#[deprecated(since="8.16",note="Use Rinv_inv.")]
Notation Rinv_involutive := Rinv_involutive_depr (only parsing).

(* Specifications: *)
Lemma Rinv_mult_distr_depr : forall r1 r2, r1 <> 0 -> r2 <> 0 -> / (r1 * r2) = / r1 * / r2.