proposition: Lemma mk_monic_neq0 : mk_monic h != 0.
proof: Proof. by rewrite -size_poly_gt0 size_mk_monic_gt0. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice fintype tuple) mathcomp(bigop binomial finset finfun ssralg countalg finalg poly polydiv) mathcomp(perm fingroup matrix mxalgebra mxpoly vector countalg)