proposition: Lemma sgp_right0 x : sgp_right 0 x = 0.
proof: Proof. by rewrite /sgp_right size_poly0. Qed.
imports: mathcomp.ssreflect.ssreflect mathcomp(ssrfun ssrbool eqtype ssrnat seq choice fintype) mathcomp(bigop order ssralg poly polydiv ssrnum zmodp) mathcomp(polyorder path interval ssrint)