fact: Variables (A B : finType) (W : `Ch(A, B)) (n : nat) (P : {fdist 'rV[A]_n}).
imports: mathcomp(all_ssreflect all_algebra zmodp matrix) Reals mathcomp(Rstruct) ssrR Reals_ext ssr_ext ssralg_ext bigop_ext fdist proba channel jfdist_cond