blob: 88904865363266cc8c138038bec262ff57a22f23 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
|
Require Export Cring.
Require Export Integral_domain.
Require Export Ncring_initial.
Instance Zcri: (Cring (Rr:=Zr)).
red. exact Zmult_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.
|