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Theorem 3ex 8803
Description: 3 is a set (common case). (Contributed by David A. Wheeler, 8-Dec-2018.)
Assertion
Ref Expression
3ex  |-  3  e.  _V

Proof of Theorem 3ex
StepHypRef Expression
1 3cn 8802 . 2  |-  3  e.  CC
21elexi 2698 1  |-  3  e.  _V
Colors of variables: wff set class
Syntax hints:    e. wcel 1480   _Vcvv 2686   CCcc 7625   3c3 8779
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 7719  ax-1re 7721  ax-addrcl 7724
This theorem depends on definitions:  df-bi 116  df-nf 1437  df-sb 1736  df-clab 2126  df-cleq 2132  df-clel 2135  df-v 2688  df-in 3077  df-ss 3084  df-2 8786  df-3 8787
This theorem is referenced by:  fztpval  9870
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