<\body> The contains the default textual environments. They are subdivided into the following groups: <\description> The bodies of theorem-like environments are usually emphasized. By default, the following such environments are available via : , , , , , , , . The following ones are available via : , , , , . Two such environments are provided by default and available via : and . These environments always come by pairs: big and small ones. By default, we provide , , and . You can access them through and . We provide and (for the subject classification). These environments should be entered at the interior of an . <\initial> <\collection>