ref="inc-beta-appendix.html#inc-beta-appendix">appendix</a> for a definition.</p>
<!-- real; lbeta; (real alpha, real beta); -->
<p></p>
<p><code>real</code> <strong><code>lbeta</code></strong><code>(real alpha, real beta)</code><br>
Return the natural logarithm of the beta function applied to alpha and
beta. The beta function, <span class="math inline">\(\text{B}(\alpha,\beta)\)</span>, computes the
normalizing constant for the beta distribution, and is defined for
<span class="math inline">\(\alpha &gt; 0