proposition: Fact in_qpoly_multiplicative : multiplicative (in_qpoly h).
proof: Proof. by split; [ apply: in_qpolyM | apply: in_qpoly1]. 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)