LaTeX Introducing LaTeX Math Typesetting

J77 · Aug 30, 2006

VietDao29 said:

This is driving me crazy... 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...

Your \begin{picture} command has curly brackets after it {60,60} instead of round (60,60)

VietDao29 · Sep 2, 2006

J77 said:

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.

VietDao29 · Sep 9, 2006

pavadrin said:

\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 · Sep 11, 2006

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?

Testing: mc \partial_{x}. I hope the mc part appears. (Edit: Guess it didn't)

robphy · Sep 12, 2006

Water said:

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?

Use \Delta
mc \Delta T_{copper} <---click me

Hyperreality · Sep 24, 2006

Feynman Diagram

Does anyone know how to use the Feynman diagram package in LaTex??

My Miktex has this "feynmf macros", how do I use it??

sylas · Sep 25, 2006

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 · Sep 26, 2006

sylas said:

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 · Oct 9, 2006

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 · Oct 9, 2006

Ooh, look! itex uses littler font but still the white background!

oen_maclaude · Oct 11, 2006

i guess there is something wrong in the pdf file in
https://www.physicsforums.com/misc/howtolatex.pdf

it should be /tex not \tex

mbrmbrg · Oct 12, 2006

oen_maclaude said:

i guess there is something wrong in the pdf file in
https://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

!

BTW, can anyone explain the itex \frac{7 days}{1 week} vs tex \frac{7 days}{1 week} deal?

oen_maclaude · Oct 15, 2006

mbrmbrg said:

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 !

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 · Oct 17, 2006

oen_maclaude said:

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 · Oct 17, 2006

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 · Oct 18, 2006

spot the error.

hi, I am 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\limits_{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 · Oct 20, 2006

loop quantum gravity said:

hi, I am 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\limits_{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

Code:

\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\limits_{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 · Oct 31, 2006

\oint E\cdot dA = \frac{Q_{enc}}{\epsilon_0}

Yahoo! Finally produced Gauss' Law in latex!

Hootenanny · Oct 31, 2006

Latex Transparency fixed in IE7 :approve:

Orion1 · Nov 3, 2006

VietDao29 said:

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) \qbezier( 3071, 3688)( 2963, 3752)( 2851, 3809) \qbezier( 2851, 3809)( 2736, 3859)( 2618, 3902) \qbezier( 2618, 3902)( 2497, 3937)( 2374, 3964) \qbezier( 2374, 3964)( 2250, 3984)( 2125, 3996) \qbezier( 2125, 3996)( 1999, 4000)( 1874, 3996) \qbezier( 1874, 3996)( 1749, 3984)( 1625, 3964) \qbezier( 1625, 3964)( 1502, 3937)( 1381, 3902) \qbezier( 1381, 3902)( 1263, 3859)( 1148, 3809) \qbezier( 1148, 3809)( 1036, 3752)( 928, 3688) \qbezier( 928, 3688)( 824, 3618)( 725, 3541) \qbezier( 725, 3541)( 630, 3457)( 542, 3369) \qbezier( 542, 3369)( 458, 3274)( 381, 3175) \qbezier( 381, 3175)( 311, 3071)( 247, 2963) \qbezier( 247, 2963)( 190, 2851)( 140, 2736) \qbezier( 140, 2736)( 97, 2618)( 62, 2497) \qbezier( 62, 2497)( 35, 2374)( 15, 2250) \qbezier( 15, 2250)( 3, 2125)( 0, 1999) \qbezier( 0, 1999)( 3, 1874)( 15, 1749) \qbezier( 15, 1749)( 35, 1625)( 62, 1502) \qbezier( 62, 1502)( 97, 1381)( 140, 1263) \qbezier( 140, 1263)( 190, 1148)( 247, 1036) \qbezier( 247, 1036)( 311, 928)( 381, 824) \qbezier( 381, 824)( 458, 725)( 542, 630) \qbezier( 542, 630)( 630, 542)( 725, 458) \qbezier( 725, 458)( 824, 381)( 928, 311) \qbezier( 928, 311)( 1036, 247)( 1148, 190) \qbezier( 1148, 190)( 1263, 140)( 1381, 97) \qbezier( 1381, 97)( 1502, 62)( 1625, 35) \qbezier( 1625, 35)( 1749, 15)( 1874, 3) \qbezier( 1874, 3)( 1999, 0)( 2125, 3) \qbezier( 2125, 3)( 2250, 15)( 2374, 35) \qbezier( 2374, 35)( 2497, 62)( 2618, 97) \qbezier( 2618, 97)( 2736, 140)( 2851, 190) \qbezier( 2851, 190)( 2963, 247)( 3071, 311) \qbezier( 3071, 311)( 3175, 381)( 3274, 458) \qbezier( 3274, 458)( 3369, 542)( 3457, 630) \qbezier( 3457, 630)( 3541, 725)( 3618, 824) \qbezier( 3618, 824)( 3688, 928)( 3752, 1036) \qbezier( 3752, 1036)( 3809, 1148)( 3859, 1263) \qbezier( 3859, 1263)( 3902, 1381)( 3937, 1502) \qbezier( 3937, 1502)( 3964, 1625)( 3984, 1749) \qbezier( 3984, 1749)( 3996, 1874)( 4000, 1999) } \end{picture} \[ 

