proposition: Lemma upaco2_mon_gen (gf gf': rel2 T0 T1 -> rel2 T0 T1) r r' x0 x1 (REL: upaco2 gf r x0 x1) (LEgf: gf <3= gf') (LEr: r <2= r'): upaco2 gf' r' x0 x1.
proof: Proof. destruct REL. - left. eapply paco2_mon_gen; [apply H | apply LEgf | apply LEr]. - right. apply LEr, H. Qed.
imports: Program.Basics Paco(paconotation_internal paco_internal pacotac_internal)