ween 0 and 1 to control convergence behavior.
    If \(x_t\) denotes the estimated parameter in iteration \(t\),
    then the regularized estimate \(x_t^{\ast}\) is obtained by
    \(x_t^{\ast}=f x_{t-1} + (1-f) x_t\). Therefore, values of
    <code>oldfac</code> near to one only allow for small changes in estimated
    parameters from in succeeding iterations.</p></dd>

<dt>dampening_factor</dt>
<dd><p>Factor larger than one defining the specified decrease in
   decrements in iterations.</p></dd>

<dt>seed