tex not \tex

This post rather befuddled me, b/c I learned from that file and never had a problem...
Then I saw it--
although [ t e x ]...[ / t e x ] does appear twice., [ t e x ]...[ \ t e x ] appears once.
It's all in what you look for:smile: !

BTW, can anyone explain the itex \frac{7 days}{1 week} vs tex \frac{7 days}{1 week} deal?

[oen_maclaude]

This post rather befuddled me, b/c I learned from that file and never had a problem...
Then I saw it--
although [ t e x ]...[ / t e x ] does appear twice., [ t e x ]...[ \ t e x ] appears once.
It's all in what you look for:smile: !

BTW, can anyone explain the itex \frac{7 days}{1 week} vs tex \frac{7 days}{1 week} deal?

i guess it is better for articles to be consistent. just a thought. Anyway, thanks!

[Triss]

i guess it is better for articles to be consistent. just a thought. Anyway, thanks!

When you write articles, reports and such, you take much more advantage of latex than the forum does. here its just a mean to write readable mathematics. So what 'itex' tries to do is to mimic standard inline math ($ $) and 'tex' looks more like displaystyle math (\[ \]).

[mbrmbrg]

Hm. I thought itex was supposed to get rid of the white background, possibly w/o shrinking the font size. Then again, if it's to make it fit the line, of course a fraction has to be shrunk (shrunken?).

[MathematicalPhysicist]

hi, im using texniccenter, and i would appreciate if someone could sopt my errors in my code, and help me correct it.
here's the code:
\begin{normalsize}
\begin{document}
\begin{equation}
\normalsize
m\int\limits_{x_1}^{x_2}
\frac{dv}{dt}dx=\int\limits_'{x_1}^{x_2}F(x)dx
\nonumber\\
dx=\frac{dx}{dt}dt=vdt
\nonumber\\
m\int\limits_{x_1}^{x_2}\frac{dv}{dt}dx=m\int\limi ts_{t_1}^{t_2}\frac{dv}{dt}vdt
\nonumber\\
=\int\limits_{t_1}^{t_2}\frac(d}{dt}
(\frac{1}{2}v^2)dt=\frac{1}{2}m[v_2^2-v_1^2]
\end{equation}
\end{document}
\end{normalsize}

[Triss]

hi, im using texniccenter, and i would appreciate if someone could sopt my errors in my code, and help me correct it.
here's the code:
\begin{normalsize}
\begin{document}
\begin{equation}
\normalsize
m\int\limits_{x_1}^{x_2}
\frac{dv}{dt}dx=\int\limits_'{x_1}^{x_2}F(x)dx
\nonumber\\
dx=\frac{dx}{dt}dt=vdt
\nonumber\\
m\int\limits_{x_1}^{x_2}\frac{dv}{dt}dx=m\int\limi ts_{t_1}^{t_2}\frac{dv}{dt}vdt
\nonumber\\
=\int\limits_{t_1}^{t_2}\frac(d}{dt}
(\frac{1}{2}v^2)dt=\frac{1}{2}m[v_2^2-v_1^2]
\end{equation}
\end{document}
\end{normalsize}

It does not matter what program you used. If it will not compile it will not compile no matter the program you are useing.

First of all, *never* put any enviroments around, or outside your main document -- just doesn't work. \normalsize also does nothing for you in a math enviroment. a few other errors where in how you used \limits and \frac{}{}. The following compiles nicely


\documentclass{article}

%\begin{normalsize}
\begin{document}
\begin{equation}
%\normalsize
m\int\limits_{x_1}^{x_2}
\frac{dv}{dt}dx=\int\limits_{x_1}^{x_2}F(x)dx %removed '
\nonumber\\
dx=\frac{dx}{dt}dt=vdt
\nonumber\\
m\int\limits_{x_1}^{x_2}\frac{dv}{dt}dx=m\int\limi ts_{t_1}^{t_2}\frac{dv}{dt}vdt
\nonumber\\
=\int\limits_{t_1}^{t_2}\frac{d}{dt} %corrected ( => {
(\frac{1}{2}v^2)dt=\frac{1}{2}m[v_2^2-v_1^2]
\end{equation}
\end{document}
%\end{normalsize}

[HalfManHalfAmazing]

\oint E\cdot dA = \frac{Q_{enc}}{\epsilon_0}

Yahoo! Finally produced Gauss' Law in latex!

[Hootenanny]

Latex Transparency fixed in IE7 :approve:

[Orion1]

The circle command is too small, since the diameter can only be 14 mm. I just wonder if there is a way to magnify the picture? Or to draw a larger circle?

\]
\unitlength 0.02mm
\begin{picture}(4000,4000)(0,0)
\linethickness{3pt}
\textcolor{red}{
\qbezier( 4000, 2000)( 3996, 2125)( 3984, 2250)
\qbezier( 3984, 2250)( 3964, 2374)( 3937, 2497)
\qbezier( 3937, 2497)( 3902, 2618)( 3859, 2736)
\qbezier( 3859, 2736)( 3809, 2851)( 3752, 2963)
\qbezier( 3752, 2963)( 3688, 3071)( 3618, 3175)
\qbezier( 3618, 3175)( 3541, 3274)( 3457, 3369)
\qbezier( 3457, 3369)( 3369, 3457)( 3274, 3541)
\qbezier( 3274, 3541)( 3175, 3618)( 3071, 3688)
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\[

[kingyof2thejring]

[ tex ] a^x_n [ /tex ]

[kingyof2thejring]

\alpha^2\sin(x)

[kingyof2thejring]

\E_0.............

