proposition: Lemma monotone2_compose (gf gf': rel2 T0 T1 -> rel2 T0 T1) (MON1: monotone2 gf) (MON2: monotone2 gf'): monotone2 (compose gf gf').
proof: Proof. red; intros. eapply MON1. apply IN. intros. eapply MON2. apply PR. apply LE. Qed.
imports: Program.Basics Paco(paconotation_internal paco_internal pacotac_internal)