proposition: Lemma derivMz n p : (p *~ n)^`() = p^`() *~ n.
proof: Proof. by case: n => n; rewrite ?NegzE -?pmulrn (derivMn, derivMNn). Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat choice seq) mathcomp(fintype finfun bigop order ssralg countalg ssrnum) mathcomp(poly)