proposition: Lemma condentropy_indep : PQ = P `x Q -> cond_entropy PQ = `H P.
proof: Proof. by move/mutual_info0P; rewrite mutual_infoE subR_eq0 => <-. Qed.
imports: mathcomp(all_ssreflect all_algebra fingroup perm matrix) Reals mathcomp(Rstruct) ssrR Reals_ext realType_ext ssr_ext ssralg_ext bigop_ext logb ln_facts fdist jfdist_cond proba binary_entropy_function divergence