proposition: Lemma compat9_compatible' clo (COM: compatible9 gf clo): compatible'9 clo.
proof: Proof. destruct COM. econstructor; [apply compat9_mon0|]. intros. split. - eapply compat9_mon0; intros; [apply PR| apply PR0]. - apply compat9_compat0. eapply compat9_mon0; intros; [apply PR| apply PR0]. Qed.
imports: Program.Basics Paco(paco9 pacotac)