proposition: Lemma fdistI_permE i : fdistI_perm i = P (s i).
proof: Proof. by rewrite /fdistI_perm; unlock; rewrite ffunE. 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