#[deprecated(since="8.17")]
Notation Zis_gcd_for_euclid := deprecated_Zis_gcd_for_euclid (only parsing).

(* this lemma is still used below and in Zgcd_alt *)
Lemma Zis_gcd_for_euclid2 :
forall b d q r:Z, Zis_gcd r b d -> Zis_gcd b (b * q + r) d.