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Mathematica runs on many platforms, including Mac OS X. This page is written from a Mac OS X perspective, but if you're on a different platform you may still get some useful information here. In the past, I've also heavily used Mathematica on UNIX and Windows systems, and you shouldn't have any trouble adapting what I'm writing here to those other platforms. However, I have to leave that as an exercise for the reader.
This is a guide to the LaTeX markup language. It is intended to form a useful resource for everybody from new users who wish to learn, to old hands who need a quick reference. TeX and LaTeX TeX is a computer program for typesetting documents, created by D. E. Knuth.
What is this? Anyone who works with LaTeX knows how time-consuming it can be to find a symbol in symbols-a4.pdf that you just can't memorize. Detexify is an attempt to simplify this search.