proposition: Lemma gpaco6_gen_guard clo r rg: gpaco6 clo r (rg \6/ r) <6= gpaco6 clo r rg.
proof: Proof. intros. destruct PR. econstructor. eapply rclo6_mon. apply IN. intros. destruct PR; [|right; apply H]. left. eapply paco6_mon_gen; intros. apply H. apply PR. destruct PR. apply H0. right. apply H0. Qed.
imports: Program.Basics Paco(paco6 pacotac)