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Theorem rexralbidv 2556
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 2530 . 2 (𝜑 → (∀𝑦𝐵 𝜓 ↔ ∀𝑦𝐵 𝜒))
32rexbidv 2531 1 (𝜑 → (∃𝑥𝐴𝑦𝐵 𝜓 ↔ ∃𝑥𝐴𝑦𝐵 𝜒))
Colors of variables: wff set class
Syntax hints:  wi 4  wb 105  wral 2508  wrex 2509
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-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-4 1556  ax-17 1572  ax-ial 1580
This theorem depends on definitions:  df-bi 117  df-nf 1507  df-ral 2513  df-rex 2514
This theorem is referenced by:  caucvgpr  7865  caucvgprpr  7895  caucvgsrlemgt1  7978  caucvgsrlemoffres  7983  axcaucvglemres  8082  cvg1nlemres  11491  rexfiuz  11495  resqrexlemgt0  11526  resqrexlemoverl  11527  resqrexlemglsq  11528  resqrexlemsqa  11530  resqrexlemex  11531  cau3lem  11620  caubnd2  11623  climi  11793  2clim  11807  ennnfonelemim  12990  mplelbascoe  14650  lmcvg  14885  lmss  14914  txlm  14947  metcnpi  15183  metcnpi2  15184  elcncf  15241  cncfi  15246  limcimo  15333  cnplimclemr  15337  limccoap  15346
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