proposition: Lemma Idl_CatFunct : Idl_law'' Comp_CatFunct Id_CatFunct.
proof: Proof. red in |- *; simple induction f. unfold Comp_CatFunct in |- *; unfold Id_CatFunct in |- *; simpl in |- *. unfold Equal_NT in |- *; simpl in |- *. unfold Comp_tau in |- *; simpl in |- *. unfold Id_CatFunct_tau in |- *; intros. apply Idl. Qed.
imports: Ntransformation Category_dup2