proposition: Lemma msuppD (p1 p2 : {mpoly R[n]}) : [predI (msupp p1) & (msupp p2)] =1 xpred0 -> perm_eq (msupp (p1 + p2)) (msupp p1 ++ msupp p2).
proof: Proof. by apply/domD_perm_eq. 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