 \] \unitlength 0.02mm \begin{picture}(4000,4000)(0,0) \linethickness{3pt} \textcolor{blue}{ \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) \qbezier( 3071, 3688)( 2963, 3752)( 2851, 3809) \qbezier( 2851, 3809)( 2736, 3859)( 2618, 3902) \qbezier( 2618, 3902)( 2497, 3937)( 2374, 3964) \qbezier( 2374, 3964)( 2250, 3984)( 2125, 3996) \qbezier( 2125, 3996)( 1999, 4000)( 1874, 3996) \qbezier( 1874, 3996)( 1749, 3984)( 1625, 3964) \qbezier( 1625, 3964)( 1502, 3937)( 1381, 3902) \qbezier( 1381, 3902)( 1263, 3859)( 1148, 3809) \qbezier( 1148, 3809)( 1036, 3752)( 928, 3688) \qbezier( 928, 3688)( 824, 3618)( 725, 3541) \qbezier( 725, 3541)( 630, 3457)( 542, 3369) \qbezier( 542, 3369)( 458, 3274)( 381, 3175) \qbezier( 381, 3175)( 311, 3071)( 247, 2963) \qbezier( 247, 2963)( 190, 2851)( 140, 2736) \qbezier( 140, 2736)( 97, 2618)( 62, 2497) \qbezier( 62, 2497)( 35, 2374)( 15, 2250) \qbezier( 15, 2250)( 3, 2125)( 0, 1999) \qbezier( 0, 1999)( 3, 1874)( 15, 1749) \qbezier( 15, 1749)( 35, 1625)( 62, 1502) \qbezier( 62, 1502)( 97, 1381)( 140, 1263) \qbezier( 140, 1263)( 190, 1148)( 247, 1036) \qbezier( 247, 1036)( 311, 928)( 381, 824) \qbezier( 381, 824)( 458, 725)( 542, 630) \qbezier( 542, 630)( 630, 542)( 725, 458) \qbezier( 725, 458)( 824, 381)( 928, 311) \qbezier( 928, 311)( 1036, 247)( 1148, 190) \qbezier( 1148, 190)( 1263, 140)( 1381, 97) \qbezier( 1381, 97)( 1502, 62)( 1625, 35) \qbezier( 1625, 35)( 1749, 15)( 1874, 3) \qbezier( 1874, 3)( 1999, 0)( 2125, 3) \qbezier( 2125, 3)( 2250, 15)( 2374, 35) \qbezier( 2374, 35)( 2497, 62)( 2618, 97) \qbezier( 2618, 97)( 2736, 140)( 2851, 190) \qbezier( 2851, 190)( 2963, 247)( 3071, 311) \qbezier( 3071, 311)( 3175, 381)( 3274, 458) \qbezier( 3274, 458)( 3369, 542)( 3457, 630) \qbezier( 3457, 630)( 3541, 725)( 3618, 824) \qbezier( 3618, 824)( 3688, 928)( 3752, 1036) \qbezier( 3752, 1036)( 3809, 1148)( 3859, 1263) \qbezier( 3859, 1263)( 3902, 1381)( 3937, 1502) \qbezier( 3937, 1502)( 3964, 1625)( 3984, 1749) \qbezier( 3984, 1749)( 3996, 1874)( 4000, 1999) } \thicklines {\color{red}\put(2000, 2000){\vector(1, 0){2000}}} {\color{orange}\put(2000, 2000){\vector(4, 1){1000}}} {\color{yellow}\put(2000, 2000){\vector(3, 1){1500}}} {\color{green}\put(2000, 2000){\vector(2, 1){2000}}} {\color{blue}\put(2000, 2000){\vector(1, 2){500}}} \thicklines \put(2000, 2000){\vector(-4, 1){2000}} \put(2000, 2000){\vector(-1, 4){500}} \thinlines \put(2000, 2000){\vector(-1, -1){500}} \put(2000, 2000){\vector(-1, -4){500}} \end{picture} \[

kingyof2thejring · Nov 7, 2006

\alpha^2\sin(x)

kingyof2thejring · Nov 7, 2006

(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 · Nov 7, 2006

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\lambda_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 · Nov 8, 2006

HalfManHalfAmazing said:

\oint E\cdot dA = \frac{Q_{enc}}{\epsilon_0}

Yahoo! Finally produced Gauss' Law in latex!

This would be better

:

\oint_\mathcal{S} \mathbf{E} \cdot d\mathbf{A} = \frac{Q_\textrm{enc}}{\epsilon_0}

b2386 · Nov 10, 2006

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 · Nov 12, 2006

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 · Nov 15, 2006

Found one here: http://at.org/~cola/tex2img/index.php

(sorry for double post, I can't find the EDIT button...)

actionintegral · Nov 15, 2006

\frac{x-vt}{\sqrt{1-\frac{v^2}{c^2}}}
\frac{x-vt}{\sqrt{2}}
\sqrt{2}

Greg Bernhardt · Nov 15, 2006

For testing please use:
http://at.org/~cola/tex2img/index.php

Greg Bernhardt · Jan 21, 2007

Here is another latex preview tool suggested by Ranger

http://rogercortesi.com/eqn/index.php

LaTeX Introducing LaTeX Math Typesetting

Similar threads

GNU Octave vs Wolfram Alpha

Wrapfig leaves text permanently curtailed thereafter

Mathematica NDSolve with Quantities

Mathematica NDSolve with forcing function via "digital waveguide"

Spaces when using widetext in latex

Insights Thinking Outside The Box Versus Knowing What’s In The Box

Insights Why Entangled Photon-Polarization Qubits Violate Bell’s Inequality

Insights Quantum Entanglement is a Kinematic Fact, not a Dynamical Effect

Insights What Exactly is Dirac’s Delta Function? - Insight

Insights Relativator (Circular Slide-Rule): Simulated with Desmos - Insight

Insights Fixing Things Which Can Go Wrong With Complex Numbers