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Theorem elab2g 2951
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 2296 . 2 (𝐴𝐵𝐴 ∈ {𝑥𝜑})
3 elab2g.1 . . 3 (𝑥 = 𝐴 → (𝜑𝜓))
43elabg 2950 . 2 (𝐴𝑉 → (𝐴 ∈ {𝑥𝜑} ↔ 𝜓))
52, 4bitrid 192 1 (𝐴𝑉 → (𝐴𝐵𝜓))
Colors of variables: wff set class
Syntax hints:  wi 4  wb 105   = wceq 1395  wcel 2200  {cab 2215
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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-ext 2211
This theorem depends on definitions:  df-bi 117  df-tru 1398  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-v 2802
This theorem is referenced by:  elab2  2952  elab4g  2953  eldif  3207  elun  3346  elin  3388  elif  3615  elsng  3682  elprg  3687  eluni  3894  eliun  3972  eliin  3973  elopab  4350  elong  4468  opeliunxp  4779  elrn2g  4918  eldmg  4924  elrnmpt  4979  elrnmpt1  4981  elimag  5078  elrnmpog  6129  eloprabi  6356  tfrlem3ag  6470  tfr1onlem3ag  6498  tfrcllemsucaccv  6515  elqsg  6749  elixp2  6866  isomni  7329  ismkv  7346  iswomni  7358  isacnm  7411  1idprl  7803  1idpru  7804  recexprlemell  7835  recexprlemelu  7836  mertenslemub  12088  mertenslemi1  12089  mertenslem2  12090  4sqexercise1  12964  4sqexercise2  12965  4sqlemsdc  12966  ismgm  13433  istopg  14716  isbasisg  14761  2sqlem8  15845  2sqlem9  15846  isuhgrm  15915  isushgrm  15916  isupgren  15939  isumgren  15949  isuspgren  16001  isusgren  16002
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