ax_terms</em></span> will be set to actual
        number of calls made. This facility is particularly useful when profiling
        a continued fraction for convergence.
      </p>
<h5>
<a name="math_toolkit.internals.cf.h2"></a>
        <span class="phrase"><a name="math_toolkit.internals.cf.implementation"></a></span><a class="link" href="cf.html#math_toolkit.internals.cf.implementation">Implementation</a>
      </h5>
<p>
        Internally these algorithms all use the modified Lentz algorithm: refer to
