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Theorem rexralbidv 2557
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 2531 . 2 (𝜑 → (∀𝑦𝐵 𝜓 ↔ ∀𝑦𝐵 𝜒))
32rexbidv 2532 1 (𝜑 → (∃𝑥𝐴𝑦𝐵 𝜓 ↔ ∃𝑥𝐴𝑦𝐵 𝜒))
Colors of variables: wff set class
Syntax hints:  wi 4  wb 105  wral 2509  wrex 2510
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 2514  df-rex 2515
This theorem is referenced by:  caucvgpr  7904  caucvgprpr  7934  caucvgsrlemgt1  8017  caucvgsrlemoffres  8022  axcaucvglemres  8121  cvg1nlemres  11565  rexfiuz  11569  resqrexlemgt0  11600  resqrexlemoverl  11601  resqrexlemglsq  11602  resqrexlemsqa  11604  resqrexlemex  11605  cau3lem  11694  caubnd2  11697  climi  11867  2clim  11881  ennnfonelemim  13065  mplelbascoe  14732  lmcvg  14967  lmss  14996  txlm  15029  metcnpi  15265  metcnpi2  15266  elcncf  15323  cncfi  15328  limcimo  15415  cnplimclemr  15419  limccoap  15428
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