Definition lfun_unitRingMixin :=
  UnitRingMixin lfun_mulRVr lfun_mulrRV lfun_unitrP lfun_invr_out.Implicit Types (u v : aT) (U V W : {vspace aT}).

(* Specifications: *)
Lemma amull_inj : injective amull.
Lemma amulr_inj : injective amulr.