class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">math</span><span class="special">::</span><span class="identifier">ellint_2</span><span class="special">(</span><span class="identifier">k</span><span class="special">);</span>
      <span class="identifier">T</span> <span class="identifier">Kk</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">math</span><span c