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Definition df-n0 10821
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 10820 . 2
2 cn 10561 . . 3
3 cc0 9513 . . . 4
43csn 4029 . . 3
52, 4cun 3473 . 2
61, 5wceq 1395 1
Colors of variables: wff setvar class
This definition is referenced by:  elnn0  10822  nnssnn0  10823  nn0ssre  10824  nn0ex  10826  dfn2  10833  nn0addcl  10856  nn0mulcl  10857  nn0ssz  10910  cply1coe0bi  18342  m2cpminvid2lem  19255  pmatcollpw3fi1  19289
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