r>
      </td>
      <td style="vertical-align: top;">Ordering of vertices in greedy
matching scheme:<br>
0 - random<br>
1 - natural order (as given by the query functions)<br>
2 - increasing vertex weights<br>
3 - increasing vertex degree<br>
4 - increasing vertex degree, weighted by pins<br>
      </td>
    </tr>
    <tr>
      <td style="vertical-align: top;">&nbsp;&nbsp;&nbsp; <span
 style="font-style: italic;">PHG_EDGE_SCALING</span><br>
      </td>
      <td style="vertical-align: top;">Scale edge wei