Definition df-3

Description: Define the number 3. (Contributed by NM, 27-May-1999)

	Ref	Expression
Assertion	df-3	|- 3 = ( 2 + 1 )

Detailed syntax breakdown

Step	Hyp	Ref	Expression
0		c3	|- 3
1		c2	|- 2
2		caddc	|- +
3		c1	|- 1
4	1 3 2	co	|- ( 2 + 1 )
5	0 4	wceq	|- 3 = ( 2 + 1 )