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Theorem 9cn 8776
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 8775 . 2  |-  9  e.  RR
21recni 7746 1  |-  9  e.  CC
Colors of variables: wff set class
Syntax hints:    e. wcel 1465   CCcc 7586   9c9 8746
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-5 1408  ax-7 1409  ax-gen 1410  ax-ie1 1454  ax-ie2 1455  ax-8 1467  ax-11 1469  ax-4 1472  ax-17 1491  ax-i9 1495  ax-ial 1499  ax-i5r 1500  ax-ext 2099  ax-resscn 7680  ax-1re 7682  ax-addrcl 7685
This theorem depends on definitions:  df-bi 116  df-nf 1422  df-sb 1721  df-clab 2104  df-cleq 2110  df-clel 2113  df-in 3047  df-ss 3054  df-2 8747  df-3 8748  df-4 8749  df-5 8750  df-6 8751  df-7 8752  df-8 8753  df-9 8754
This theorem is referenced by:  10m1e9  9245  9t2e18  9271  9t8e72  9277  9t9e81  9278  9t11e99  9279  0.999...  11258  cos2bnd  11394  3dvdsdec  11489  3dvds2dec  11490
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