proposition: Lemma gpaco11_unfold clo r rg: gpaco11 clo r rg <11= rclo11 clo (gf (gupaco11 clo (rg \11/ r)) \11/ r).
proof: Proof. intros. destruct PR. eapply rclo11_mon. apply IN. intros. destruct PR; cycle 1. right; apply H. left. _punfold H; [|apply gpaco11_def_mon]. eapply gf_mon. apply H. intros. econstructor. eapply rclo11_mon. apply PR. intros. destruct PR0; cycle 1. right. apply H0. left. eapply paco11_mon. apply H0. intros. left. apply PR0. Qed.
imports: Program.Basics Paco(paco11 pacotac)