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Theorem 1ex 8102
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 8053 . 2  |-  1  e.  CC
21elexi 2789 1  |-  1  e.  _V
Colors of variables: wff set class
Syntax hints:    e. wcel 2178   _Vcvv 2776   CCcc 7958   1c1 7961
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-5 1471  ax-gen 1473  ax-ie1 1517  ax-ie2 1518  ax-8 1528  ax-4 1534  ax-17 1550  ax-i9 1554  ax-ial 1558  ax-ext 2189  ax-1cn 8053
This theorem depends on definitions:  df-bi 117  df-sb 1787  df-clab 2194  df-cleq 2200  df-clel 2203  df-v 2778
This theorem is referenced by:  nn1suc  9090  nn0ind-raph  9525  fzprval  10239  fztpval  10240  m1expcl2  10743  1exp  10750  facnn  10909  fac0  10910  prhash2ex  10991  prodf1f  11969  fprodntrivap  12010  prod1dc  12012  fprodssdc  12016  ege2le3  12097  1nprm  12551  pcmpt  12781  dvexp  15298  dvef  15314  lgsdir2lem3  15622  2o01f  16131  iswomni0  16192
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