[kingyof2thejring]

\E_0..........

[kingyof2thejring]

E_0 E_1 .............

[kingyof2thejring]

(E_0-E_1+mc^2)^2=E^2_0

[kingyof2thejring]

(E_0-E_1+mc^2)^2=E^2_0

[kingyof2thejring]

(E_0-E_1+mc^2)^2=E^2_0+E^2_1 -2E_0E_1cos\theta +(mc^2)^2

[kingyof2thejring]

(E_0-E_1+mc^2)^2=E^2_0+E^2_1 -2E_0E_1cos\theta +(mc^2)^2
E^2_0- 2E_0E_1 +2E_0mc^2+E^2_1-2E_1mc^2 +m^2c^4=E^2_0+E^2_1 -2E_0E_1cos\theta +(mc^2)^2
2E_0mc^2-2E_1mc^2=-2E_0E_1cos\theta+2E_0E_1
2mc^2(E_0-E_1)=2E_0E_1(1-cos\theta)

E=E_0-E_1+mc^2 c^2p^2=E^2_0+E^2_1 -2E_0E_1cos\theta
E^2=c^2p^2+(mc^2)^2

[kingyof2thejring]

mc^2(\frac{hc}{\lambda_0}-\frac{hc}{\lambda_1})=\frac{hc}{\lambda_0}\frac{hc }{\lambda_1}(1-cos\theta)
hmc^3(\frac{1}{\lambda_0}-\frac{1}{\lambda_1})=\frac{h^2c^2}{\lambda_0\lambd a_1}(1-cos\theta)
\lambda_0\lambda_1(\frac{1}{\lambda_0}-\frac{1}{\lambda_1})=\frac{h^2c^2}{hmc^3}(1-cos\theta)
\lambda_1-\lambda_0=\frac{h}{mc}(1-cos\theta)

E_0=hf_0 f_0=\frac{c}{\lambda_0}
E_1=hf_1 f_1=\frac{c}{\lambda_1}

[Divisionbyzer0]

\oint E\cdot dA = \frac{Q_{enc}}{\epsilon_0}

Yahoo! Finally produced Gauss' Law in latex!

This would be better :biggrin: :

\oint_\mathcal{S} \mathbf{E} \cdot d\mathbf{A} = \frac{Q_\textrm{enc}}{\epsilon_0}

[b2386]

Hi all,

Here is my question:

In the E>U_0 potential barrier, there should be no reflected wave when the incident wave is at one of the transmisson resonances. Assuming that a beam of particles is incident at the first transmission resonance, E=U_0+(\frac{\pi^2 h^2}{2mL^2}), combine the continuity conditions to show that B=0. Here are the continuity conditions:

1st A+B=C+D

2nd k(A- B)=k^{'}(C-D)

3rd Ce^{ik^{'}L}+De^{-ik^{'}L}=Fe^{ikL}

4th k^{'}(Ce^{ik^{'}L}-De^{-ik^{'}L})=kFe^{ikL}

A couple more equations that we already know are k=\sqrt{\frac{2mE}{h^2}} and k^'=\sqrt{\frac{2m(E-U_0)}{h^2}

Here is my attempted solution:

I divided the 4th equation by K and then set equation 3 and 4 equal to each other. I then used the new equation to solve for C in terms of D giving me

C=De^{-2i \pi}\frac{k^{'}+k}{k^{'}-K} where I substituted \frac{\pi}{L} in for k'.

I substituted this result into the first equation to now give me

A+B={De^{-2i \pi}\frac{k^{'}+k}{k^{'}-K} + D.

Solving for D gives me

\frac{A+B}{e^{-2i \pi}\frac{k^{'}+k}{k^{'}-K} + 1} = D

Now, plugging in our solutions for D and C into the 2nd equation

\frac{(A+B)e^{-2i \pi}\frac{k^{'}+k}{k^{'}-K}}{e^{-2i \pi}\frac{k^{'}+k}{k^{'}-K}+1}-\frac{A+B}{e^{-2i \pi}\frac{k^{'}+k}{k^{'}-K}+1}=\frac{k}{k^{'}}(A-B})

At this point, it seems impossible to simplify the equation to a point where it is obvious that B = 0. Am I on the right track or is there an easier way?

[Couperin]

17(1-\frac{1}{17^2})^\frac{1}{2}

Does anyone know of a website that allows me to use tex code and generate latex graphics, that isn't necessarily part of a forum like this one?

BTW, the guy who coded LaTeX into this forum is a bloody wizard.

EDIT: God! LaTeX is amazing! I've been checking the examples in this thread... what an invention!

[Couperin]

Found one here: http://at.org/~cola/tex2img/index.php

(sorry for double post, I can't find the EDIT button...)

[actionintegral]

\frac{x-vt}{\sqrt{1-\frac{v^2}{c^2}}}
\frac{x-vt}{\sqrt{2}}
\sqrt{2}

[Greg Bernhardt]

For testing please use:
http://at.org/~cola/tex2img/index.php

[Greg Bernhardt]

Here is another latex preview tool suggested by Ranger

http://rogercortesi.com/eqn/index.php

[Doc Al]

FYI: Latex Command Window now available! (http://physicsforums.com/showthread.php?t=175231)

[chroot]

Test...

A = A'

- Warren

[chroot]

Test

E = mc^{10}

???