Definition df-6 9206

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

Assertion

Ref	Expression
df-6	⊢ 6 = (5 + 1)

Detailed syntax breakdown of Definition df-6

Step	Hyp	Ref	Expression
1		c6 9198	. 2 class 6
2		c5 9197	. . 3 class 5
3		c1 8033	. . 3 class 1
4		caddc 8035	. . 3 class +
5	2, 3, 4	co 6018	. 2 class (5 + 1)
6	1, 5	wceq 1397	1 wff 6 = (5 + 1)

This definition is referenced by:  6re  9224  6pos  9244  6m1e5  9266  5p1e6  9281  3p3e6  9286  4p2e6  9287  5p2e7  9290  6nn  9309  5lt6  9323  6p6e12  9684  7p6e13  9688  8p6e14  9694  8p8e16  9696  9p6e15  9701  9p7e16  9702  6t6e36  9718  7t6e42  9723  8t6e48  9729  9t6e54  9736  lgsdir2lem3  15778  2lgsoddprmlem3d  15858