>, then the probability is 0 and the
log probability is <span class="math inline">\(-\infty\)</span>. Similarly, the distribution requires
strictly positive parameters, with <span class="math inline">\(\alpha_i &gt; 0\)</span> for each <span class="math inline">\(i\)</span>.</p>
</div>
<div id="meaning-of-dirichlet-parameters" class="section level3" number="23.1.2">
<h3><span class="header-section-number">23.1.2</span> Meaning of Dirichlet Parameters</h3>
<p>A symmetric Dirichlet prior is <span class="math 