Description: The predicate "is a commutative ring". (Contributed by Jeff Madsen, 8-Jun-2010)
Ref | Expression | ||
---|---|---|---|
Assertion | iscrngo | |- ( R e. CRingOps <-> ( R e. RingOps /\ R e. Com2 ) ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-crngo | |- CRingOps = ( RingOps i^i Com2 ) |
|
2 | 1 | elin2 | |- ( R e. CRingOps <-> ( R e. RingOps /\ R e. Com2 ) ) |