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Theorem 1ex 7725
Description: 1 is a set. Common special case. (Contributed by David A. Wheeler, 7-Jul-2016.)
Assertion
Ref Expression
1ex  |-  1  e.  _V

Proof of Theorem 1ex
StepHypRef Expression
1 ax-1cn 7677 . 2  |-  1  e.  CC
21elexi 2670 1  |-  1  e.  _V
Colors of variables: wff set class
Syntax hints:    e. wcel 1463   _Vcvv 2658   CCcc 7582   1c1 7585
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 1406  ax-gen 1408  ax-ie1 1452  ax-ie2 1453  ax-8 1465  ax-4 1470  ax-17 1489  ax-i9 1493  ax-ial 1497  ax-ext 2097  ax-1cn 7677
This theorem depends on definitions:  df-bi 116  df-sb 1719  df-clab 2102  df-cleq 2108  df-clel 2111  df-v 2660
This theorem is referenced by:  nn1suc  8696  nn0ind-raph  9119  fzprval  9802  fztpval  9803  m1expcl2  10255  1exp  10262  facnn  10413  fac0  10414  prhash2ex  10495  ege2le3  11276  1nprm  11691  dvexp  12727  dvef  12739  isomninnlem  13036
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