proposition: Lemma qpoly_mulz1 : right_id qpoly1 qpoly_mul.
proof: Proof. by move=> x; apply: val_inj; rewrite /= mulr1 rmodp_small // size_mk_monic. 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)