proposition: Lemma in_qpolyD p q : in_qpoly (p + q) = in_qpoly p + in_qpoly q.
proof: Proof. by apply/val_eqP=> /=; rewrite rmodpD ?monic_mk_monic. 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)