fact: Hypothesis P0 : forall b c d, `Pr[ [% Y, Z, W] = (b, c, d) ] != 0.
imports: mathcomp(all_ssreflect ssralg matrix) Reals mathcomp(Rstruct) ssrR Reals_ext logb ssr_ext ssralg_ext bigop_ext fdist proba jfdist_cond