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Theorem elrab3 2983
Description: Membership in a restricted class abstraction, using implicit substitution. (Contributed by NM, 5-Oct-2006.)
Hypothesis
Ref Expression
elrab.1 (𝑥 = 𝐴 → (𝜑𝜓))
Assertion
Ref Expression
elrab3 (𝐴𝐵 → (𝐴 ∈ {𝑥𝐵𝜑} ↔ 𝜓))
Distinct variable groups:   𝜓,𝑥   𝑥,𝐴   𝑥,𝐵
Allowed substitution hint:   𝜑(𝑥)

Proof of Theorem elrab3
StepHypRef Expression
1 elrab.1 . . 3 (𝑥 = 𝐴 → (𝜑𝜓))
21elrab 2982 . 2 (𝐴 ∈ {𝑥𝐵𝜑} ↔ (𝐴𝐵𝜓))
32baib 931 1 (𝐴𝐵 → (𝐴 ∈ {𝑥𝐵𝜑} ↔ 𝜓))
Colors of variables:    wff set class
This proof depends on syntax axioms:  wi 4  wb 105   = wceq 1402  wcel 2209  {crab 2532
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-rab 2537  df-v 2823
This theorem is used by:  unimax  3969  undifexmid  4330  frind  4497  ordtriexmidlem2  4667  ordtriexmid  4668  ontriexmidim  4669  ordtri2orexmid  4670  onsucelsucexmid  4677  0elsucexmid  4712  ordpwsucexmid  4717  ordtri2or2exmid  4718  ontri2orexmidim  4719  canth  6036  acexmidlema  6076  acexmidlemb  6077  isnumi  7527  genpelvl  7879  genpelvu  7880  cauappcvgprlemladdru  8023  cauappcvgprlem1  8026  caucvgprlem1  8046  sup3exmid  9287  supinfneg  9995  infsupneg  9996  supminfex  9997  ublbneg  10013  negm  10015  infssuzex  10666  hashinfuni  11216  gcddvds  12740  dvdslegcd  12741  bezoutlemsup  12786  uzwodc  12814  lcmval  12841  dvdslcm  12847  isprm2lem  12894  eupth2lem3lem3fi  16711  eupth2lem3lem6fi  16712  eupth2lem3lem4fi  16714
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