OD.
        </li>
        <li>
          <b>ZPROD</b> computes a Schwarz-Christoffel integrand.
        </li>
        <li>
          <b>RPROD</b> computes the absolute value of a Schwarz-Christoffel integrand.
        </li>
        <li>
          <b>NEARZ</b> returns information about the nearest prevertex.
        </li>
        <li>
          <b>ANGLES</b> computes external angles.
        </li>
        <li>
          <b>COUNT0</b> ?
        </li>
        <li>
          <b>COUNT</b> ?
        </li>
      <