LaTeX Introducing LaTeX Math Typesetting

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Physics Forums has integrated LaTeX mathematical typesetting into its platform, allowing users to create visually appealing mathematical expressions using markup similar to HTML. Users can include LaTeX graphics in posts by wrapping their code in [tex] or [itex] tags for display or inline formatting, respectively. A PDF guide with essential LaTeX commands and symbols is available, along with links to additional resources. The community is encouraged to experiment with the system and share examples, while also being mindful of server load when generating graphics. This addition aims to enhance the clarity and professionalism of mathematical discussions on the forum.
  • #601
Testing...

\vec{F} = m \vec{a}

white background? Blech!
 
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  • #602
In line testing \vec{F} = m \vec{a}
 
  • #603
re-test of an old example

robphy said:
\begin{align}<br /> x&amp; = y &amp;&amp; \text{def}\\<br /> &amp; = y+\textcolor{blue}{(y-y)} &amp;&amp; \text{add \textcolor{blue}{zero}}\\<br /> &amp; = 2y-y &amp;&amp; \text {\textcolor{red}{algebra}}<br /> \end{align}

very plain text, slightlyfanciertext, loud text

<br /> \]<br /> <br /> \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}}<br /> \put(0,0){\vector(1,4){170}}<br /> \put(50,50){\circle*{10}} <br /> \put(160,40){\framebox(80,40)[r]{ \textcolor{blue}{\bf \[ x_{Bob} \] } } }<br /> \put(40,160){\textcolor{yellow}{\dashbox(80,40)[t]{ \textcolor{red}{ \[ t_{Bob} \] } } }}<br /> <br /> \qbezier(100,100)(200,100)(200,200)<br /> \linethickness{8pt} <br /> \textcolor{green}{\qbezier(0,0)(0,100)(100,100)}<br /> \linethickness{1pt} <br /> \qbezier(0,0)(0,100)(100,100)<br /> <br /> \end{picture}<br /> \[

<br /> \newcommand{\VARTEXT}[2][\scriptsize]{\left(\mbox{#1\begin{tabular}{c}#2\end{tabular}}\right)}<br /> \VARTEXT[\large]{net-work done \\ on the object }<br /> =<br /> \VARTEXT[\large]{change in \\ the kinetic energy \\ of the object }
Transparency broken?
 
  • #604
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.
 
  • #605
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.

<br /> \] <br /> \unitlength 1mm <br /> \begin{picture}(55,90)(0,0) <br /> \linethickness{0.3mm} <br /> \put(20,10){\line(0,1){80}} <br /> \linethickness{0.3mm} <br /> \multiput(20,90)(0.12,-0.12){250}{\line(1,0){0.12}} <br /> \linethickness{0.3mm} <br /> \multiput(20,30)(0.12,0.12){250}{\line(1,0){0.12}} <br /> \linethickness{0.3mm} <br /> \multiput(20,10)(0.12,0.2){250}{\line(0,1){0.2}} <br /> \put(15,30){\makebox(0,0)[cc]{t}} <br /> \put(15,60){\makebox(0,0)[cc]{\gamma t}} <br /> \put(15,90){\makebox(0,0)[cc]{k^2t}} <br /> \put(55,60){\makebox(0,0)[cc]{kt}} <br /> \end{picture} <br /> \[ <br />
 
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  • #606
robphy said:
<br /> \] <br /> \unitlength 1mm <br /> \begin{picture}(55,90)(0,0) <br /> \linethickness{0.3mm} <br /> \put(20,10){\line(0,1){80}} <br /> \linethickness{0.3mm} <br /> \multiput(20,90)(0.12,-0.12){250}{\line(1,0){0.12}} <br /> \linethickness{0.3mm} <br /> \multiput(20,30)(0.12,0.12){250}{\line(1,0){0.12}} <br /> \linethickness{0.3mm} <br /> \multiput(20,10)(0.12,0.2){250}{\line(0,1){0.2}} <br /> \put(15,30){\makebox(0,0)[cc]{t}} <br /> \put(15,60){\makebox(0,0)[cc]{\gamma t}} <br /> \put(15,90){\makebox(0,0)[cc]{k^2t}} <br /> \put(55,60){\makebox(0,0)[cc]{kt}} <br /> \end{picture} <br /> \[ <br />

