proposition: Lemma deriv_map p : p^f^`() = (p^`())^f.
proof: Proof. by apply/polyP => i; rewrite !(coef_map, coef_deriv) //= rmorphMn. Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq choice) mathcomp(fintype bigop finset tuple) mathcomp(div ssralg countalg binomial)