proposition: Lemma fdist_is_fdist d : is_fdist d.
proof: Proof. by case: d => f /= /andP[] /forallP ? /eqP. 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