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(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * INRIA, CNRS and contributors - Copyright 1999-2018 *)
(* <O___,, * (see CREDITS file for the list of authors) *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(* * (see LICENSE file for the text of the license) *)
(************************************************************************)
Require Export Cring.
Require Export Integral_domain.
Require Export Ncring_initial.
Require Export Omega.
Instance Zcri: (Cring (Rr:=Zr)).
red. exact Z.mul_comm. Defined.
Lemma Z_one_zero: 1%Z <> 0%Z.
omega.
Qed.
Instance Zdi : (Integral_domain (Rcr:=Zcri)).
constructor.
exact Zmult_integral. exact Z_one_zero. Defined.
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