proposition: Lemma hornerZ c p x : (c *: p).[x] = c * p.[x].
proof: Proof. by rewrite -mul_polyC hornerCM. Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq choice) mathcomp(fintype bigop finset tuple) mathcomp(div ssralg countalg binomial)