(**
   Definition and properties of powers.

   WARNING: this file is experimental and likely to change in future releases.
*)

Fixpoint CRpow {R : ConstructiveReals} (r:CRcarrier R) (n:nat) : CRcarrier R :=
  match n with
    | O => 1
    | S n => r * (CRpow r n)
  end.

Lemma GeoHalfTwo : forall {R : ConstructiveReals}, series_cv (fun n => CRpow (CR_of_Q R (1#2)) n) (CR_of_Q R 2).