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Definition df-n0 10273
Description: Define the set of nonnegative integers. (Contributed by Raph Levien, 10-Dec-2002.)
Assertion
Ref Expression
df-n0

Detailed syntax breakdown of Definition df-n0
StepHypRef Expression
1 cn0 10272 . 2
2 cn 10051 . . 3
3 cc0 9041 . . . 4
43csn 3841 . . 3
52, 4cun 3307 . 2
61, 5wceq 1654 1
Colors of variables: wff set class
This definition is referenced by:  elnn0  10274  nnssnn0  10275  nn0ssre  10276  nn0ex  10278  dfn2  10285  nn0addcl  10306  nn0mulcl  10307  nn0ssz  10353
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