n> <span class="pre">according</span> <span class="pre">to</span> <span class="pre">the</span>
<span class="pre">distribution</span> <span class="pre">used</span> <span class="pre">to</span> <span class="pre">partition</span> <span class="pre">the</span> <span class="pre">graph.</span> <span class="pre">``n</span></tt> must be a value
between zero and the sum of <tt class="docutils literal"><span class="pre">num_vertices(g)</span></tt> in each process (minus
one). Note that it is not necessarily the case th