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Theorem elrabi 2957
Description: Implication for the membership in a restricted class abstraction. (Contributed by Alexander van der Vekens, 31-Dec-2017.)
Assertion
Ref Expression
elrabi (𝐴 ∈ {𝑥𝑉𝜑} → 𝐴𝑉)
Distinct variable groups:   𝑥,𝐴   𝑥,𝑉
Allowed substitution hint:   𝜑(𝑥)

Proof of Theorem elrabi
StepHypRef Expression
1 clelab 2355 . . 3 (𝐴 ∈ {𝑥 ∣ (𝑥𝑉𝜑)} ↔ ∃𝑥(𝑥 = 𝐴 ∧ (𝑥𝑉𝜑)))
2 eleq1 2292 . . . . . 6 (𝑥 = 𝐴 → (𝑥𝑉𝐴𝑉))
32anbi1d 465 . . . . 5 (𝑥 = 𝐴 → ((𝑥𝑉𝜑) ↔ (𝐴𝑉𝜑)))
43simprbda 383 . . . 4 ((𝑥 = 𝐴 ∧ (𝑥𝑉𝜑)) → 𝐴𝑉)
54exlimiv 1644 . . 3 (∃𝑥(𝑥 = 𝐴 ∧ (𝑥𝑉𝜑)) → 𝐴𝑉)
61, 5sylbi 121 . 2 (𝐴 ∈ {𝑥 ∣ (𝑥𝑉𝜑)} → 𝐴𝑉)
7 df-rab 2517 . 2 {𝑥𝑉𝜑} = {𝑥 ∣ (𝑥𝑉𝜑)}
86, 7eleq2s 2324 1 (𝐴 ∈ {𝑥𝑉𝜑} → 𝐴𝑉)
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104   = wceq 1395  wex 1538  wcel 2200  {cab 2215  {crab 2512
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-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-11 1552  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-ext 2211
This theorem depends on definitions:  df-bi 117  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-rab 2517
This theorem is referenced by:  rabsnif  3736  ordtriexmidlem  4615  ordtri2or2exmidlem  4622  onsucelsucexmidlem  4625  ordsoexmid  4658  reg3exmidlemwe  4675  elfvmptrab1  5737  acexmidlemcase  6008  elovmporab  6217  elovmporab1w  6218  ssfirab  7121  exmidonfinlem  7394  cc4f  7478  genpelvl  7722  genpelvu  7723  suplocsrlempr  8017  nnindnn  8103  sup3exmid  9127  nnind  9149  supinfneg  9819  infsupneg  9820  supminfex  9821  ublbneg  9837  zsupcllemstep  10479  infssuzex  10483  infssuzledc  10484  hashinfuni  11029  bezoutlemsup  12570  uzwodc  12598  nninfctlemfo  12601  lcmgcdlem  12639  phisum  12803  oddennn  13003  evenennn  13004  znnen  13009  ennnfonelemg  13014  rrgval  14266  psrbagf  14674  txdis1cn  14992  reopnap  15260  divcnap  15279  limccl  15373  dvlemap  15394  dvaddxxbr  15415  dvmulxxbr  15416  dvcoapbr  15421  dvcjbr  15422  dvrecap  15427  dveflem  15440  sgmval  15697  0sgm  15699  sgmf  15700  sgmnncl  15702  dvdsppwf1o  15703  sgmppw  15706  uhgrss  15916  usgredg2v  16063  clwwlknon  16224
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