proposition: Lemma size_poly_eq0 p : (size p == 0) = (p == 0).
proof: Proof. by rewrite size_eq0 -polyseq0. Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq choice) mathcomp(fintype bigop finset tuple) mathcomp(div ssralg countalg binomial)