proposition: Lemma inj_mwiden : injective mwiden.
proof: Proof. move=> m1 m2 /mpolyP h; apply/mpolyP=> m. by move: (h (mnmwiden m)); rewrite !mwiden_mnmwiden. 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