$\LaTeX$ is a typesetting language that is particularly well suited to typing and publishing mathematics. The Math Department maintains an installation of $\LaTeX2e$ on all departmentally owned systems.
An excellent resource for $\LaTeX$ information, examples and documentation is available in the form of a WikiBooks. If you are new to $\LaTeX$ or have questions about how to accomplish a specific task please check out the WikiBook here:
Another good resource for $\TeX$/$\LaTeX$ information is TeXample.net.
For and introduction on how to use $\LaTeX$ on one of the Department of Mathematics computers see the $\LaTeX$ FAQ page.
Installation on Personal Computers
$\LaTeX$ is free and has been is available for all major computing platforms. To install \$LaTeX$ on your personal computer simply follow the instructions below for your operating system:
Mac OS X
The easiest way to install $\LaTeX$ on Mac OS X is to use the MacTeX installer, available here:
The download is fairly large (~2 GB) and may take some time depending on the speed of your internet connection. Once the download has completed simply double click the MacTeX.pkg file and follow the on-screen insturctions. After installation a number of $\TeX$ related applications will be available in Applications -> TeX.
Installation on Linux systems will vary depending on the distribution you are using. Many distributions include pre-packaged versions of $\LaTeX$, consult your distribution documentation.
If your distribution does not contain the most recent copy of $\TeX$ you can manually install a local copy using the $\TeX$-Live installer. Details can be found here: http://tug.org/texlive/quickinstall.html
Windows users can install MiKTeX using the installers linked below. Installers are available for both 32- and 64-bit systems: