Theorem crngorngo

Description: Obsolete theorem, use crngringd instead. A commutative ring is a ring. (Contributed by Jeff Madsen, 10-Jun-2010) (Proof modification is discouraged.) (New usage is discouraged.)

	Ref	Expression
Assertion	crngorngo	|- ( R e. CRingOps -> R e. RingOps )

Proof

Step	Hyp	Ref	Expression
1		iscrngo	|- ( R e. CRingOps <-> ( R e. RingOps /\ R e. Com2 ) )
2	1	simplbi	|- ( R e. CRingOps -> R e. RingOps )