proposition: Theorem _paco4_unfold: forall (MON: _monotone4 gf) r, paco4 gf r <4== gf (upaco4 gf r).
proof: Proof. intros. apply curry_adjoint2_4. eapply _paco_unfold; apply monotone4_map; assumption. Qed.
imports: Program.Basics Paco(paconotation_internal paco_internal pacotac_internal)