proposition: Fact qpoly_scaleDr a : {morph qpoly_scale a : p q / (p + q)%R}.
proof: Proof. by move=> p q; apply/val_eqP; rewrite /= scalerDr. 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)