proposition: Fact qpoly_scaleAr a p q : qpoly_scale a (p * q) = p * (qpoly_scale a q).
proof: Proof. by apply/val_eqP; rewrite /= -scalerAr rmodpZ // monic_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)