Definition df-6 8485

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 8477	. 2 class 6
2		c5 8476	. . 3 class 5
3		c1 7351	. . 3 class 1
4		caddc 7353	. . 3 class +
5	2, 3, 4	co 5652	. 2 class (5 + 1)
6	1, 5	wceq 1289	1 wff 6 = (5 + 1)

This definition is referenced by:  6re  8503  6pos  8523  5p1e6  8553  3p3e6  8558  4p2e6  8559  5p2e7  8562  6nn  8581  5lt6  8595  6p6e12  8950  7p6e13  8954  8p6e14  8960  8p8e16  8962  9p6e15  8967  9p7e16  8968  6t6e36  8984  7t6e42  8989  8t6e48  8995  9t6e54  9002