proposition: Lemma cmM i m1 m2 : (m1 * m2)%M i = (m1 i + m2 i)%N.
proof: Proof. exact/mulcmE. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat) mathcomp(seq path choice finset fintype finfun) mathcomp(tuple bigop ssralg ssrint ssrnum) xfinmap