proposition: Lemma _paco2_mon_gen (gf gf': rel2 T0 T1 -> rel2 T0 T1) r r' (LEgf: gf <3= gf') (LEr: r <2= r'): paco2 gf r <2== paco2 gf' r'.
proof: Proof. apply curry_map2. red; intros. eapply paco_mon_gen. apply PR. - intros. apply LEgf, PR0. - intros. apply LEr, PR0. Qed.
imports: Program.Basics Paco(paconotation_internal paco_internal pacotac_internal)