Definition df-6 9119

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 9111	. 2 class 6
2		c5 9110	. . 3 class 5
3		c1 7946	. . 3 class 1
4		caddc 7948	. . 3 class +
5	2, 3, 4	co 5957	. 2 class (5 + 1)
6	1, 5	wceq 1373	1 wff 6 = (5 + 1)

This definition is referenced by:  6re  9137  6pos  9157  6m1e5  9179  5p1e6  9194  3p3e6  9199  4p2e6  9200  5p2e7  9203  6nn  9222  5lt6  9236  6p6e12  9597  7p6e13  9601  8p6e14  9607  8p8e16  9609  9p6e15  9614  9p7e16  9615  6t6e36  9631  7t6e42  9636  8t6e48  9642  9t6e54  9649  lgsdir2lem3  15582  2lgsoddprmlem3d  15662