(* RENAMING of MF.between: *)

Definition betweenf:= MF.between.

Lemma between_expf_L0_2:forall (m:fmap)(x y:dart)(i:nat), inv_hmap (L m zero x y) -> let y_0_1 := cF m y in let x0 := cA m zero x in let z := Iter (cF m) i y_0_1 in betweenf m y_0_1 z x0 -> expf (L m zero x y) y_0_1 z.