proposition: Lemma compat12_wcompat clo (CMP: compatible12 clo): wcompatible12 clo.
proof: Proof. econstructor. apply CMP. intros. apply CMP in PR. eapply gf_mon. apply PR. intros. apply gpaco12_clo, PR0. Qed.
imports: Program.Basics Paco(paco12 pacotac)