eturn greatest integer less than or equal to <var>x</var>)</dd>
<dt class="col-md-4"> <samp>isnan(</samp><var>x</var><samp>)</samp></dt><dd class="col-md-8">return 1.0 if <var>x</var> is NAN, 0.0 otherwise</dd>
<dt class="col-md-4"> <samp>j0(</samp><var>x</var><samp>)</samp></dt><dd class="col-md-8"> Bessel functions of <var>x</var> of the first kind of order 0</dd>
<dt class="col-md-4"> <samp>j1(</samp><var>x</var><samp>)</samp></dt><dd class="col-md-8"> Bessel functions of <var>x</var> of the first kind o