Prenex Implicits degree_mxminpoly mxminpoly mx_inv_horner.
Arguments mx_inv_hornerK {F n' A} [B] AnB.
Arguments horner_rVpoly_inj {F n' A} [u1 u2] eq_u12A : rename.
(* Parametricity. *)
Section MapRingMatrix.
Variables (aR rR : ringType) (f : {rmorphism aR -> rR}).
Local Notation "A ^f" := (map_mx (GRing.RMorphism.apply f) A) : ring_scope.
Local Notation fp := (map_poly (GRing.RMorphism.apply f)).
Variables (d n : nat) (A : 'M[aR]_n).

Lemma map_poly_rV p : (poly_rV p)^f = poly_rV (fp p) :> 'rV_d.