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Theorem nnsscn 9318
Description: The positive integers are a subset of the complex numbers. (Contributed by NM, 2-Aug-2004.)
Assertion
Ref Expression
nnsscn  |-  NN  C_  CC

Proof of Theorem nnsscn
StepHypRef Expression
1 nnssre 9317 . 2  |-  NN  C_  RR
2 ax-resscn 8277 . 2  |-  RR  C_  CC
31, 2sstri 3257 1  |-  NN  C_  CC
Colors of variables:    wff set class
This proof depends on syntax axioms:    C_ wss 3220   CCcc 8183   RRcr 8184   NNcn 9313
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220  ax-sep 4251  ax-cnex 8276  ax-resscn 8277  ax-1re 8279  ax-addrcl 8282
This proof depends on definitions:  df-bi 117  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-v 2823  df-in 3226  df-ss 3233  df-int 3971  df-inn 9314
This theorem is used by:  nnex  9319  nncn  9321  nncnd  9327  nn0addcl  9609  nn0mulcl  9610  dfz2  9728  nnexpcl  11010  fprodnncl  12402  mpodvdsmulf1o  16284  fsumdvdsmul  16285
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