Definition df-6 9047

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 9039	. 2 class 6
2		c5 9038	. . 3 class 5
3		c1 7875	. . 3 class 1
4		caddc 7877	. . 3 class +
5	2, 3, 4	co 5919	. 2 class (5 + 1)
6	1, 5	wceq 1364	1 wff 6 = (5 + 1)

This definition is referenced by:  6re  9065  6pos  9085  6m1e5  9107  5p1e6  9122  3p3e6  9127  4p2e6  9128  5p2e7  9131  6nn  9150  5lt6  9164  6p6e12  9524  7p6e13  9528  8p6e14  9534  8p8e16  9536  9p6e15  9541  9p7e16  9542  6t6e36  9558  7t6e42  9563  8t6e48  9569  9t6e54  9576  lgsdir2lem3  15187  2lgsoddprmlem3d  15267