on W(X) satisfies the equation
      <pre>
        W(x) * exp ( W(x) ) = x
      </pre>
    </p>

    <p>
      The text of many ACM TOMS algorithms is available online
      through ACM:
              <a href = "http://www.acm.org/pubs/calgo/">
                         http://www.acm.org/pubs/calgo</a>
      or NETLIB:
      <a href = "http://www.netlib.org/toms/index.html">
      http://www.netlib.org/toms/index.html</a>.
    </p>

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

    <p>
      <b>TOM