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Theorem rexralbidv 2520
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 2494 . 2 (𝜑 → (∀𝑦𝐵 𝜓 ↔ ∀𝑦𝐵 𝜒))
32rexbidv 2495 1 (𝜑 → (∃𝑥𝐴𝑦𝐵 𝜓 ↔ ∃𝑥𝐴𝑦𝐵 𝜒))
Colors of variables: wff set class
Syntax hints:  wi 4  wb 105  wral 2472  wrex 2473
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 1458  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-4 1521  ax-17 1537  ax-ial 1545
This theorem depends on definitions:  df-bi 117  df-nf 1472  df-ral 2477  df-rex 2478
This theorem is referenced by:  caucvgpr  7742  caucvgprpr  7772  caucvgsrlemgt1  7855  caucvgsrlemoffres  7860  axcaucvglemres  7959  cvg1nlemres  11129  rexfiuz  11133  resqrexlemgt0  11164  resqrexlemoverl  11165  resqrexlemglsq  11166  resqrexlemsqa  11168  resqrexlemex  11169  cau3lem  11258  caubnd2  11261  climi  11430  2clim  11444  ennnfonelemim  12581  lmcvg  14385  lmss  14414  txlm  14447  metcnpi  14683  metcnpi2  14684  elcncf  14728  cncfi  14733  limcimo  14819  cnplimclemr  14823  limccoap  14832
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