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Theorem 1ex 8327
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 8278 . 2  |-  1  e.  CC
21elexi 2834 1  |-  1  e.  _V
Colors of variables:    wff set class
This proof depends on syntax axioms:    e. wcel 2209   _Vcvv 2821   CCcc 8183   1c1 8186
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-5 1500  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-ext 2220  ax-1cn 8278
This proof depends on definitions:  df-bi 117  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-v 2823
This theorem is used by:  nn1suc  9332  nn0ind-raph  9773  fzprval  10505  fztpval  10506  m1expcl2  11018  1exp  11025  facnn  11186  fac0  11187  prhash2ex  11271  prodf1f  12334  fprodntrivap  12375  prod1dc  12377  fprodssdc  12381  ege2le3  12462  1nprm  12916  pcmpt  13150  ballotfilem2  13285  mvrf1fi  15219  dvexp  15954  dvef  15970  prmorcht  16299  ppiublem2  16309  bposlem5  16332  lgsdir2lem3  16371  2wlklem  16839  konigsberglem4  16954  konigsberglem5  16955  2o01f  17246  iswomni0  17325
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