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<title>GNU Scientific Library &ndash; Reference Manual: 9-j Symbols</title>

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<p>
Previous: <a href="6_002dj-Symbols.html#g_t6_002dj-Symbols" accesskey="p" rel="previous">6-j Symbols</a>, Up: <a href="Coupling-Coefficients.html#Coupling-Coefficients" accesskey="u" rel="up">Coupling Coefficients</a> &nbsp; [<a href="Function-Index.html#Function-Index" title="Index" rel="index">Index</a>]</p>
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<hr>
<a name="g_t9_002dj-Symbols-1"></a>
<h4 class="subsection">7.8.3 9-j Symbols</h4>

<dl>
<dt><a name="index-gsl_005fsf_005fcoupling_005f9j"></a>Function: <em>double</em> <strong>gsl_sf_coupling_9j</strong> <em>(int <var>two_ja</var>, int <var>two_jb</var>, int <var>two_jc</var>, int <var>two_jd</var>, int <var>two_je</var>, int <var>two_jf</var>, int <var>two_jg</var>, int <var>two_jh</var>, int <var>two_ji</var>)</em></dt>
<dt><a name="index-gsl_005fsf_005fcoupling_005f9j_005fe"></a>Function: <em>int</em> <strong>gsl_sf_coupling_9j_e</strong> <em>(int <var>two_ja</var>, int <var>two_jb</var>, int <var>two_jc</var>, int <var>two_jd</var>, int <var>two_je</var>, int <var>two_jf</var>, int <var>two_jg</var>, int <var>two_jh</var>, int <var>two_ji</var>, gsl_sf_result * <var>result</var>) </em></dt>
<dd><p>These routines compute the Wigner 9-j coefficient, 
</p>
<div class="example">
<pre class="example">{ja jb jc
 jd je jf
 jg jh ji}
</pre></div>

<p>where the arguments are given in half-integer units, <em>ja</em> =
<var>two_ja</var>/2, <em>ma</em> = <var>two_ma</var>/2, etc.
</p></dd></dl>





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