## 15 Math Extensions with *AMS*-LATEX

The American Mathematical Society, *AMS*, has supported the development and usage of TEX since its first release. Shortly after TEX 82 became available, the *AMS* produced a macro package for generating a special format `amstex`

, described in *The Joy of TEX* by Spivak (1990). The macros in this *AMS*-TEX complement the mathematical typesetting features of Plain TEX by adding additional ones and simplifying others.

However, *AMS*-TEX is not a documentation preparation system like LATEX, describing the logical layout of a document by means of markup commands, but rather is simply an extension to Plain TEX.

The great popularity of TEX as a text formatting program is due primarily to the availability of LATEX as a user-friendly ...

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