proposition: Lemma mevalX v m : meval v 'X_[m] = \prod_(i < n) (v i) ^+ (m i).
proof: Proof. by rewrite [LHS]mmapX. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq path) mathcomp(choice fintype tuple finfun bigop finset binomial) mathcomp(order fingroup perm ssralg zmodp poly ssrint) mathcomp(matrix vector) mathcomp(bigenough) ssrcomplements freeg