proposition: Lemma gpaco12_final clo r rg: (r \12/ paco12 gf rg) <12= gpaco12 clo r rg.
proof: Proof. intros. destruct PR. apply gpaco12_base, H. econstructor. apply rclo12_base. left. eapply paco12_mon_gen. apply H. - intros. eapply gf_mon. apply PR. intros. apply rclo12_base. apply PR0. - intros. left. apply PR. Qed.
imports: Program.Basics Paco(paco12 pacotac)