proposition: Lemma coefMrz p n i : (p *~ n)`_i = (p`_i *~ n).
proof: Proof. by case: n => n; rewrite ?NegzE (coefMNn, coefMn). Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat choice seq) mathcomp(fintype finfun bigop order ssralg countalg ssrnum) mathcomp(poly)