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<html>
<head><title>Help On LaTeX eqnarray</title></head>
<body bgcolor="#ffffff" text="#000000" link="#000099" vlink="#cc0000" alink="#cc0000">
<h1><font size="-2">Hypertext Help with LaTeX</font><br><font color="#cc0000">eqnarray</font></h1>
<p>
<p><pre>
<tt>\begin{eqnarray[*]}
var_1 & rel_1 & eq1 \\
var_2 & rel_2 & eq2 \\
....
\end{eqnarray[*]}</tt>
</pre>
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 <a href="lefteqn.html"><tt>\lefteqn</tt></a> command is useful in
this environment for splitting long equations over several lines.
<p>
It is very much like a three-column
<a href="ltx-202.html">array environment</a>, with position argument <tt>rcl</tt>,
i.e., the columns are justified right, center, and left, respectively.
(However, <a href="ltx-268.html"><tt>\multicolumn</tt></a> may not be used.)
<p>
Consecutive rows are separated by <a href="ltx-181.html"><tt>\\</tt></a>
commands and consecutive items within a
row separated by an <tt>&</tt>. Any item may be empty, i.e., no text.
<p>
A separate equation number is placed on every
line unless that line has a <tt>\nonumber</tt> command.
The optional <tt>eqnarray*</tt> form does not generate any equation numbers.
<p>
A <a href="ltx-252.html"><tt>\label</tt></a> command anywhere within a
row generates a reference to that row's number.
<hr>
Related topics
<ul>
<li><A href="ltx-27.html">Environments</A>
<li><a href="ltx-130.html">LaTeX Modes</a>
<li><a href="ltx-202.html">Array Environment</a>
<li><a href="ltx-224.html">Equation Environment</a>
<li><a href="ltx-421.html">Displaymath Environment</a>
<li><a href="ltx-115.html">Math Formulas</a>
</ul>
Return to <a href="ltx-2.html">LaTeX Table of Contents</a>
<hr>
<address>
Revised: Sheldon Green, 26 Jun 1995.
</address>
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