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Theorem velpw 3656
Description: Setvar variable membership in a power class (common case). See elpw 3655. (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 2802 . 2  |-  x  e. 
_V
21elpw 3655 1  |-  ( x  e.  ~P A  <->  x  C_  A
)
Colors of variables: wff set class
Syntax hints:    <-> wb 105    e. wcel 2200    C_ wss 3197   ~Pcpw 3649
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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-ext 2211
This theorem depends on definitions:  df-bi 117  df-tru 1398  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-v 2801  df-in 3203  df-ss 3210  df-pw 3651
This theorem is referenced by:  ordpwsucss  4659  fabexg  5515  abexssex  6276  qsss  6749  mapval2  6833  pmsspw  6838  uniixp  6876  exmidpw  7081  exmidpweq  7082  pw1fin  7083  pw1dc0el  7084  fival  7148  npsspw  7669  restsspw  13298  subsubrng2  14195  subsubrg2  14226  lssintclm  14364  istopon  14703  isbasis2g  14735  tgval2  14741  unitg  14752  distop  14775  cldss2  14796  ntreq0  14822  discld  14826  neisspw  14838  restdis  14874  cnntr  14915
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