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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://docbook.org/ns/docbook" xml:id="function.gmp-legendre">
<refnamediv>
<refname>gmp_legendre</refname>
<refpurpose>Legendre symbol</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>int</type><methodname>gmp_legendre</methodname>
<methodparam><type class="union"><type>GMP</type><type>int</type><type>string</type></type><parameter>num1</parameter></methodparam>
<methodparam><type class="union"><type>GMP</type><type>int</type><type>string</type></type><parameter>num2</parameter></methodparam>
</methodsynopsis>
<para>
Compute the
<link xlink:href="&url.symbole-legendre;">
Legendre symbol</link> of <parameter>num1</parameter> and
<parameter>num2</parameter>. <parameter>num2</parameter> should be odd
and must be positive.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>num1</parameter></term>
<listitem>
&gmp.parameter;
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>num2</parameter></term>
<listitem>
&gmp.parameter;
<para>
Should be odd and must be positive.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&gmp.return;
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>gmp_legendre</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
echo gmp_legendre("1", "3") . "\n";
echo gmp_legendre("2", "3") . "\n";
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
1
0
]]>
</screen>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<simplelist>
<member><function>gmp_jacobi</function></member>
<member><function>gmp_kronecker</function></member>
</simplelist>
</refsect1>
</refentry>
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