Definition df-6 9173

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 9165	. 2 class 6
2		c5 9164	. . 3 class 5
3		c1 8000	. . 3 class 1
4		caddc 8002	. . 3 class +
5	2, 3, 4	co 6001	. 2 class ( 5 + 1 )
6	1, 5	wceq 1395	1 wff 6 = ( 5 + 1 )

This definition is referenced by:  6re  9191  6pos  9211  6m1e5  9233  5p1e6  9248  3p3e6  9253  4p2e6  9254  5p2e7  9257  6nn  9276  5lt6  9290  6p6e12  9651  7p6e13  9655  8p6e14  9661  8p8e16  9663  9p6e15  9668  9p7e16  9669  6t6e36  9685  7t6e42  9690  8t6e48  9696  9t6e54  9703  lgsdir2lem3  15709  2lgsoddprmlem3d  15789