(* VERSION orb, OK: *)

Theorem orb_L1_eqs: forall(m:fmap)(x y z:dart),
let m1:= L m one x y in
let y0:= cA m zero y in
inv_hmap m1 -> exd m z -> ~expf m x y0
-> ~expf m x z -> ~expf m y0 z ->
eqs (MF.Iter_orb m1 z) (MF.Iter_orb m z).