raph properties</a></td></tr>
<tr><td></td><td valign="top"><a href="maxima_50.html#IDX2272"><code>is_edge_in_graph</code></a></td><td valign="top"><a href="maxima_50.html#SEC292">50.2.2 Graph properties</a></td></tr>
<tr><td></td><td valign="top"><a href="maxima_50.html#IDX2273"><code>is_graph</code></a></td><td valign="top"><a href="maxima_50.html#SEC292">50.2.2 Graph properties</a></td></tr>
<tr><td></td><td valign="top"><a href="maxima_50.html#IDX2274"><code>is_graph_or_digraph</code></a></td><td valign