End pow.
Section Bool.

(* Specifications: *)
Theorem eqb_sym :
forall x y, Bool.eqb x y = Bool.eqb y x.
Theorem eqb_false :
forall x y, x = negb y -> Bool.eqb x y = false.
Theorem eqb_true :
forall x y, x = y -> Bool.eqb x y = true.