AMS-LaTeX is a collection of LaTeX document classes and packages developed for the American Mathematical Society (AMS).

[1] It has largely superseded the plain TeX macro package AMS-TeX.

AMS-TeX was originally written by Michael Spivak, and was used by the AMS from 1983 to 1985.

[2] The following code of the LaTeX2e produces the AMS-LaTeX logo: The package has a suite of facilities to format multi-line equations.

For example, the following code, causes the equals signs in the two lines to be aligned with one another, like this: AMS-LaTeX also includes many flexible commands for formatting and numbering theorems, lemmas, etc.