3 align = "center">
      Examples and Tests:
    </h3>

    <p>
      <ul>
        <li>
          <a href = "tetrahedron_nco_test.m">tetrahedron_nco_test.m</a>,
          runs all the tests.
        </li>
        <li>
          <a href = "tetrahedron_nco_test01.m">tetrahedron_nco_test01.m</a>,
          tests TETRAHEDRON_NCO_RULE_NUM, TETRAHEDRON_NCO_DEGREE, and
          TETRAHEDRON_NCO_ORDER_NUM.
        </li>
        <li>
          <a href = "tetrahedron_nco_test02.m">tetrahedron_nco_test02.m</a>,
     