Introducing LaTeX Math Typesetting

[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:
https://www.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, 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:
https://www.physicsforums.com/showpost.php?p=996129&postcount=720
https://www.physicsforums.com/showpost.php?p=969925&postcount=695

fancy examples:
https://www.physicsforums.com/showpost.php?p=968227&postcount=689 [my first example with \qbezier]
https://www.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]

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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]

latex help

friends, i have an equation which is to be typeset in latex. will anyone 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]

How do I get daggers for foonotes?

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$^\dagger$

$^\dagger$Do you mean like this?

 

[buddyholly9999]

figured it out...

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