proposition: Lemma gpaco8_unfold clo r rg: gpaco8 clo r rg <8= rclo8 clo (gf (gupaco8 clo (rg \8/ r)) \8/ r).
proof: Proof. intros. destruct PR. eapply rclo8_mon. apply IN. intros. destruct PR; cycle 1. right; apply H. left. _punfold H; [|apply gpaco8_def_mon]. eapply gf_mon. apply H. intros. econstructor. eapply rclo8_mon. apply PR. intros. destruct PR0; cycle 1. right. apply H0. left. eapply paco8_mon. apply H0. intros. left. apply PR0. Qed.
imports: Program.Basics Paco(paco8 pacotac)