Definition df-7 5977

Description: Define the number 7.

Assertion

Ref	Expression
df-7	|- 7 = (6 + 1)

Detailed syntax breakdown of Definition df-7

Step	Hyp	Ref	Expression
1		c7 5968	. 2 class 7
2		c6 5967	. . 3 class 6
3		c1 5247	. . 3 class 1
4		caddc 5249	. . 3 class +
5	2, 3, 4	co 3969	. 2 class (6 + 1)
6	1, 5	wceq 958	1 wff 7 = (6 + 1)

This definition is referenced by:  7re 5987  7pos 5997  4p3e7 6012  5p2e7 6014  6p2e8 6018

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