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Theorem nnsscn 8987
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 8986 . 2  |-  NN  C_  RR
2 ax-resscn 7964 . 2  |-  RR  C_  CC
31, 2sstri 3188 1  |-  NN  C_  CC
Colors of variables: wff set class
Syntax hints:    C_ wss 3153   CCcc 7870   RRcr 7871   NNcn 8982
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-ext 2175  ax-sep 4147  ax-cnex 7963  ax-resscn 7964  ax-1re 7966  ax-addrcl 7969
This theorem depends on definitions:  df-bi 117  df-tru 1367  df-nf 1472  df-sb 1774  df-clab 2180  df-cleq 2186  df-clel 2189  df-nfc 2325  df-ral 2477  df-v 2762  df-in 3159  df-ss 3166  df-int 3871  df-inn 8983
This theorem is referenced by:  nnex  8988  nncn  8990  nncnd  8996  nn0addcl  9275  nn0mulcl  9276  dfz2  9389  nnexpcl  10623  fprodnncl  11753
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