Definition df-6 9056

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 9048	. 2 class 6
2		c5 9047	. . 3 class 5
3		c1 7883	. . 3 class 1
4		caddc 7885	. . 3 class +
5	2, 3, 4	co 5923	. 2 class (5 + 1)
6	1, 5	wceq 1364	1 wff 6 = (5 + 1)

This definition is referenced by:  6re  9074  6pos  9094  6m1e5  9116  5p1e6  9131  3p3e6  9136  4p2e6  9137  5p2e7  9140  6nn  9159  5lt6  9173  6p6e12  9533  7p6e13  9537  8p6e14  9543  8p8e16  9545  9p6e15  9550  9p7e16  9551  6t6e36  9567  7t6e42  9572  8t6e48  9578  9t6e54  9585  lgsdir2lem3  15297  2lgsoddprmlem3d  15377