Notation Zle_bool_refl := Z.leb_refl (only parsing).

(* Specifications: *)
Lemma Zle_bool_antisym n m : (n <=? m) = true -> (m <=? n) = true -> n = m.
Lemma Zle_bool_trans n m p : (n <=? m) = true -> (m <=? p) = true -> (n <=? p) = true.