(** Yoneda embedding is indeed an embedding. *)

(* Specifications: *)
(** Yoneda is conservative of isomorphisms. *)
Theorem Yoneda_Iso (C : Category) : forall (c c' : Obj),
((Yoneda C) _o c ≃ (Yoneda C) _o c')%isomorphism → (c ≃ c')%isomorphism.