proposition: Lemma monicP p : reflect (lead_coef p = 1) (p \is monic).
proof: Proof. exact: eqP. Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq choice) mathcomp(fintype bigop finset tuple) mathcomp(div ssralg countalg binomial)