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(* 02110-1301 USA                                                     *)
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(*          Projet Coq - Calculus of Inductive Constructions V5.10           *)
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(*                                                                           *)
(*          Category Theory : Functor exercises                              *)
(*                                                                           *)
(*          Amokrane Saibi May 1994                                          *)
(*                                                                           *)
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Require Export Functor.
Require Export CatProperty.
Set Implicit Arguments.
Unset Strict Implicit.
(* exersise *)
Section functor_prop.
Variable C D : Category.
(* exercises *)

Lemma Functor_preserves_iso :
forall (F : Functor C D) (a b : C), Iso a b -> Iso (F a) (F b).