Definition df-8 9351

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 9343	. 2 class 8
2		c7 9342	. . 3 class 7
3		c1 8173	. . 3 class 1
4		caddc 8175	. . 3 class +
5	2, 3, 4	co 6078	. 2 class ( 7 + 1 )
6	1, 5	wceq 1402	1 wff 8 = ( 7 + 1 )

This definition is referenced by:  8re  9371  8pos  9389  8m1e7  9411  7p1e8  9426  4p4e8  9432  5p3e8  9434  6p2e8  9436  7p2e9  9438  8nn  9454  7lt8  9477  8p8e16  9844  9p8e17  9851  9p9e18  9852  8t8e64  9879  9t8e72  9886