proposition: Lemma gpaco0_dist_reverse clo r rg: (paco0 gf (rclo0 clo (rg \0/ r)) \0/ rclo0 clo r) <0= gpaco0 gf clo r rg.
proof: Proof. intros. destruct PR; cycle 1. - eapply gpaco0_rclo. apply H. - econstructor. apply rclo0_base. left. revert H. pcofix CIH; intros. _punfold H0; [|apply gf_mon]. pstep. eapply gf_mon. apply H0. intros. destruct PR. + apply rclo0_base. right. apply CIH, H. + eapply rclo0_mon. apply H. intros. right. apply CIH0. apply PR. Qed.
imports: Program.Basics Paco(paco0 pacotac)