ancellation error.
        </p>
<p>
          The following continued fraction representation is found in many textbooks
          but is not used in this implementation - it's both slower and less accurate
          than the alternatives - however it is used to generate test data:
        </p>
<p>
          <span class="inlinemediaobject"><img src="../../../../equations/ibeta5.png"></span>
        </p>
<p>
          The following continued fraction is due to <a href="http://portal.acm.org/citation.cfm?doid