Using an AMS package in a / document

A `package'package in / terminology is an extension written in such a form that it can be used via the usepackage command. Many of the principal features of / are provided in separate packages so that they can be used individually on demand. The amsmath package is perhaps the single most noteworthy package, as it subsumes the amstext, amsbsy, and amsopn packages, and provides a number of other enhancements for mathematical typesetting. The current list of packages is:

amsmath

Defines extra environments for multiline displayed equations, as well as a number of other enhancements for math.

amstext

Provides a text command for typesetting a fragment of text inside a display.

amsbsy

Defines boldsymbol and pmb `poor man's bold' commands.

amsopn

Provides DeclareMathOperator for defining new `operator names' like sin and lim.

amsthm

Provides a proof environment and extensions for the newtheorem command.

amsintx

Provides more descriptive command syntax for integrals and sums.

amscd

Provides a CD environment for simple commutative diagrams (no support for diagonal arrows).

amsxtra

Provides certain odds and ends such as fracwithdelims and accentedsymbol.

upref

Makes ref print cross-reference numbers always in an upright/roman font regardless of context.