Definition df-cring 18550

Description: Define class of all commutative rings. (Contributed by Mario Carneiro, 7-Jan-2015.)

Assertion

Ref	Expression
df-cring	|- CRing = { f e. Ring | (mulGrp ` f ) e. CMnd }

Detailed syntax breakdown of Definition df-cring

Step	Hyp	Ref	Expression
1		ccrg 18548	. 2 class CRing
2		vf	. . . . . 6 setvar f
3	2	cv 1482	. . . . 5 class f
4		cmgp 18489	. . . . 5 class mulGrp
5	3, 4	cfv 5888	. . . 4 class (mulGrp ` f )
6		ccmn 18193	. . . 4 class CMnd
7	5, 6	wcel 1990	. . 3 wff (mulGrp ` f ) e. CMnd
8		crg 18547	. . 3 class Ring
9	7, 2, 8	crab 2916	. 2 class { f e. Ring | (mulGrp ` f ) e. CMnd }
10	1, 9	wceq 1483	1 wff CRing = { f e. Ring | (mulGrp ` f ) e. CMnd }

This definition is referenced by:  iscrng  18554