proposition: Lemma coefMNn p n i : (p *- n)`_i = p`_i *- n.
proof: Proof. by rewrite coefN coefMn. Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq choice) mathcomp(fintype bigop finset tuple) mathcomp(div ssralg countalg binomial)