proposition: Lemma dom_by_fdist_snd a b : fdist_snd b = 0 -> P (a, b) = 0.
proof: Proof. by rewrite fdist_sndE => /psumr_eq0P -> // ? _; exact: fdist_ge0. Qed.
imports: mathcomp(all_ssreflect ssralg fingroup perm matrix) mathcomp(all_algebra vector reals normedtype) mathcomp(mathcomp_extra boolp) mathcomp(Rstruct) ssrR logb realType_ext ssr_ext ssralg_ext bigop_ext