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Definition df-3o 7723
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
StepHypRef Expression
1 c3o 7716 . 2 class 3𝑜
2 c2o 7715 . . 3 class 2𝑜
32csuc 5878 . 2 class suc 2𝑜
41, 3wceq 1624 1 wff 3𝑜 = suc 2𝑜
Colors of variables: wff setvar class
This definition is referenced by:  3on  7731  o2p2e4  7782  3onn  7882  en3  8354  hash3  13378  finxp3o  33540  df3o2  38816  df3o3  38817  clsk1independent  38838
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