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Definition df-4o 7152
Description: Define the ordinal number 4. (Contributed by Mario Carneiro, 14-Jul-2013.)
Assertion
Ref Expression
df-4o

Detailed syntax breakdown of Definition df-4o
StepHypRef Expression
1 c4o 7145 . 2
2 c3o 7144 . . 3
32csuc 4885 . 2
41, 3wceq 1395 1
Colors of variables: wff setvar class
This definition is referenced by:  4on  7160  4onn  7310  en4  7778  hash4  12472
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