Description: Define the class of commutative rings. (Contributed by Jeff Madsen, 8-Jun-2010)
Ref | Expression | ||
---|---|---|---|
Assertion | df-crngo | |
Step | Hyp | Ref | Expression |
---|---|---|---|
0 | ccring | |
|
1 | crngo | |
|
2 | ccm2 | |
|
3 | 1 2 | cin | |
4 | 0 3 | wceq | |