Definition df-6

Description: Define the number 6. (Contributed by NM, 27-May-1999)

	Ref	Expression
Assertion	df-6	$$⊢6=5+1$$

Detailed syntax breakdown

Step	Hyp	Ref	Expression
0		c6	$$class6$$
1		c5	$$class5$$
2		caddc	$$class+$$
3		c1	$$class1$$
4	1 3 2	co	$$class\left(5+1\right)$$
5	0 4	wceq	$$wff6=5+1$$