Definition df-8 9267

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 9259	. 2 class 8
2		c7 9258	. . 3 class 7
3		c1 8093	. . 3 class 1
4		caddc 8095	. . 3 class +
5	2, 3, 4	co 6028	. 2 class ( 7 + 1 )
6	1, 5	wceq 1398	1 wff 8 = ( 7 + 1 )

This definition is referenced by:  8re  9287  8pos  9305  8m1e7  9327  7p1e8  9342  4p4e8  9348  5p3e8  9350  6p2e8  9352  7p2e9  9354  8nn  9370  7lt8  9393  8p8e16  9757  9p8e17  9764  9p9e18  9765  8t8e64  9792  9t8e72  9799