proposition: Lemma gpaco10_dist_reverse clo r rg: (paco10 gf (rclo10 clo (rg \10/ r)) \10/ rclo10 clo r) <10= gpaco10 gf clo r rg.
proof: Proof. intros. destruct PR; cycle 1. - eapply gpaco10_rclo. apply H. - econstructor. apply rclo10_base. left. revert x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 H. pcofix CIH; intros. _punfold H0; [|apply gf_mon]. pstep. eapply gf_mon. apply H0. intros. destruct PR. + apply rclo10_base. right. apply CIH, H. + eapply rclo10_mon. apply H. intros. right. apply CIH0. apply PR. Qed.
imports: Program.Basics Paco(paco10 pacotac)