Testing transparency.. 13

- Warren
 
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  • #607
robphy said:
<br /> \] <br /> \unitlength 1mm <br /> \begin{picture}(55,90)(0,0) <br /> \linethickness{0.3mm} <br /> \put(20,10){\line(0,1){80}} <br /> \linethickness{0.3mm} <br /> \multiput(20,90)(0.12,-0.12){250}{\line(1,0){0.12}} <br /> \linethickness{0.3mm} <br /> \multiput(20,30)(0.12,0.12){250}{\line(1,0){0.12}} <br /> \linethickness{0.3mm} <br /> \multiput(20,10)(0.12,0.2){250}{\line(0,1){0.2}} <br /> \put(15,30){\makebox(0,0)[cc]{t}} <br /> \put(15,60){\makebox(0,0)[cc]{\gamma t}} <br /> \put(15,90){\makebox(0,0)[cc]{k^2t}} <br /> \put(55,60){\makebox(0,0)[cc]{kt}} <br /> \end{picture} <br /> \[ <br />

<br /> \] <br /> \unitlength 1mm <br /> \begin{picture}(55,90)(0,0) <br /> \linethickness{0.3mm} <br /> \put(20,10){\line(0,1){80}} <br /> \linethickness{0.3mm} <br /> \multiput(20,90)(0.12,-0.12){250}{\line(1,0){0.12}} <br /> \linethickness{0.3mm} <br /> \multiput(20,30)(0.12,0.12){250}{\line(1,0){0.12}} <br /> \linethickness{0.3mm} <br /> \multiput(20,10)(0.12,0.2){250}{\line(0,1){0.2}} <br /> \put(15,30){\makebox(0,0)[cc]{t}} <br /> \put(15,60){\makebox(0,0)[cc]{\gamma t}} <br /> \put(15,90){\makebox(0,0)[cc]{k^2t}} <br /> \put(55,60){\makebox(0,0)[cc]{kt}} <br /> \end{picture} <br /> \[ <br />

Testing transparency.. 53

- Warren
 
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  • #608
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)?
 
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  • #609
I'm calling pnmtopng with -transparency =rgb:ff/ff/ff, which should turn all the white pixels transparent (and the latex itself forces an #black 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
 
  • #610
AKG said:
0 &lt; k \leq m &lt; n,\ \ \gcd\left({{n}\choose{k}},{{n}\choose{m}}\right) &gt; 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}} &gt; {{m}\choose{k}}

\gcd\left({{n}\choose{k}},{{n}\choose{m}}\right) &gt; 1

Another test...

- Warren
 
  • #611
Another test of aliasing... 8

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

- Warren
 
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  • #612
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
 
  • #614
chroot said:
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
Why doesn't the old tex work?
 
  • #615
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
 
  • #616
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.
 
  • #617
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
 
  • #618
robphy said:
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
 
  • #619
chroot said:
Another test of aliasing... 9

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

- Warren

<br /> e^x = \sum_{n=0}^\infty \frac{x^n}{n!} = \lim_{n\rightarrow\infty} (1+x/n)^n<br />- Warren
 
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  • #620
<br /> \mathop {\lim }\limits_{n \to \infty } \bigcup\limits_{i = 0}^{n!} {\left\{ {\frac{i}{{n!}}} \right\}} = \mathbb{Q} \cap \left[ {0,1} \right]
 
  • #621
Testing...

<br /> E_n = /frac{n^2/pi^2}{(L+2/delta)^2}<br />

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.
 
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  • #622
<br /> E_n = \frac{n^2\pi^2}{(L+2\delta)^2}.<br />

Your slashes are backwards.
And I believe the tags have to be lowercase.

Kazza_765 said:
Testing...

<br /> E_n = /frac{n^2/pi^2}{(L+2/delta)^2}<br />

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.
 
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  • #623
lemme try:

<br /> E_n = \frac{n^2 \pi^2}{(L + 2 \delta)^2}<br />
 
  • #624
<br /> E_n = \frac{n^2 \pi^2}{(L + 2 \delta)^2}<br />
Yes, a slight improvement. (The gamma modification?)
 
  • #625
robphy said:
<br /> E_n = \frac{n^2 \pi^2}{(L + 2 \delta)^2}<br />
Testing \vec{F} = m \vec{a}

Yikes... worse than ever. :cry:
 
  • #626
Doc Al said:
Testing \vec{F} = m \vec{a}

Yikes... worse than ever. :cry:

Using IE?
Transparency seems okay in Firefox (1.0.7).
 
  • #627
\fbox{\LaTeX}
 
  • #628
Doc Al said:
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.
 
  • #629
Somethings wrong with the AA again :frown:

V = \int \pi \left[ f(x) \right]^2

I'm using firefox.
 
  • #630
I've had trouble with .png transparency in IE before. The only way i got around that was by using transparent .gifs. I know 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 http://www.forkosh.dreamhost.com/source_mimetex.html#introduction can be compiled with anti-aliasing on.
 
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