Definition df-8 8785

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 8777	. 2 class 8
2		c7 8776	. . 3 class 7
3		c1 7621	. . 3 class 1
4		caddc 7623	. . 3 class +
5	2, 3, 4	co 5774	. 2 class (7 + 1)
6	1, 5	wceq 1331	1 wff 8 = (7 + 1)

This definition is referenced by:  8re  8805  8pos  8823  8m1e7  8845  7p1e8  8859  4p4e8  8865  5p3e8  8867  6p2e8  8869  7p2e9  8871  8nn  8887  7lt8  8910  8p8e16  9267  9p8e17  9274  9p9e18  9275  8t8e64  9302  9t8e72  9309