proposition: Lemma cpn4_compat: compatible4 gf cpn4.
proof: Proof. econstructor; [apply cpn4_mon|intros]. destruct PR; eapply gf_mon with (r:=clo r). - eapply (compat4_compat COM); apply CLO. - intros. econstructor; [apply COM|apply PR]. Qed.
imports: Program.Basics Paco(paco4 pacotac)