      <a href = "polpak_prb_output.txt">polpak_prb_output.txt</a>,
          the output file.
        </li>
      </ul>
    </p>

    <h3 align = "center">
      List of Routines:
    </h3>

    <p>
      <ul>
        <li>
          <b>AGM</b> computes the arithmetic-geometric mean of A and B.
        </li>
        <li>
          <b>AGM_VALUES</b> returns some values of the arithmetic geometric mean.
        </li>
        <li>
          <b>AGUD</b> evaluates the inverse Gudermannian function.
        </li>
