proposition: Lemma compat3_wcompat clo (CMP: compatible3 clo): wcompatible3 clo.
proof: Proof. econstructor. apply CMP. intros. apply CMP in PR. eapply gf_mon. apply PR. intros. apply gpaco3_clo, PR0. Qed.
imports: Program.Basics Paco(paco3 pacotac)