> in subgraph <i>g</i>. 
    (Required by <a href="BidirectionalGraph.html">BidirectionalGraph</a>.)

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<pre>
vertices_size_type num_vertices(const subgraph&amp; g)
</pre>
    Returns the number of vertices in the subgraph <i>g</i>.
    (Required by <a href="VertexListGraph.html">VertexListGraph</a>.)

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<pre>
edges_size_type num_edges(const subgraph&amp; g)
</pre>
    Returns the number of edges in the subgraph <i>g</i>.  (Required by
    <a href="EdgeListGraph.html">EdgeListGraph</a>.)

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<pre>
v