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Definition df-3o 8101
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 8094 . 2 class 3o
2 c2o 8093 . . 3 class 2o
32csuc 6181 . 2 class suc 2o
41, 3wceq 1538 1 wff 3o = suc 2o
Colors of variables: wff setvar class
This definition is referenced by:  3on  8111  o2p2e4  8163  o2p2e4OLD  8164  3onn  8264  en3  8753  hash3  13775  finxp3o  34765  tr3dom  40153  df3o2  40647  df3o3  40648  clsk1independent  40669
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