proposition: Lemma gpaco7_unfold clo r rg: gpaco7 clo r rg <7= rclo7 clo (gf (gupaco7 clo (rg \7/ r)) \7/ r).
proof: Proof. intros. destruct PR. eapply rclo7_mon. apply IN. intros. destruct PR; cycle 1. right; apply H. left. _punfold H; [|apply gpaco7_def_mon]. eapply gf_mon. apply H. intros. econstructor. eapply rclo7_mon. apply PR. intros. destruct PR0; cycle 1. right. apply H0. left. eapply paco7_mon. apply H0. intros. left. apply PR0. Qed.
imports: Program.Basics Paco(paco7 pacotac)