proposition: Lemma gpaco3_unfold_bot clo (WCMP: wcompatible3 gf clo): gpaco3 gf clo bot3 bot3 <3= gf (gpaco3 gf clo bot3 bot3).
proof: Proof. intros. apply gpaco3_init in PR; [|apply WCMP]. _punfold PR; [..|apply gf_mon]. eapply gf_mon. apply PR. intros. destruct PR0; [|contradiction]. apply gpaco3_final. apply gf_mon. right. apply H. Qed.
imports: Program.Basics Paco(paco3 pacotac)