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Theorem 4cn 8702
Description: The number 4 is a complex number. (Contributed by David A. Wheeler, 7-Jul-2016.)
Assertion
Ref Expression
4cn  |-  4  e.  CC

Proof of Theorem 4cn
StepHypRef Expression
1 4re 8701 . 2  |-  4  e.  RR
21recni 7696 1  |-  4  e.  CC
Colors of variables: wff set class
Syntax hints:    e. wcel 1461   CCcc 7539   4c4 8677
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-5 1404  ax-7 1405  ax-gen 1406  ax-ie1 1450  ax-ie2 1451  ax-8 1463  ax-11 1465  ax-4 1468  ax-17 1487  ax-i9 1491  ax-ial 1495  ax-i5r 1496  ax-ext 2095  ax-resscn 7631  ax-1re 7633  ax-addrcl 7636
This theorem depends on definitions:  df-bi 116  df-nf 1418  df-sb 1717  df-clab 2100  df-cleq 2106  df-clel 2109  df-in 3041  df-ss 3048  df-2 8683  df-3 8684  df-4 8685
This theorem is referenced by:  4p2e6  8761  4p3e7  8762  4p4e8  8763  4t2e8  8776  4d2e2  8778  8th4div3  8837  div4p1lem1div2  8871  5p5e10  9150  4t4e16  9178  6t5e30  9186  fzo0to42pr  9884  fldiv4p1lem1div2  9965  sq4e2t8  10277  sqoddm1div8  10331  4bc3eq4  10406  4bc2eq6  10407  resqrexlemover  10668  resqrexlemcalc1  10672  resqrexlemcalc3  10674  cos2bnd  11312  flodddiv4  11473  6gcd4e2  11523  6lcm4e12  11608  ex-exp  12623  ex-fac  12624  ex-bc  12625
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