proposition: Lemma mpolyOverC c : (c%:MP \in mpolyOver S) = (c \in S).
proof: Proof. rewrite qualifE /= msuppC; case: eqP=> [->|] //=; by rewrite ?rpred0 // andbT mcoeffC eqxx mulr1. 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