A package that facilitates the kind of theorem setup typically needed in American Mathematical Society publications. The package offers the theorem setup of the AMS document classes (amsart, amsbook, etc.) encapsulated in LaTeX package form so that it can be used with other document classes.
amsthm package provides an enhanced version of LaTeX's
\newtheorem command for defining theorem-like environments. The enhanced
\newtheorem recognizes a
\theoremstyle specification (as in Mittelbach's
theorem package) and has a
* form for defining unnumbered environments. The
amsthm package also defines a
proof environment that automatically adds a QED symbol at the end. AMS document classes incorporate the
amsthm package, so everything described here applies to them as well.
amsthm package is used with a non-AMS document class and with the
amsthm must be loaded after