d></dl>

<dl class="py method">
<dt class="sig sig-object py" id="finite_topology.functions.Function.is_surjective">
<span class="sig-name descname"><span class="pre">is_surjective</span></span><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#finite_topology.functions.Function.is_surjective" title="Permalink to this definition">¶</a></dt>
<dd><p>Checks if the function is surjective (onto).</p>
<dl class="field-list simple">
<dt class="field-odd">Return type<span 