Definition df-4 4464

Description: Define the number 4.

Assertion

Ref	Expression
df-4	⊢ 4 = (3 + 1)

Detailed syntax breakdown of Definition df-4

Step	Hyp	Ref	Expression
1		c4 4456	. 2 class 4
2		c3 4455	. . 3 class 3
3		c1 4029	. . 3 class 1
4		caddc 4031	. . 3 class +
5	2, 3, 4	co 3001	. 2 class (3 + 1)
6	1, 5	wceq 1091	1 wff 4 = (3 + 1)

This definition is referenced by:  4re 4473  4pos 4481  2p2e4 4488  3p2e5 4492  4p4e8 4496  5p4e9 4499

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