proposition: Lemma map_poly0 : 0^f = 0.
proof: Proof. by rewrite map_polyE polyseq0. Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq choice) mathcomp(fintype bigop finset tuple) mathcomp(div ssralg countalg binomial)