="w"> </span></em><span class="sig-prename descclassname"><span class="pre">finite_topology.functions.</span></span><span class="sig-name descname"><span class="pre">Function</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">source</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">target</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">mapping</span></span></em><span class="sig-paren">)</span><a class="he