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Definition df-n0 10389
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 10388 . 2
2 cn 10131 . . 3
3 cc0 9104 . . . 4
43csn 3894 . . 3
52, 4cun 3351 . 2
61, 5wceq 1662 1
Colors of variables: wff set class
This definition is referenced by:  elnn0  10390  nnssnn0  10391  nn0ssre  10392  nn0ex  10394  dfn2  10401  nn0addcl  10424  nn0mulcl  10425  nn0ssz  10474
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