proposition: Lemma horner_algC c : horner_alg c%:P = c%:A.
proof: Proof. exact: horner_morphC. Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq choice) mathcomp(fintype bigop finset tuple) mathcomp(div ssralg countalg binomial)