Definition df-8 9186

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 9178	. 2 class 8
2		c7 9177	. . 3 class 7
3		c1 8011	. . 3 class 1
4		caddc 8013	. . 3 class +
5	2, 3, 4	co 6007	. 2 class (7 + 1)
6	1, 5	wceq 1395	1 wff 8 = (7 + 1)

This definition is referenced by:  8re  9206  8pos  9224  8m1e7  9246  7p1e8  9261  4p4e8  9267  5p3e8  9269  6p2e8  9271  7p2e9  9273  8nn  9289  7lt8  9312  8p8e16  9674  9p8e17  9681  9p9e18  9682  8t8e64  9709  9t8e72  9716