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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 (𝜑 → 𝐴 ∈ 𝒫 𝐵)
Assertion
Ref Expression
elpwid (𝜑 → 𝐴 ⊆ 𝐵)

Proof of Theorem elpwid
StepHypRef Expression
1 elpwid.1 . 2 (𝜑 → 𝐴 ∈ 𝒫 𝐵)
2 elpwi 3698 . 2 (𝐴 ∈ 𝒫 𝐵 → 𝐴 ⊆ 𝐵)
31, 2syl 14 1 (𝜑 → 𝐴 ⊆ 𝐵)
Colors of variables:    wff set class
This proof depends on syntax axioms:   → wi 4   ∈ wcel 2209   ⊆ wss 3220  𝒫 cpw 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  7141  ssenen  7157  fival  7310  fiuni  7318  3nelsucpw1  7600  elnp1st2nd  7850  ixxssxr  10320  elfzoelz  10572  ballotfilem2  13287  ballotfilemfmpn  13293  restid2  13662  cntzrcl  14160  epttop  15328  neiss2  15380  blssm  15659  blin2  15670  cncfrss  15813  cncfrss2  15814  dvidsslem  15931  dvconstss  15936  plybss  15971  uhgrss  16533  upgrss  16557  upgr1een  16582  usgrss  16635  eupth2lemsfi  16936  pw1ndom3lem  17236  pwle2  17245
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