proposition: Lemma deg2_poly_min x : p.[- b / 2] <= p.[x].
proof: Proof. by rewrite -a2 deg2_poly_min -/a ?a1 ?ler01. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(ssrAC div fintype path bigop order finset fingroup) mathcomp(ssralg poly)