logistic model (<code>log</code>) of <span class="citation">Gumbel (1960)</span> has distribution function <span class="math display">\[\begin{align*}
\Pr(\boldsymbol{X} \leq \boldsymbol{x})= \exp \left[ -
\left(\sum_{i=1}^{n} {x_i}^{-\alpha}\right)^{\frac{1}{\alpha}}\right]
\end{align*}\]</span> for <span class="math inline">\(\alpha&gt;1\)</span>. The spectral measure density
is <span class="math display">\[\begin{align*}
h_{\boldsymbol{W}}(\boldsymbol{w})=\frac{1}{d}\frac{\Gamma(d-\alpha)}{\Gamma(1-\alph