Definition df-6 9045

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 9037	. 2 class 6
2		c5 9036	. . 3 class 5
3		c1 7873	. . 3 class 1
4		caddc 7875	. . 3 class +
5	2, 3, 4	co 5918	. 2 class ( 5 + 1 )
6	1, 5	wceq 1364	1 wff 6 = ( 5 + 1 )

This definition is referenced by:  6re  9063  6pos  9083  6m1e5  9105  5p1e6  9119  3p3e6  9124  4p2e6  9125  5p2e7  9128  6nn  9147  5lt6  9161  6p6e12  9521  7p6e13  9525  8p6e14  9531  8p8e16  9533  9p6e15  9538  9p7e16  9539  6t6e36  9555  7t6e42  9560  8t6e48  9566  9t6e54  9573  lgsdir2lem3  15146  2lgsoddprmlem3d  15198