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