
%BEGINLATEXPREAMBLE%
 \usepackage{amsfonts}
 \definecolor{Lightmaroon}{rgb}{0.6667,0,0}
 \definecolor{Cornflowerblue}{rgb}{0,0.4,0.8}
%ENDLATEXPREAMBLE%


---++ Introduction to %BEGINLATEX{inline="1" color="Lightmaroon"}%\Large\LaTeX%ENDLATEX%

%BEGINLATEX{inline="1"}%\LaTeX%ENDLATEX% is a complete typesetting language developed by Leslie Lamport on top of Donald Knuth's %BEGINLATEX{inline="1"}%\TeX%ENDLATEX%. Most of it is implemented using TWiki.LatexModePlugin, but the main use is producing mathematics, since most other formatting is more conveniently accomplished using Wiki constructs. To produce mathematics _in-line_, the  %BEGINLATEX{inline="1"}%\LaTeX%ENDLATEX% text must be surrounded by %BROWN%%<nop>$%ENDCOLOR%
and %BROWN%$%%ENDCOLOR%. Thus, <verbatim>%$\Gamma \vdash Rx_1\cdots x_n$%</verbatim> looks like this
%$\Gamma \vdash Rx_1\cdots x_n$%
in the middle of some text. To _display_ mathematics, it must be surrounded by %BROWN%%<nop>\[%ENDCOLOR%
and %BROWN%\]%%ENDCOLOR%. Thus, %BROWN%%<nop>\[\mathcal{N}=\langle \mathbb{N},0,1+,\cdot \rangle \subseteq \langle \mathbb{R},0,1+,\cdot \rangle\]%%ENDCOLOR% produces this centered display %\[\mathcal{N}=\langle \mathbb{N},0,1+,\cdot \rangle \subseteq \langle \mathbb{R},0,1+,\cdot \rangle\]% in the middle of a paragraph, which is preferable for long formulas or ones requiring emphasis.

%BEGINLATEX{inline="1"}%\LaTeX%ENDLATEX% is used by most mathematicians, physicists, and engineers for mathematics, and articles and books are typically submitted for publication in %BEGINLATEX{inline="1"}%\LaTeX%ENDLATEX%. There are therefore many helpful web sites, newsgroups, and books about %BEGINLATEX{inline="1"}%\LaTeX%ENDLATEX%. The standard complete reference is Lamport's [[http://www.amazon.com/exec/obidos/tg/detail/-/0201529831/102-6948132-3441705?v=glance][LaTeX: A Document Preparation System (2nd Edition)]]. The place to start on the web is the [[http://www.tug.org/][%BEGINLATEX{color="Cornflowerblue" inline="1"}%\TeX%ENDLATEX% Users Group]].

---+++Brief Tutorial on %BEGINLATEX{inline="1" color="Lightmaroon"}%\bf\LaTeX%ENDLATEX%

All %BEGINLATEX{inline="1"}%\TeX%ENDLATEX% codes begin with a backslash (\). Curly braces ({ }) are used to delimit groupings, except in a few cases where optional arguments must be enclosed in square brackets ([ ]). Many symbols have mnemonic names, like =\Alpha=, =\alpha=, =\forall=, =\exists=, =\lor=, =\land=. 

A list of some common symbols is given in the LatexSymbols topic.  Other off-site lists include:  [[http://www.math.union.edu/~dpvc/jsMath/symbols/welcome.html][Some Symbols]] and [[http://www.iam.ubc.ca/~newbury/tex/symbols.html][Some Little-Known Symbols]], [[http://www.ctan.org/tex-archive/info/symbols/comprehensive/symbols-a4.pdf][All the Symbols]].  Not all the symbols work in the Wiki, but most of them do.

A subscript is indicated with an underline (_). If the subscript consists of more than one symbol, it must be enclosed in braces. Similarly, a superscript is indicated with a caret (^). Thus, %BROWN%%<nop>$ \alpha _{ \beta _1^2}^{ \gamma ^{ \delta ^ \epsilon }}
$%%ENDCOLOR% yields %$ \alpha _{ \beta _1^2}^{ \gamma ^{ \delta^ \epsilon }}$%,

---+++Document Structure

In standard 
%BEGINLATEX{inline="1"}%\LaTeX%ENDLATEX%
2e documents, the main file has the following
structure:
<div style="border-style:solid; border-width: 1px; border-color:#666; width:80%;">
=\documentclass[<i>options</i>]{<i>class</i>}=

<i>preamble</i>

=\begin{document}=

<i>text</i>

=\end{document}=
</div>

Any text that normally goes in the _preamble_ or _text_ sections of the
template above can be rendered in TWiki.  The _preamble_ is typically used
to define new commands, or use !LaTeX style-files to extend !LaTeX's
functionality.  The _text_ area contains the actual text to be rendered.
One does not need to use the =\documentclass= or =document= environment to
use !LaTeX in TWiki.

The ability to render a complete !LaTeX document within TWiki, say from an
existing file, is currently under consideration.  See
TWiki:Codev.IncludeExistingLatexDocsInTWiki for details and current status.

-- courtesy of TWiki:Main.ShaughanLavine ([[http://zillion.philosophy.arizona.edu/twiki/bin/view/Courses/LaTeX][see also]])
