proposition: Lemma gpaco6_dist_reverse clo r rg: (paco6 gf (rclo6 clo (rg \6/ r)) \6/ rclo6 clo r) <6= gpaco6 gf clo r rg.
proof: Proof. intros. destruct PR; cycle 1. - eapply gpaco6_rclo. apply H. - econstructor. apply rclo6_base. left. revert x0 x1 x2 x3 x4 x5 H. pcofix CIH; intros. _punfold H0; [|apply gf_mon]. pstep. eapply gf_mon. apply H0. intros. destruct PR. + apply rclo6_base. right. apply CIH, H. + eapply rclo6_mon. apply H. intros. right. apply CIH0. apply PR. Qed.
imports: Program.Basics Paco(paco6 pacotac)