blob: 372bba79260d29bd2ee4fe95c9e51174bcdd7eea (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
|
(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * Copyright INRIA, CNRS and contributors *)
(* <O___,, * (see version control and CREDITS file for authors & dates) *)
(* \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.
Instance Zcri: (Cring (Rr:=Zr)).
red. exact Z.mul_comm. Defined.
Lemma Z_one_zero: 1%Z <> 0%Z.
Proof. discriminate. Qed.
Instance Zdi : (Integral_domain (Rcr:=Zcri)).
constructor.
exact Zmult_integral. exact Z_one_zero. Defined.
|
