of a vertex v for a specific direction (included by the use of sorted v_list).</span>

<span class="sd">        Parameters:</span>
<span class="sd">            v (str):</span>
<span class="sd">                The vertex to compute the number of lower edges for.</span>
<span class="sd">            omega (tuple): </span>
<span class="sd">                The direction vector to consider given as an angle in [0, 2pi].</span>

<span class="sd">        Returns:</span>
<span class="sd">            int: The number 