Definition df-6 8984

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 8976	. 2 class 6
2		c5 8975	. . 3 class 5
3		c1 7814	. . 3 class 1
4		caddc 7816	. . 3 class +
5	2, 3, 4	co 5877	. 2 class ( 5 + 1 )
6	1, 5	wceq 1353	1 wff 6 = ( 5 + 1 )

This definition is referenced by:  6re  9002  6pos  9022  6m1e5  9044  5p1e6  9058  3p3e6  9063  4p2e6  9064  5p2e7  9067  6nn  9086  5lt6  9100  6p6e12  9459  7p6e13  9463  8p6e14  9469  8p8e16  9471  9p6e15  9476  9p7e16  9477  6t6e36  9493  7t6e42  9498  8t6e48  9504  9t6e54  9511  lgsdir2lem3  14470  2lgsoddprmlem3d  14497