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Definition df-3o 8507
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 8500 . 2 class 3o
2 c2o 8499 . . 3 class 2o
32csuc 6388 . 2 class suc 2o
41, 3wceq 1537 1 wff 3o = suc 2o
Colors of variables: wff setvar class
This definition is referenced by:  ord3  8522  3on  8523  o2p2e4  8578  3onn  8681  en3  9314  hash3  14442  finxp3o  37383  df3o2  43303  df3o3  43304  omcl3g  43324  nlim3  43434  tr3dom  43518  har2o  43536  clsk1independent  44036
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