proposition: Lemma gpaco7_dist_reverse clo r rg: (paco7 gf (rclo7 clo (rg \7/ r)) \7/ rclo7 clo r) <7= gpaco7 gf clo r rg.
proof: Proof. intros. destruct PR; cycle 1. - eapply gpaco7_rclo. apply H. - econstructor. apply rclo7_base. left. revert x0 x1 x2 x3 x4 x5 x6 H. pcofix CIH; intros. _punfold H0; [|apply gf_mon]. pstep. eapply gf_mon. apply H0. intros. destruct PR. + apply rclo7_base. right. apply CIH, H. + eapply rclo7_mon. apply H. intros. right. apply CIH0. apply PR. Qed.
imports: Program.Basics Paco(paco7 pacotac)