Definition df-6 8934

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 8926	. 2 class 6
2		c5 8925	. . 3 class 5
3		c1 7768	. . 3 class 1
4		caddc 7770	. . 3 class +
5	2, 3, 4	co 5851	. 2 class ( 5 + 1 )
6	1, 5	wceq 1348	1 wff 6 = ( 5 + 1 )

This definition is referenced by:  6re  8952  6pos  8972  6m1e5  8994  5p1e6  9008  3p3e6  9013  4p2e6  9014  5p2e7  9017  6nn  9036  5lt6  9050  6p6e12  9409  7p6e13  9413  8p6e14  9419  8p8e16  9421  9p6e15  9426  9p7e16  9427  6t6e36  9443  7t6e42  9448  8t6e48  9454  9t6e54  9461  lgsdir2lem3  13690