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

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<a name="Combination-properties"></a>
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<p>
Next: <a href="Combination-functions.html#Combination-functions" accesskey="n" rel="next">Combination functions</a>, Previous: <a href="Accessing-combination-elements.html#Accessing-combination-elements" accesskey="p" rel="previous">Accessing combination elements</a>, Up: <a href="Combinations.html#Combinations" accesskey="u" rel="up">Combinations</a> &nbsp; [<a href="Function-Index.html#Function-Index" title="Index" rel="index">Index</a>]</p>
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<a name="Combination-properties-1"></a>
<h3 class="section">10.4 Combination properties</h3>

<dl>
<dt><a name="index-gsl_005fcombination_005fn"></a>Function: <em>size_t</em> <strong>gsl_combination_n</strong> <em>(const gsl_combination * <var>c</var>)</em></dt>
<dd><p>This function returns the range (<em>n</em>) of the combination <var>c</var>.
</p></dd></dl>

<dl>
<dt><a name="index-gsl_005fcombination_005fk"></a>Function: <em>size_t</em> <strong>gsl_combination_k</strong> <em>(const gsl_combination * <var>c</var>)</em></dt>
<dd><p>This function returns the number of elements (<em>k</em>) in the combination <var>c</var>.
</p></dd></dl>

<dl>
<dt><a name="index-gsl_005fcombination_005fdata"></a>Function: <em>size_t *</em> <strong>gsl_combination_data</strong> <em>(const gsl_combination * <var>c</var>)</em></dt>
<dd><p>This function returns a pointer to the array of elements in the
combination <var>c</var>.
</p></dd></dl>

<dl>
<dt><a name="index-gsl_005fcombination_005fvalid"></a>Function: <em>int</em> <strong>gsl_combination_valid</strong> <em>(gsl_combination * <var>c</var>)</em></dt>
<dd><a name="index-checking-combination-for-validity"></a>
<a name="index-testing-combination-for-validity"></a>
<p>This function checks that the combination <var>c</var> is valid.  The <var>k</var>
elements should lie in the range 0 to <em><var>n</var>-1</em>, with each
value occurring once at most and in increasing order.
</p></dd></dl>




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