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Theorem rexralbidv 2558
Description: Formula-building rule for restricted quantifiers (deduction form). (Contributed by NM, 28-Jan-2006.)
Hypothesis
Ref Expression
2ralbidv.1 (𝜑 → (𝜓𝜒))
Assertion
Ref Expression
rexralbidv (𝜑 → (∃𝑥𝐴𝑦𝐵 𝜓 ↔ ∃𝑥𝐴𝑦𝐵 𝜒))
Distinct variable groups:   𝜑,𝑥   𝜑,𝑦
Allowed substitution hints:   𝜓(𝑥,𝑦)   𝜒(𝑥,𝑦)   𝐴(𝑥,𝑦)   𝐵(𝑥,𝑦)

Proof of Theorem rexralbidv
StepHypRef Expression
1 2ralbidv.1 . . 3 (𝜑 → (𝜓𝜒))
21ralbidv 2532 . 2 (𝜑 → (∀𝑦𝐵 𝜓 ↔ ∀𝑦𝐵 𝜒))
32rexbidv 2533 1 (𝜑 → (∃𝑥𝐴𝑦𝐵 𝜓 ↔ ∃𝑥𝐴𝑦𝐵 𝜒))
Colors of variables: wff set class
Syntax hints:  wi 4  wb 105  wral 2510  wrex 2511
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 1495  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-4 1558  ax-17 1574  ax-ial 1582
This theorem depends on definitions:  df-bi 117  df-nf 1509  df-ral 2515  df-rex 2516
This theorem is referenced by:  caucvgpr  7902  caucvgprpr  7932  caucvgsrlemgt1  8015  caucvgsrlemoffres  8020  axcaucvglemres  8119  cvg1nlemres  11563  rexfiuz  11567  resqrexlemgt0  11598  resqrexlemoverl  11599  resqrexlemglsq  11600  resqrexlemsqa  11602  resqrexlemex  11603  cau3lem  11692  caubnd2  11695  climi  11865  2clim  11879  ennnfonelemim  13063  mplelbascoe  14725  lmcvg  14960  lmss  14989  txlm  15022  metcnpi  15258  metcnpi2  15259  elcncf  15316  cncfi  15321  limcimo  15408  cnplimclemr  15412  limccoap  15421
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