(* RENAMING of MF.between: *)

Definition betweenf:= MF.between.

Lemma between_expf_L0:forall (m:fmap)(x y z t:dart), inv_hmap (L m zero x y) -> let x_1 := cA_1 m one x in let y_0_1 := cF m y in let x0 := cA m zero x in (betweenf m x_1 z y /\ betweenf m x_1 t y \/ betweenf m y_0_1 z x0 /\ betweenf m y_0_1 t x0) -> expf (L m zero x y) z t.