(* RENAMING of MF.between: *)

Definition betweenf:= MF.between.

Lemma between_expf_L0_3:forall (m:fmap)(x y:dart)(i:nat), inv_hmap (L m zero x y) -> let x0 := cA m zero x in let x_1 := cA_1 m one x in let z := Iter (cF m) i x_1 in ~ expf m x_1 y -> betweenf m x_1 z x0 -> expf (L m zero x y) x_1 z.