ode> <strong><code>inv_gamma</code></strong><code>(alpha, beta)</code></p>
<p>Increment target log probability density with <code>inv_gamma_lupdf(y | alpha, beta)</code>.</p>
<small><i>Available since 2.0</i></small>
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<p></p>
</section>
<section id="stan-functions-6" class="level3">
<h3 class="anchored" data-anchor-id="stan-functions-6">Stan functions</h3>
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