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Theorem 9cn 9126
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 9125 . 2  |-  9  e.  RR
21recni 8086 1  |-  9  e.  CC
Colors of variables: wff set class
Syntax hints:    e. wcel 2176   CCcc 7925   9c9 9096
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 1470  ax-7 1471  ax-gen 1472  ax-ie1 1516  ax-ie2 1517  ax-8 1527  ax-11 1529  ax-4 1533  ax-17 1549  ax-i9 1553  ax-ial 1557  ax-i5r 1558  ax-ext 2187  ax-resscn 8019  ax-1re 8021  ax-addrcl 8024
This theorem depends on definitions:  df-bi 117  df-nf 1484  df-sb 1786  df-clab 2192  df-cleq 2198  df-clel 2201  df-in 3172  df-ss 3179  df-2 9097  df-3 9098  df-4 9099  df-5 9100  df-6 9101  df-7 9102  df-8 9103  df-9 9104
This theorem is referenced by:  10m1e9  9601  9t2e18  9627  9t8e72  9633  9t9e81  9634  9t11e99  9635  0.999...  11865  cos2bnd  12104  3dvds  12208  3dvdsdec  12209  3dvds2dec  12210  2exp8  12791
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