Definition df-7

Description: Define the number 7. (Contributed by NM, 27-May-1999)

	Ref	Expression
Assertion	df-7	|- 7 = ( 6 + 1 )

Detailed syntax breakdown

Step	Hyp	Ref	Expression
0		c7	|- 7
1		c6	|- 6
2		caddc	|- +
3		c1	|- 1
4	1 3 2	co	|- ( 6 + 1 )
5	0 4	wceq	|- 7 = ( 6 + 1 )