The Org Mode 7 Reference Manual
by Carsten Dominik and others Paperback (6"x9"), 282 pages ISBN 9781906966089 RRP £9.95 ($14.95) Sales of this book support the Org project! Get a printed copy>>> 
11.7.3 LaTeX fragments
Going beyond symbols and sub and superscripts, a full formula language is needed. Orgmode can contain LaTeX math fragments, and it supports ways to process these for several export backends. When exporting to LaTeX, the code is obviously left as it is. When exporting to HTML, Org invokes the MathJax library (see section 12.5.6 Math formatting in HTML export) to process and display the math.^{(100)} Finally, it can also process the mathematical expressions into images^{(101)} that can be displayed in a browser or in DocBook documents.
LaTeX fragments don't need any special marking at all. The following snippets will be identified as LaTeX source code:

Environments of any kind.^{(102)} The only
requirement is that the
\begin
statement appears on a new line, preceded by only whitespace.  Text within the usual LaTeX math delimiters. To avoid conflicts with currency specifications, single ‘$’ characters are only recognized as math delimiters if the enclosed text contains at most two line breaks, is directly attached to the ‘$’ characters with no whitespace in between, and if the closing ‘$’ is followed by whitespace, punctuation or a dash. For the other delimiters, there is no such restriction, so when in doubt, use ‘\(...\)’ as inline math delimiters.
For example:
\begin{equation} % arbitrary environments, x=\sqrt{b} % even tables, figures \end{equation} % etc If $a^2=b$ and \( b=2 \), then the solution must be either $$ a=+\sqrt{2} $$ or \[ a=\sqrt{2} \].
If you need any of the delimiter ASCII sequences for other purposes, you
can configure the option orgformatlatexoptions
to deselect the
ones you do not wish to have interpreted by the LaTeX converter.
LaTeX processing can be configured with the variable
orgexportwithLaTeXfragments
. The default setting is t
which means ‘MathJax’ for HTML, and no processing for DocBook, ASCII and
LaTeX backends. You can also set this variable on a perfile basis using one
of these lines:
#+OPTIONS: LaTeX:t Do the right thing automatically (MathJax) #+OPTIONS: LaTeX:dvipng Force using dvipng images #+OPTIONS: LaTeX:nil Do not process LaTeX fragments at all #+OPTIONS: LaTeX:verbatim Verbatim export, for jsMath or so
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