proposition: Lemma fdist_post_probE x : fdist_post_prob x = P x * W ``(y | x) / den.
proof: Proof. by rewrite /fdist_post_prob; unlock; rewrite ffunE. Qed.
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