Definition df-6 9101

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 9093	. 2 class 6
2		c5 9092	. . 3 class 5
3		c1 7928	. . 3 class 1
4		caddc 7930	. . 3 class +
5	2, 3, 4	co 5946	. 2 class ( 5 + 1 )
6	1, 5	wceq 1373	1 wff 6 = ( 5 + 1 )

This definition is referenced by:  6re  9119  6pos  9139  6m1e5  9161  5p1e6  9176  3p3e6  9181  4p2e6  9182  5p2e7  9185  6nn  9204  5lt6  9218  6p6e12  9579  7p6e13  9583  8p6e14  9589  8p8e16  9591  9p6e15  9596  9p7e16  9597  6t6e36  9613  7t6e42  9618  8t6e48  9624  9t6e54  9631  lgsdir2lem3  15540  2lgsoddprmlem3d  15620