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<title>GNU Scientific Library &ndash; Reference Manual: Permutation properties</title>

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<a name="Permutation-properties"></a>
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<p>
Next: <a href="Permutation-functions.html#Permutation-functions" accesskey="n" rel="next">Permutation functions</a>, Previous: <a href="Accessing-permutation-elements.html#Accessing-permutation-elements" accesskey="p" rel="previous">Accessing permutation elements</a>, Up: <a href="Permutations.html#Permutations" accesskey="u" rel="up">Permutations</a> &nbsp; [<a href="Function-Index.html#Function-Index" title="Index" rel="index">Index</a>]</p>
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<a name="Permutation-properties-1"></a>
<h3 class="section">9.4 Permutation properties</h3>

<dl>
<dt><a name="index-gsl_005fpermutation_005fsize"></a>Function: <em>size_t</em> <strong>gsl_permutation_size</strong> <em>(const gsl_permutation * <var>p</var>)</em></dt>
<dd><p>This function returns the size of the permutation <var>p</var>.
</p></dd></dl>

<dl>
<dt><a name="index-gsl_005fpermutation_005fdata"></a>Function: <em>size_t *</em> <strong>gsl_permutation_data</strong> <em>(const gsl_permutation * <var>p</var>)</em></dt>
<dd><p>This function returns a pointer to the array of elements in the
permutation <var>p</var>.
</p></dd></dl>

<dl>
<dt><a name="index-gsl_005fpermutation_005fvalid"></a>Function: <em>int</em> <strong>gsl_permutation_valid</strong> <em>(const gsl_permutation * <var>p</var>)</em></dt>
<dd><a name="index-checking-permutation-for-validity"></a>
<a name="index-testing-permutation-for-validity"></a>
<p>This function checks that the permutation <var>p</var> is valid.  The <var>n</var>
elements should contain each of the numbers 0 to <em><var>n</var>-1</em> once and only
once.
</p></dd></dl>




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