(** ** Relation of Qpower to zero *)

(* Specifications: *)
Lemma Qpower_not_0: forall (a : Q) (z : Z),
~ a == 0 -> ~ Qpower a z == 0.
Lemma Qpower_0_le : forall (p : Q) (n : Z), 0 <= p -> 0 <= p^n.
Notation Qpower_pos := Qpower_0_le (only parsing).