Definition df-3o 7562

Description: Define the ordinal number 3. (Contributed by Mario Carneiro, 14-Jul-2013.)

Assertion

Ref	Expression
df-3o	⊢ 3𝑜 = suc 2𝑜

Detailed syntax breakdown of Definition df-3o

Step	Hyp	Ref	Expression
1		c3o 7555	. 2 class 3𝑜
2		c2o 7554	. . 3 class 2𝑜
3	2	csuc 5725	. 2 class suc 2𝑜
4	1, 3	wceq 1483	1 wff 3𝑜 = suc 2𝑜

This definition is referenced by:  3on  7570  o2p2e4  7621  3onn  7721  en3  8197  hash3  13194  finxp3o  33237  df3o2  38322  df3o3  38323  clsk1independent  38344