Introducing LaTeX Math Typesetting

[Doc Al]

Testing...

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

white background? Blech!

 

[Doc Al]

In line testing $\vec{F} = m \vec{a}$

 

[robphy]

re-test of an old example

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

very plain text, slightly^fancier_text, loud text

$\]<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 /> \[$

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

Transparency broken?

 

[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.

$$\] <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 /> \[$$

 

[chroot]

$$\] <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 /> \[$$

Testing transparency.. 13

- Warren

 

[chroot]

$$\] <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 /> \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 /> \[$$

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 #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

 

[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 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.

- Warren

Why 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.

- 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.

 

[robphy]

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

Yikes... worse than ever.

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.

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

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

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 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.

Actually, i just found out http://www.forkosh.dreamhost.com/source_mimetex.html#introduction can be compiled with anti-aliasing on.