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Theorem nnsscn 8749
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 8748 . 2  |-  NN  C_  RR
2 ax-resscn 7736 . 2  |-  RR  C_  CC
31, 2sstri 3111 1  |-  NN  C_  CC
Colors of variables: wff set class
Syntax hints:    C_ wss 3076   CCcc 7642   RRcr 7643   NNcn 8744
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 699  ax-5 1424  ax-7 1425  ax-gen 1426  ax-ie1 1470  ax-ie2 1471  ax-8 1483  ax-10 1484  ax-11 1485  ax-i12 1486  ax-bndl 1487  ax-4 1488  ax-17 1507  ax-i9 1511  ax-ial 1515  ax-i5r 1516  ax-ext 2122  ax-sep 4054  ax-cnex 7735  ax-resscn 7736  ax-1re 7738  ax-addrcl 7741
This theorem depends on definitions:  df-bi 116  df-tru 1335  df-nf 1438  df-sb 1737  df-clab 2127  df-cleq 2133  df-clel 2136  df-nfc 2271  df-ral 2422  df-v 2691  df-in 3082  df-ss 3089  df-int 3780  df-inn 8745
This theorem is referenced by:  nnex  8750  nncn  8752  nncnd  8758  nn0addcl  9036  nn0mulcl  9037  dfz2  9147  nnexpcl  10337
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