Definition df-8 7979

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 7970	. 2 class 8
2		c7 7969	. . 3 class 7
3		c1 6890	. . 3 class 1
4		caddc 6892	. . 3 class +
5	2, 3, 4	co 5512	. 2 class (7 + 1)
6	1, 5	wceq 1243	1 wff 8 = (7 + 1)

This definition is referenced by:  8re  8000  8pos  8019  7p1e8  8049  4p4e8  8056  5p3e8  8058  6p2e8  8061  7p2e9  8064  8nn  8083  7lt8  8107  8p8e16  8428  9p8e17  8435  9p9e18  8436  8t8e64  8461  9t8e72  8468