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Theorem elpwi 3438
Description: Subset relation implied by membership in a power class. (Contributed by NM, 17-Feb-2007.)
Assertion
Ref Expression
elpwi (𝐴 ∈ 𝒫 𝐵𝐴𝐵)

Proof of Theorem elpwi
StepHypRef Expression
1 elpwg 3437 . 2 (𝐴 ∈ 𝒫 𝐵 → (𝐴 ∈ 𝒫 𝐵𝐴𝐵))
21ibi 174 1 (𝐴 ∈ 𝒫 𝐵𝐴𝐵)
Colors of variables: wff set class
Syntax hints:  wi 4  wcel 1438  wss 2999  𝒫 cpw 3429
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-io 665  ax-5 1381  ax-7 1382  ax-gen 1383  ax-ie1 1427  ax-ie2 1428  ax-8 1440  ax-10 1441  ax-11 1442  ax-i12 1443  ax-bndl 1444  ax-4 1445  ax-17 1464  ax-i9 1468  ax-ial 1472  ax-i5r 1473  ax-ext 2070
This theorem depends on definitions:  df-bi 115  df-tru 1292  df-nf 1395  df-sb 1693  df-clab 2075  df-cleq 2081  df-clel 2084  df-nfc 2217  df-v 2621  df-in 3005  df-ss 3012  df-pw 3431
This theorem is referenced by:  elpwid  3440  elelpwi  3441  elpw2g  3992  eldifpw  4299  iunpw  4302  f1opw2  5850
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