Definition df-6 9081

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 9073	. 2 class 6
2		c5 9072	. . 3 class 5
3		c1 7908	. . 3 class 1
4		caddc 7910	. . 3 class +
5	2, 3, 4	co 5934	. 2 class (5 + 1)
6	1, 5	wceq 1372	1 wff 6 = (5 + 1)

This definition is referenced by:  6re  9099  6pos  9119  6m1e5  9141  5p1e6  9156  3p3e6  9161  4p2e6  9162  5p2e7  9165  6nn  9184  5lt6  9198  6p6e12  9559  7p6e13  9563  8p6e14  9569  8p8e16  9571  9p6e15  9576  9p7e16  9577  6t6e36  9593  7t6e42  9598  8t6e48  9604  9t6e54  9611  lgsdir2lem3  15425  2lgsoddprmlem3d  15505