proposition: Lemma qpolyCD : {morph (qpolyC h) : a b / a + b >-> a + b}%R.
proof: Proof. by move=> a b; apply/val_eqP/eqP=> /=; rewrite -!raddfD. 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)