(* RENAMING of MF.between: *)

Definition betweenf:= MF.between.

Lemma expf_expf_L0_4_bis:forall(m:fmap)(x y z:dart), inv_hmap (L m zero x y) -> let x_1 := cA_1 m one x in ~ expf m x_1 y -> expf m y z -> expf (L m zero x y) y z.