#[deprecated(since="8.16",note="Use Rinv_div.")]
Notation Rinv_Rdiv := Rinv_Rdiv_depr.

Theorem Dpower : forall y z:R, 0 < y -> D_in (fun x:R => Rpower x z) (fun x:R => z * Rpower x (z - 1)) ( fun x:R => 0 < x) y.