proposition: Lemma compat6_wcompat clo (CMP: compatible6 clo): wcompatible6 clo.
proof: Proof. econstructor. apply CMP. intros. apply CMP in PR. eapply gf_mon. apply PR. intros. apply gpaco6_clo, PR0. Qed.
imports: Program.Basics Paco(paco6 pacotac)