proposition: Lemma mpolyOverNr (addS : zmodClosed R) : oppr_closed (mpolyOver addS).
proof: Proof. by move=> p /mpolyOverP Sp; apply/mpolyOverP=> i; rewrite mcoeffN rpredN. 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