proposition: Lemma map_poly_rV p : (poly_rV p)^f = poly_rV (fp p) :> 'rV_d.
proof: Proof. by apply/rowP=> j; rewrite !mxE coef_map. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat choice seq) mathcomp(div fintype tuple finfun bigop fingroup perm) mathcomp(ssralg zmodp matrix mxalgebra poly polydiv)