Definition df-6 9300

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 9292	. 2 class 6
2		c5 9291	. . 3 class 5
3		c1 8128	. . 3 class 1
4		caddc 8130	. . 3 class +
5	2, 3, 4	co 6050	. 2 class (5 + 1)
6	1, 5	wceq 1398	1 wff 6 = (5 + 1)

This definition is referenced by:  6re  9318  6pos  9338  6m1e5  9360  5p1e6  9375  3p3e6  9380  4p2e6  9381  5p2e7  9384  6nn  9403  5lt6  9417  6p6e12  9782  7p6e13  9786  8p6e14  9792  8p8e16  9794  9p6e15  9799  9p7e16  9800  6t6e36  9816  7t6e42  9821  8t6e48  9827  9t6e54  9834  lgsdir2lem3  15903  2lgsoddprmlem3d  15983