proposition: Corollary paco8_mult: forall r, paco8 gf (paco8 gf r) <8= paco8 gf r.
proof: Proof. intros; eapply paco8_mult_strong, paco8_mon; [apply PR|..]; intros; left; assumption. Qed.
imports: Program.Basics Paco(paconotation_internal paco_internal pacotac_internal)