proposition: Lemma gpaco0_final clo r rg: (r \0/ paco0 gf rg) <0= gpaco0 clo r rg.
proof: Proof. intros. destruct PR. apply gpaco0_base, H. econstructor. apply rclo0_base. left. eapply paco0_mon_gen. apply H. - intros. eapply gf_mon. apply PR. intros. apply rclo0_base. apply PR0. - intros. left. apply PR. Qed.
imports: Program.Basics Paco(paco0 pacotac)