><span class="special">&lt;</span><span class="identifier">T</span><span class="special">,</span> <span class="identifier">T</span><span class="special">&gt;</span> <span class="identifier">r</span> <span class="special">=</span> <span class="identifier">bracket_and_solve_root</span><span class="special">(</span><span class="identifier">elliptic_root_functor_noderiv</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;(</span><span class="identifier">arc</span><s