er">maxit</span><span class="special">;</span>
   <span class="identifier">T</span> <span class="identifier">result</span> <span class="special">=</span> <span class="identifier">newton_raphson_iterate</span><span class="special">(</span><span class="identifier">elliptic_root_functor_1deriv</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;(</span><span class="identifier">arc</span><span class="special">,</span> <span class="identifier">radius</span><span clas