# Hypertext Help with LaTeX
\newtheorem

`\newtheorem{env_name}{caption}[within]` `\newtheorem{env_name}[numbered_like]{caption}`

This command defines a theorem-like environment.

- `env_name` The name of the environment -- a string of letters. Must not be the name of an existing environment or counter.

- `caption` The text printed at the beginning of the environment, right before the number.

- `within` The name of an already defined counter, usually of a sectional unit. Provides a means of resetting the new theorem counter within the sectional unit.

- `numbered_like` The name of an already defined theorem-like environment.

The `\newtheorem` command may have at most one optional argument.

Go back to Definitions
Go to LaTeX Table of Contents