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Theorem 7cn 8804
Description: The number 7 is complex. (Contributed by David A. Wheeler, 8-Dec-2018.)
Assertion
Ref Expression
7cn 7 ∈ ℂ

Proof of Theorem 7cn
StepHypRef Expression
1 7re 8803 . 2 7 ∈ ℝ
21recni 7778 1 7 ∈ ℂ
Colors of variables: wff set class
Syntax hints:  wcel 1480  cc 7618  7c7 8776
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 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-11 1484  ax-4 1487  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2121  ax-resscn 7712  ax-1re 7714  ax-addrcl 7717
This theorem depends on definitions:  df-bi 116  df-nf 1437  df-sb 1736  df-clab 2126  df-cleq 2132  df-clel 2135  df-in 3077  df-ss 3084  df-2 8779  df-3 8780  df-4 8781  df-5 8782  df-6 8783  df-7 8784
This theorem is referenced by:  8m1e7  8845  7p2e9  8871  7p3e10  9256  7t2e14  9290  7t4e28  9292  7t7e49  9295  cos2bnd  11467
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