proposition: Lemma msuppD_le p q : {subset msupp (p + q) <= msupp p ++ msupp q}.
proof: Proof. by move=> x /domD_subset. 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