proposition: Lemma size_poly_gt0 p : (0 < size p) = (p != 0).
proof: Proof. by rewrite lt0n size_poly_eq0. Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq choice) mathcomp(fintype bigop finset tuple) mathcomp(div ssralg countalg binomial)