proposition: Lemma rclo4_wcompat clo (COM: wcompatible4 clo): wcompatible4 (rclo4 clo).
proof: Proof. econstructor. - apply rclo4_mon. - intros. induction PR. + eapply gf_mon. apply IN. intros. apply gpaco4_base. apply PR. + eapply gf_mon. * eapply COM. eapply COM. apply IN. apply H. * intros. eapply gpaco4_gupaco. apply gf_mon. eapply gupaco4_mon_gen; intros; [apply PR|apply gf_mon|apply PR0| |apply PR0]. apply rclo4_clo_base, PR0. Qed.
imports: Program.Basics Paco(paco4 pacotac)