proposition: Lemma isnullP (p : polyF) : isnull p ->_e (eval_poly e p == 0).
proof: Proof. by move=> e k; rewrite sizeTP size_poly_eq0. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype choice ssrnat seq) mathcomp(fintype generic_quotient bigop ssralg poly) mathcomp(polydiv matrix mxpoly countalg ring_quotient)