Definition df-3 4463

Description: Define the number 3.

Assertion

Ref	Expression
df-3	|- 3 = (2 + 1)

Detailed syntax breakdown of Definition df-3

Step	Hyp	Ref	Expression
1		c3 4455	. 2 class 3
2		c2 4454	. . 3 class 2
3		c1 4029	. . 3 class 1
4		caddc 4031	. . 3 class +
5	2, 3, 4	co 3001	. 2 class (2 + 1)
6	1, 5	wceq 1091	1 wff 3 = (2 + 1)

This definition is referenced by:  3re 4472  3pos 4480  2p2e4 4488  3p3e6 4493  4p3e7 4495  5p3e8 4498  6p3e9 4501  3t3e9 4505  cu2 4711  ruclem1 4885  ruclem3 4887  stm1add3 5688  stadd3 5689

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