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Theorem elab2g 2886
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 2244 . 2 (𝐴𝐵𝐴 ∈ {𝑥𝜑})
3 elab2g.1 . . 3 (𝑥 = 𝐴 → (𝜑𝜓))
43elabg 2885 . 2 (𝐴𝑉 → (𝐴 ∈ {𝑥𝜑} ↔ 𝜓))
52, 4bitrid 192 1 (𝐴𝑉 → (𝐴𝐵𝜓))
Colors of variables: wff set class
Syntax hints:  wi 4  wb 105   = wceq 1353  wcel 2148  {cab 2163
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 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-ext 2159
This theorem depends on definitions:  df-bi 117  df-tru 1356  df-nf 1461  df-sb 1763  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-v 2741
This theorem is referenced by:  elab2  2887  elab4g  2888  eldif  3140  elun  3278  elin  3320  elsng  3609  elprg  3614  eluni  3814  eliun  3892  eliin  3893  elopab  4260  elong  4375  opeliunxp  4683  elrn2g  4819  eldmg  4824  elrnmpt  4878  elrnmpt1  4880  elimag  4976  elrnmpog  5989  eloprabi  6199  tfrlem3ag  6312  tfr1onlem3ag  6340  tfrcllemsucaccv  6357  elqsg  6587  elixp2  6704  isomni  7136  ismkv  7153  iswomni  7165  1idprl  7591  1idpru  7592  recexprlemell  7623  recexprlemelu  7624  mertenslemub  11544  mertenslemi1  11545  mertenslem2  11546  ismgm  12781  istopg  13584  isbasisg  13629  2sqlem8  14555  2sqlem9  14556
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