Definition df-8 8585

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 8577	. 2 class 8
2		c7 8576	. . 3 class 7
3		c1 7448	. . 3 class 1
4		caddc 7450	. . 3 class +
5	2, 3, 4	co 5690	. 2 class (7 + 1)
6	1, 5	wceq 1296	1 wff 8 = (7 + 1)

This definition is referenced by:  8re  8605  8pos  8623  7p1e8  8653  4p4e8  8659  5p3e8  8661  6p2e8  8663  7p2e9  8665  8nn  8681  7lt8  8704  8p8e16  9061  9p8e17  9068  9p9e18  9069  8t8e64  9096  9t8e72  9103