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Gumbel (LogWeibull, Fisher-Tippetts, Type I Extreme Value) Distribution

docs/tutorial:stats:continuous_gumbel_r

One of a class of extreme value distributions (right-skewed).

M (t) = Γ (1 - t)

h [X] \approx 1.0608407169541684911

Implementation: scipy.stats.gumbel_r