Definition df-3o 7449

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 7442	. 2 class 3𝑜
2		c2o 7441	. . 3 class 2𝑜
3	2	csuc 5642	. 2 class suc 2𝑜
4	1, 3	wceq 1475	1 wff 3𝑜 = suc 2𝑜

This definition is referenced by:  3on  7457  o2p2e4  7508  3onn  7608  en3  8082  hash3  13055  finxp3o  32413  df3o2  37342  df3o3  37343  clsk1independent  37364