proposition: Fact polyOverNr (zmodS : zmodClosed R) : oppr_closed (polyOver zmodS).
proof: Proof. by move=> p /polyOverP Sp; apply/polyOverP=> i; rewrite coefN rpredN. Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq choice) mathcomp(fintype bigop finset tuple) mathcomp(div ssralg countalg binomial)