NCY_STRUCTURE.
        </li>
        <li>
          <a href = "gr_test05.m">gr_test05.m</a>,
          tests GR_DEGREE.
        </li>
        <li>
          <a href = "gr_test06.m">gr_test06.m</a>,
          tests GR_GRF.
        </li>
        <li>
          <a href = "gr_test07.m">gr_test07.m</a>,
          tests GR_INCIDENCE_MATRIX.
        </li>
      </ul>
    </p>

    <p>
      You can go up one level to <a href = "../m_src.html">
      the MATLAB source codes</a>.
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