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Theorem 9cn 9078
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 9077 . 2  |-  9  e.  RR
21recni 8038 1  |-  9  e.  CC
Colors of variables: wff set class
Syntax hints:    e. wcel 2167   CCcc 7877   9c9 9048
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 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-11 1520  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-ext 2178  ax-resscn 7971  ax-1re 7973  ax-addrcl 7976
This theorem depends on definitions:  df-bi 117  df-nf 1475  df-sb 1777  df-clab 2183  df-cleq 2189  df-clel 2192  df-in 3163  df-ss 3170  df-2 9049  df-3 9050  df-4 9051  df-5 9052  df-6 9053  df-7 9054  df-8 9055  df-9 9056
This theorem is referenced by:  10m1e9  9552  9t2e18  9578  9t8e72  9584  9t9e81  9585  9t11e99  9586  0.999...  11686  cos2bnd  11925  3dvds  12029  3dvdsdec  12030  3dvds2dec  12031  2exp8  12604
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