proposition: Theorem _paco6_mult_strong: forall r, paco6 gf (upaco6 gf r) <6== paco6 gf r.
proof: Proof. intros. apply curry_map6. eapply le1_trans; [| eapply _paco_mult_strong]. apply _paco_mon; intros [] H; apply H. Qed.
imports: Program.Basics Paco(paconotation_internal paco_internal pacotac_internal)