(* RENAMING of MF.between: *)

Definition betweenf:= MF.between.

Lemma expf_L0_CN_2:forall (m:fmap)(x y z:dart)(i:nat), inv_hmap (L m zero x y) -> exd m z -> let x0 := cA m zero x in let x_1 := cA_1 m one x in let y_0:= cA_1 m zero y in let y_0_1 := cA_1 m one y_0 in let t:= Iter (cF (L m zero x y)) i z in ~expf m x_1 y -> (expf m z t \/ expf m z y /\ expf m t x0 \/ expf m t y /\ expf m z x0).