 maximum function value.</span>
            <span class="bp">self</span><span class="o">.</span><span class="n">pos_f</span><span class="p">[</span><span class="s1">&#39;v_inf&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">pos_f</span><span class="p">[</span><span class="n">top_vertex</span><span class="p">][</span><span class="mi">0</span><span class="p">],</span> <span class="n">Lmax</span> <span clas