## Hypertext Help with LaTeX

### eqnarray

\begin{eqnarray[*]} var_1 & rel_1 & eq1 \\ var_2 & rel_2 & eq2 \\ .... \end{eqnarray[*]}

The eqnarray environment is typically used to display a
sequence of equations or inequalities; it may also be used to
manage spacing for long equations. The
`\lefteqn` command is useful
in this environment for splitting long equations over several
lines.

It is very much like a three-column
array environment, with position
argument `rcl`, i.e., the columns are justified right,
center, and left, respectively. (However,
`\multicolumn` may not be
used.)

Consecutive rows are separated by
`\\` commands and consecutive
items within a row separated by an `&`. Any item may
be empty, i.e., no text.

A separate equation number is placed on every line unless
that line has a `\nonumber` command. The optional
`eqnarray*` form does not generate any equation numbers.

A `\label` command anywhere
within a row generates a reference to that row's number.

Related topics

- Environments
- LaTeX Modes
- Array Environment
- Equation Environment
- Displaymath Environment
- Math Formulas

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Revised 26 Jun 1995.