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Definition df-3o 7151
Description: Define the ordinal number 3. (Contributed by Mario Carneiro, 14-Jul-2013.)
Assertion
Ref Expression
df-3o

Detailed syntax breakdown of Definition df-3o
StepHypRef Expression
1 c3o 7144 . 2
2 c2o 7143 . . 3
32csuc 4885 . 2
41, 3wceq 1395 1
Colors of variables: wff setvar class
This definition is referenced by:  3on  7159  3onn  7309  en3  7777  hash3  12471
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