
      <span class="identifier">pi</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">&gt;(),</span>
      <span class="number">0.0001</span><span class="special">,</span>
      <span class="identifier">cyl_bessel_j_integral_rep</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">&gt;(</span><span class="number">2U</span><span class="special">,</span> <span class="number">1.23</span><span class="special">))</span> <span