proposition: Lemma qpoly_mulzV (p : {poly %/ h}) : coprimep hQ p -> (p * (qpoly_inv p) = 1)%R.
proof: Proof. by move=> hCp; rewrite /= mulrC qpoly_mulVz. 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)