ilable since 2.18</i></small>
</section>
</section>
<section id="rayleigh-distribution" class="level2">
<h2 class="anchored" data-anchor-id="rayleigh-distribution">Rayleigh distribution</h2>
<section id="probability-density-function-9" class="level3">
<h3 class="anchored" data-anchor-id="probability-density-function-9">Probability density function</h3>
<p>If <span class="math inline">\(\sigma \in \mathbb{R}^+\)</span>, then for <span class="math inline">\(y \in [0,\infty)\)</span>, <span class="math display