Definition df-6 9053

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 9045	. 2 class 6
2		c5 9044	. . 3 class 5
3		c1 7880	. . 3 class 1
4		caddc 7882	. . 3 class +
5	2, 3, 4	co 5922	. 2 class ( 5 + 1 )
6	1, 5	wceq 1364	1 wff 6 = ( 5 + 1 )

This definition is referenced by:  6re  9071  6pos  9091  6m1e5  9113  5p1e6  9128  3p3e6  9133  4p2e6  9134  5p2e7  9137  6nn  9156  5lt6  9170  6p6e12  9530  7p6e13  9534  8p6e14  9540  8p8e16  9542  9p6e15  9547  9p7e16  9548  6t6e36  9564  7t6e42  9569  8t6e48  9575  9t6e54  9582  lgsdir2lem3  15271  2lgsoddprmlem3d  15351