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Theorem elpw2 3939
Description: Membership in a power class. Theorem 86 of [Suppes] p. 47. (Contributed by NM, 11-Oct-2007.)
Hypothesis
Ref Expression
elpw2.1  |-  B  e. 
_V
Assertion
Ref Expression
elpw2  |-  ( A  e.  ~P B  <->  A  C_  B
)

Proof of Theorem elpw2
StepHypRef Expression
1 elpw2.1 . 2  |-  B  e. 
_V
2 elpw2g 3938 . 2  |-  ( B  e.  _V  ->  ( A  e.  ~P B  <->  A 
C_  B ) )
31, 2ax-mp 7 1  |-  ( A  e.  ~P B  <->  A  C_  B
)
Colors of variables: wff set class
Syntax hints:    <-> wb 102    e. wcel 1409   _Vcvv 2574    C_ wss 2945   ~Pcpw 3387
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 103  ax-ia2 104  ax-ia3 105  ax-io 640  ax-5 1352  ax-7 1353  ax-gen 1354  ax-ie1 1398  ax-ie2 1399  ax-8 1411  ax-10 1412  ax-11 1413  ax-i12 1414  ax-bndl 1415  ax-4 1416  ax-17 1435  ax-i9 1439  ax-ial 1443  ax-i5r 1444  ax-ext 2038  ax-sep 3903
This theorem depends on definitions:  df-bi 114  df-tru 1262  df-nf 1366  df-sb 1662  df-clab 2043  df-cleq 2049  df-clel 2052  df-nfc 2183  df-v 2576  df-in 2952  df-ss 2959  df-pw 3389
This theorem is referenced by:  axpweq  3952  genpelxp  6667  ltexprlempr  6764  recexprlempr  6788  cauappcvgprlemcl  6809  cauappcvgprlemladd  6814  caucvgprlemcl  6832  caucvgprprlemcl  6860  uzf  8572  ixxf  8868  fzf  8980
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