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Definition df-3o 8509
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 8502 . 2 class 3o
2 c2o 8501 . . 3 class 2o
32csuc 6385 . 2 class suc 2o
41, 3wceq 1539 1 wff 3o = suc 2o
Colors of variables: wff setvar class
This definition is referenced by:  ord3  8524  3on  8525  o2p2e4  8580  3onn  8683  en3  9317  hash3  14446  finxp3o  37402  df3o2  43331  df3o3  43332  omcl3g  43352  nlim3  43462  tr3dom  43546  har2o  43564  clsk1independent  44064
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