Definition df-8 9348

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 9340	. 2 class 8
2		c7 9339	. . 3 class 7
3		c1 8170	. . 3 class 1
4		caddc 8172	. . 3 class +
5	2, 3, 4	co 6075	. 2 class (7 + 1)
6	1, 5	wceq 1402	1 wff 8 = (7 + 1)

This definition is referenced by:  8re  9368  8pos  9386  8m1e7  9408  7p1e8  9423  4p4e8  9429  5p3e8  9431  6p2e8  9433  7p2e9  9435  8nn  9451  7lt8  9474  8p8e16  9841  9p8e17  9848  9p9e18  9849  8t8e64  9876  9t8e72  9883