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Theorem 9cn 9371
Description: The number 9 is complex. (Contributed by David A. Wheeler, 8-Dec-2018.)
Assertion
Ref Expression
9cn  |-  9  e.  CC

Proof of Theorem 9cn
StepHypRef Expression
1 9re 9370 . 2  |-  9  e.  RR
21recni 8328 1  |-  9  e.  CC
Colors of variables: wff set class
Syntax hints:    e. wcel 2209   CCcc 8167   9c9 9341
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-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-11 1559  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220  ax-resscn 8261  ax-1re 8263  ax-addrcl 8266
This theorem depends on definitions:  df-bi 117  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-in 3226  df-ss 3233  df-2 9342  df-3 9343  df-4 9344  df-5 9345  df-6 9346  df-7 9347  df-8 9348  df-9 9349
This theorem is referenced by:  10m1e9  9851  9t2e18  9877  9t8e72  9883  9t9e81  9884  9t11e99  9885  0.999...  12266  cos2bnd  12505  3dvds  12609  3dvdsdec  12610  3dvds2dec  12611  2exp8  13192
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