Definition df-8 8913

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 8905	. 2 class 8
2		c7 8904	. . 3 class 7
3		c1 7745	. . 3 class 1
4		caddc 7747	. . 3 class +
5	2, 3, 4	co 5836	. 2 class ( 7 + 1 )
6	1, 5	wceq 1342	1 wff 8 = ( 7 + 1 )

This definition is referenced by:  8re  8933  8pos  8951  8m1e7  8973  7p1e8  8987  4p4e8  8993  5p3e8  8995  6p2e8  8997  7p2e9  8999  8nn  9015  7lt8  9038  8p8e16  9398  9p8e17  9405  9p9e18  9406  8t8e64  9433  9t8e72  9440