r u_local, vertex_descriptor v_local,
         const EdgeProperty&amp; p, subgraph&amp; g)
</pre>
    Adds edge <i>(u,v)</i> to the graph and attaches <tt>p</tt> as the value
    of the edge's internal property storage.  Also see the previous
    <tt>add_edge</tt> member function for more details.

<hr>
<pre>
void remove_edge(vertex_descriptor u_local, vertex_descriptor v_local,
                 subgraph&amp; g)
</pre>
    Removes the edge <i>(u,v)</i> from the subgraph and from all of the
    ancestors of 