n class="emphasis"><em>b</em></span> value
                  is returned and all the <span class="emphasis"><em>a</em></span> values are assumed
                  to 1.
                </p>
              </td>
</tr>
</tbody>
</table></div>
<p>
        In all the continued fraction evaluation functions the <span class="emphasis"><em>tolerance</em></span>
        parameter is the precision desired in the result, evaluation of the fraction
        will continue until the last term evaluated leaves the relative