Definition df-8 9074

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 9066	. 2 class 8
2		c7 9065	. . 3 class 7
3		c1 7899	. . 3 class 1
4		caddc 7901	. . 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  9094  8pos  9112  8m1e7  9134  7p1e8  9149  4p4e8  9155  5p3e8  9157  6p2e8  9159  7p2e9  9161  8nn  9177  7lt8  9200  8p8e16  9561  9p8e17  9568  9p9e18  9569  8t8e64  9596  9t8e72  9603