Definition df-8 9072

Description: Define the number 8. (Contributed by NM, 27-May-1999.)

Assertion

Ref	Expression
df-8	|- 8 = ( 7 + 1 )

Detailed syntax breakdown of Definition df-8

Step	Hyp	Ref	Expression
1		c8 9064	. 2 class 8
2		c7 9063	. . 3 class 7
3		c1 7897	. . 3 class 1
4		caddc 7899	. . 3 class +
5	2, 3, 4	co 5925	. 2 class ( 7 + 1 )
6	1, 5	wceq 1364	1 wff 8 = ( 7 + 1 )

This definition is referenced by:  8re  9092  8pos  9110  8m1e7  9132  7p1e8  9147  4p4e8  9153  5p3e8  9155  6p2e8  9157  7p2e9  9159  8nn  9175  7lt8  9198  8p8e16  9559  9p8e17  9566  9p9e18  9567  8t8e64  9594  9t8e72  9601