Fact cfun_inv0id : {in [predC cfun_unit], cfun_inv =1 id}.
Canonical cfAut_additive := Additive cfAut_is_rmorphism.
Canonical cfAut_rmorphism := RMorphism cfAut_is_rmorphism.

(* Specifications: *)
Lemma cfAut_cfun1 : cfAut 1 = 1. Proof. exact: rmorph1. Qed.
Lemma cfAut_scalable : scalable_for (u \; *:%R) cfAut.
Definition cfun_vectMixin := VectMixin cfun_vect_iso.