proposition: Corollary paco7_mult: forall r, paco7 gf (paco7 gf r) <7= paco7 gf r.
proof: Proof. intros; eapply paco7_mult_strong, paco7_mon; [apply PR|..]; intros; left; assumption. Qed.
imports: Program.Basics Paco(paconotation_internal paco_internal pacotac_internal)