Introducing LaTeX Math Typesetting

[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 :)

 

[Captain Zappo]

How do I insert a line break?

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?

https://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]

Circles and Beyond

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, https://www.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?

 

[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, slightly^fancier_text, 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