proposition: Lemma mpoly_scaleAl c p q : c *: (p * q) = (c *: p) * q.
proof: Proof. by rewrite -!mul_mpolyC mulrA. 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