    </p>

    <p>
      For information on the form of these files, see the 
      <b>QUADRATURE_RULES</b> directory listed below.
    </p>

    <p>
      The exactness results are written to an output file with the 
      corresponding name:
      <ul>
        <li>
          <i>prefix</i>_<b>exact.txt</b>
        </li>
      </ul>
    </p>

    <h3 align = "center">
      Usage:
    </h3>

    <p>
      <blockquote>
        <b>legendre_exactness</b> ( <i>'prefix'</i>, <i>degree_max</i> )
      </blockquote