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Theorem rexeqdv 2710
Description: Equality deduction for restricted existential quantifier. (Contributed by NM, 14-Jan-2007.)
Hypothesis
Ref Expression
raleq1d.1 (𝜑𝐴 = 𝐵)
Assertion
Ref Expression
rexeqdv (𝜑 → (∃𝑥𝐴 𝜓 ↔ ∃𝑥𝐵 𝜓))
Distinct variable groups:   𝑥,𝐴   𝑥,𝐵
Allowed substitution hints:   𝜑(𝑥)   𝜓(𝑥)

Proof of Theorem rexeqdv
StepHypRef Expression
1 raleq1d.1 . 2 (𝜑𝐴 = 𝐵)
2 rexeq 2704 . 2 (𝐴 = 𝐵 → (∃𝑥𝐴 𝜓 ↔ ∃𝑥𝐵 𝜓))
31, 2syl 14 1 (𝜑 → (∃𝑥𝐴 𝜓 ↔ ∃𝑥𝐵 𝜓))
Colors of variables: wff set class
Syntax hints:  wi 4  wb 105   = wceq 1373  wrex 2486
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 711  ax-5 1471  ax-7 1472  ax-gen 1473  ax-ie1 1517  ax-ie2 1518  ax-8 1528  ax-10 1529  ax-11 1530  ax-i12 1531  ax-bndl 1533  ax-4 1534  ax-17 1550  ax-i9 1554  ax-ial 1558  ax-i5r 1559  ax-ext 2188
This theorem depends on definitions:  df-bi 117  df-tru 1376  df-nf 1485  df-sb 1787  df-cleq 2199  df-clel 2202  df-nfc 2338  df-rex 2491
This theorem is referenced by:  rexeqtrdv  2712  rexeqtrrdv  2714  rexeqbidv  2720  rexeqbidva  2722  fnunirn  5848  cbvexfo  5867  fival  7086  nninfwlpoimlemg  7291  nninfwlpoimlemginf  7292  nninfwlpoim  7295  nninfinfwlpo  7296  genipv  7637  exfzdc  10386  infssuzex  10393  nninfdcex  10397  zproddc  11960  ennnfonelemrnh  12857  grppropd  13419  dvdsrpropdg  13979  znunit  14491  cnpfval  14737  plyval  15274
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