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Theorem elab2g 2967
Description: Membership in a class abstraction, using implicit substitution. (Contributed by NM, 13-Sep-1995.)
Hypotheses
Ref Expression
elab2g.1 (𝑥 = 𝐴 → (𝜑𝜓))
elab2g.2 𝐵 = {𝑥𝜑}
Assertion
Ref Expression
elab2g (𝐴𝑉 → (𝐴𝐵𝜓))
Distinct variable groups:   𝜓,𝑥   𝑥,𝐴
Allowed substitution hints:   𝜑(𝑥)   𝐵(𝑥)   𝑉(𝑥)

Proof of Theorem elab2g
StepHypRef Expression
1 elab2g.2 . . 3 𝐵 = {𝑥𝜑}
21eleq2i 2301 . 2 (𝐴𝐵𝐴 ∈ {𝑥𝜑})
3 elab2g.1 . . 3 (𝑥 = 𝐴 → (𝜑𝜓))
43elabg 2966 . 2 (𝐴𝑉 → (𝐴 ∈ {𝑥𝜑} ↔ 𝜓))
52, 4bitrid 192 1 (𝐴𝑉 → (𝐴𝐵𝜓))
Colors of variables: wff set class
Syntax hints:  wi 4  wb 105   = wceq 1398  wcel 2205  {cab 2220
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2216
This theorem depends on definitions:  df-bi 117  df-tru 1401  df-nf 1510  df-sb 1812  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-v 2817
This theorem is referenced by:  elab2  2968  elab4g  2969  eldif  3223  elun  3364  elin  3406  elif  3638  elsng  3709  elprg  3714  eluni  3922  eliun  4000  eliin  4001  elopab  4381  elong  4499  opeliunxp  4810  elrn2g  4950  eldmg  4956  elrnmpt  5011  elrnmpt1  5013  elimag  5110  elrnmpog  6174  eloprabi  6405  tfrlem3ag  6553  tfr1onlem3ag  6581  tfrcllemsucaccv  6598  elqsg  6832  elixp2  6950  isomni  7440  ismkv  7457  iswomni  7469  isacnm  7523  1idprl  7921  1idpru  7922  recexprlemell  7953  recexprlemelu  7954  mertenslemub  12248  mertenslemi1  12249  mertenslem2  12250  4sqexercise1  13124  4sqexercise2  13125  4sqlemsdc  13126  ballotfilemfmpn  13181  ismgm  13623  istopg  14993  isbasisg  15038  2sqlem8  16125  2sqlem9  16126  isuhgrm  16195  isushgrm  16196  isupgren  16219  isumgren  16229  isuspgren  16281  isusgren  16282
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