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Theorem velpw 3663
Description: Setvar variable membership in a power class (common case). See elpw 3662. (Contributed by David A. Wheeler, 8-Dec-2018.)
Assertion
Ref Expression
velpw  |-  ( x  e.  ~P A  <->  x  C_  A
)
Distinct variable group:    x, A

Proof of Theorem velpw
StepHypRef Expression
1 vex 2806 . 2  |-  x  e. 
_V
21elpw 3662 1  |-  ( x  e.  ~P A  <->  x  C_  A
)
Colors of variables: wff set class
Syntax hints:    <-> wb 105    e. wcel 2202    C_ wss 3201   ~Pcpw 3656
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-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2213
This theorem depends on definitions:  df-bi 117  df-tru 1401  df-nf 1510  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-v 2805  df-in 3207  df-ss 3214  df-pw 3658
This theorem is referenced by:  ordpwsucss  4671  fabexg  5532  abexssex  6296  qsss  6806  mapval2  6890  pmsspw  6895  uniixp  6933  exmidpw  7143  exmidpweq  7144  pw1fin  7145  pw1dc0el  7146  fival  7229  npsspw  7751  restsspw  13412  subsubrng2  14310  subsubrg2  14341  lssintclm  14480  istopon  14824  isbasis2g  14856  tgval2  14862  unitg  14873  distop  14896  cldss2  14917  ntreq0  14943  discld  14947  neisspw  14959  restdis  14995  cnntr  15036  exmidnotnotr  16727
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