     List of Routines:
    </h3>

    <p>
      <ul>
         <li>
          <b>DIAEDG</b> chooses a diagonal edge.
        </li>
        <li>
          <b>I4_SIGN</b> evaluates the sign of an I4.
        </li>
        <li>
          <b>I4_SWAP</b> switches two I4's.
        </li>
        <li>
          <b>I4MAT_TRANSPOSE_PRINT</b> prints an I4MAT, transposed.
        </li>
        <li>
          <b>I4MAT_TRANSPOSE_PRINT_SOME</b> prints some of the transpose of an I4MAT.
        </li>
        <li>
         