e></p>
<p>Increment target log probability density with <code>frechet_lupdf(y | alpha, sigma)</code>.</p>
<small><i>Available since 2.5</i></small>
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<p></p>
</section>
<section id="stan-functions-8" class="level3">
<h3 class="anchored" data-anchor-id="stan-functions-8">Stan functions</h3>
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