proposition: Lemma qpolyC_is_multiplicative : multiplicative (qpolyC h).
proof: Proof. by split=> // x y; rewrite qpolyCM. 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)