Definition df-6 8920

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 8912	. 2 class 6
2		c5 8911	. . 3 class 5
3		c1 7754	. . 3 class 1
4		caddc 7756	. . 3 class +
5	2, 3, 4	co 5842	. 2 class ( 5 + 1 )
6	1, 5	wceq 1343	1 wff 6 = ( 5 + 1 )

This definition is referenced by:  6re  8938  6pos  8958  6m1e5  8980  5p1e6  8994  3p3e6  8999  4p2e6  9000  5p2e7  9003  6nn  9022  5lt6  9036  6p6e12  9395  7p6e13  9399  8p6e14  9405  8p8e16  9407  9p6e15  9412  9p7e16  9413  6t6e36  9429  7t6e42  9434  8t6e48  9440  9t6e54  9447  lgsdir2lem3  13571