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Theorem elpwid 3700
Description: An element of a power class is a subclass. Deduction form of elpwi 3698. (Contributed by David Moews, 1-May-2017.)
Hypothesis
Ref Expression
elpwid.1  |-  ( ph  ->  A  e.  ~P B
)
Assertion
Ref Expression
elpwid  |-  ( ph  ->  A  C_  B )

Proof of Theorem elpwid
StepHypRef Expression
1 elpwid.1 . 2  |-  ( ph  ->  A  e.  ~P B
)
2 elpwi 3698 . 2  |-  ( A  e.  ~P B  ->  A  C_  B )
31, 2syl 14 1  |-  ( ph  ->  A  C_  B )
Colors of variables:    wff set class
This proof depends on syntax axioms:    -> wi 4    e. wcel 2209    C_ wss 3220   ~Pcpw 3688
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220
This proof depends on definitions:  df-bi 117  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-v 2823  df-in 3226  df-ss 3233  df-pw 3690
This theorem is used by:  fopwdom  7140  ssenen  7156  fival  7309  fiuni  7317  3nelsucpw1  7599  elnp1st2nd  7849  ixxssxr  10319  elfzoelz  10571  ballotfilem2  13286  ballotfilemfmpn  13292  restid2  13661  cntzrcl  14159  epttop  15316  neiss2  15368  blssm  15647  blin2  15658  cncfrss  15801  cncfrss2  15802  dvidsslem  15919  dvconstss  15924  plybss  15959  uhgrss  16521  upgrss  16545  upgr1een  16570  usgrss  16623  eupth2lemsfi  16924  pw1ndom3lem  17224  pwle2  17233
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