proposition: Theorem _paco2_acc: forall l r (OBG: forall rr (INC: r <2== rr) (CIH: l <2== rr), l <2== paco2 gf rr), l <2== paco2 gf r.
proof: Proof. intros. apply uncurry_adjoint1_2. eapply _paco_acc. intros. apply uncurry_adjoint1_2 in INC. apply uncurry_adjoint1_2 in CIH. apply uncurry_adjoint2_2. eapply le2_trans. eapply (OBG _ INC CIH). apply curry_map2. apply _paco_mon; try apply le1_refl; apply curry_bij1_2. Qed.
imports: Program.Basics Paco(paconotation_internal paco_internal pacotac_internal)