t</a></li>
  <li><a href="#stan-functions-7" id="toc-stan-functions-7" class="nav-link" data-scroll-target="#stan-functions-7">Stan functions</a></li>
  </ul></li>
  <li><a href="#frechet-distribution" id="toc-frechet-distribution" class="nav-link" data-scroll-target="#frechet-distribution">Frechet distribution</a>
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  <li><a href="#probability-density-function-8" id="toc-probability-density-function-8" class="nav-link" data-scroll-target="#probability-density-function-8">Probability d