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<a name="bes"></a>
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<a name="bes-1"></a>
<h2 class="section">D.1 <code>bes</code></h2>

<p>An interface to the Bessel functions as defined in the GNU Scientific
Library (gsl) is available to virtual code applications by invoking a
function of the form
</p>
<table><tr><td>&nbsp;</td><td><pre class="example">library('bes',f)
</pre></td></tr></table>

<p>where f is a character string identifying the Bessel function family.
All functions in this library return a floating point number encoded
as in <a href="math.html#math"><code>math</code></a>.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top"><a href="Bessel-function-calling-conventions.html#Bessel-function-calling-conventions">D.1.1 Bessel function calling conventions</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="Bessel-function-errors.html#Bessel-function-errors">D.1.2 Bessel function errors</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
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