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Theorem elvvk 4207
 Description: Membership in k (Contributed by SF, 13-Jan-2015.)
Assertion
Ref Expression
elvvk k
Distinct variable group:   ,,

Proof of Theorem elvvk
StepHypRef Expression
1 elxpk 4196 . 2 k
2 vex 2862 . . . . 5
3 vex 2862 . . . . 5
42, 3pm3.2i 441 . . . 4
54biantru 491 . . 3
652exbii 1583 . 2
71, 6bitr4i 243 1 k
 Colors of variables: wff setvar class Syntax hints:   wb 176   wa 358  wex 1541   wceq 1642   wcel 1710  cvv 2859  copk 4057   k cxpk 4174 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1546  ax-5 1557  ax-17 1616  ax-9 1654  ax-8 1675  ax-6 1729  ax-7 1734  ax-11 1746  ax-12 1925  ax-ext 2334  ax-nin 4078  ax-sn 4087 This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-nan 1288  df-tru 1319  df-ex 1542  df-nf 1545  df-sb 1649  df-clab 2340  df-cleq 2346  df-clel 2349  df-nfc 2478  df-ne 2518  df-v 2861  df-nin 3211  df-compl 3212  df-in 3213  df-un 3214  df-dif 3215  df-ss 3259  df-nul 3551  df-sn 3741  df-pr 3742  df-opk 4058  df-xpk 4185 This theorem is referenced by:  opkabssvvk  4208  ssrelk  4211  eqrelk  4212  insklem  4304  ltfinex  4464  setconslem4  4734  setconslem6  4736
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