Definition df-8 9302

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 9294	. 2 class 8
2		c7 9293	. . 3 class 7
3		c1 8128	. . 3 class 1
4		caddc 8130	. . 3 class +
5	2, 3, 4	co 6050	. 2 class (7 + 1)
6	1, 5	wceq 1398	1 wff 8 = (7 + 1)

This definition is referenced by:  8re  9322  8pos  9340  8m1e7  9362  7p1e8  9377  4p4e8  9383  5p3e8  9385  6p2e8  9387  7p2e9  9389  8nn  9405  7lt8  9428  8p8e16  9794  9p8e17  9801  9p9e18  9802  8t8e64  9829  9t8e72  9836