s="identifier">f</span> <span class="special">=</span> <span class="special">[&amp;](</span><span class="keyword">double</span> <span class="identifier">x</span><span class="special">)</span>
<span class="special">{</span>
   <span class="keyword">static</span> <span class="keyword">const</span> <span class="keyword">double</span> <span class="identifier">crossover</span> <span class="special">=</span> <span class="special">-</span><span class="identifier">log</span><span class="special">(</span><span class