Definition df-8 8104

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 8095	. 2 class 8
2		c7 8094	. . 3 class 7
3		c1 6982	. . 3 class 1
4		caddc 6984	. . 3 class +
5	2, 3, 4	co 5532	. 2 class (7 + 1)
6	1, 5	wceq 1284	1 wff 8 = (7 + 1)

This definition is referenced by:  8re  8124  8pos  8142  7p1e8  8171  4p4e8  8177  5p3e8  8179  6p2e8  8181  7p2e9  8183  8nn  8199  7lt8  8222  8p8e16  8562  9p8e17  8569  9p9e18  8570  8t8e64  8597  9t8e72  8604