Definition df-8 9100

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 9092	. 2 class 8
2		c7 9091	. . 3 class 7
3		c1 7925	. . 3 class 1
4		caddc 7927	. . 3 class +
5	2, 3, 4	co 5943	. 2 class (7 + 1)
6	1, 5	wceq 1372	1 wff 8 = (7 + 1)

This definition is referenced by:  8re  9120  8pos  9138  8m1e7  9160  7p1e8  9175  4p4e8  9181  5p3e8  9183  6p2e8  9185  7p2e9  9187  8nn  9203  7lt8  9226  8p8e16  9588  9p8e17  9595  9p9e18  9596  8t8e64  9623  9t8e72  9630