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 )