proposition: Theorem _paco4_acc: forall l r (OBG: forall rr (INC: r <4== rr) (CIH: l <4== rr), l <4== paco4 gf rr), l <4== paco4 gf r.
proof: Proof. intros. apply uncurry_adjoint1_4. eapply _paco_acc. intros. apply uncurry_adjoint1_4 in INC. apply uncurry_adjoint1_4 in CIH. apply uncurry_adjoint2_4. eapply le4_trans. eapply (OBG _ INC CIH). apply curry_map4. apply _paco_mon; try apply le1_refl; apply curry_bij1_4. Qed.
imports: Program.Basics Paco(paconotation_internal paco_internal pacotac_internal)