proposition: Lemma mcoeff_msupp p m : (m \in msupp p) = (p@_m != 0).
proof: Proof. by rewrite msuppE /mcoeff mem_dom. 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