ber of out-edges of a vertex.<br>
  (Required by <a href="IncidenceGraph.html">IncidenceGraph</a>.)

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<tt>property_map&lt;adjacency_matrix, PropertyTag&gt;::type</tt><br>
<tt>property_map&lt;adjacency_matrix, PropertyTag&gt;::const_type</tt>
<br><br>
  The map type for vertex or edge properties in the graph. The
  specific property is specified by the <tt>PropertyTag</tt> template
  argument, and must match one of the properties specified in the
  <tt>VertexProperty</tt> or <tt>EdgeProperty</tt> for the