Theorem rexralbidv 2523

Description: Formula-building rule for restricted quantifiers (deduction form). (Contributed by NM, 28-Jan-2006.)

Hypothesis

Ref	Expression
2ralbidv.1	⊢ (𝜑 → (𝜓 ↔ 𝜒))

Assertion

Ref	Expression
rexralbidv	⊢ (𝜑 → (∃𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝜓 ↔ ∃𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 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

Step	Hyp	Ref	Expression
1		2ralbidv.1	. . 3 ⊢ (𝜑 → (𝜓 ↔ 𝜒))
2	1	ralbidv 2497	. 2 ⊢ (𝜑 → (∀𝑦 ∈ 𝐵 𝜓 ↔ ∀𝑦 ∈ 𝐵 𝜒))
3	2	rexbidv 2498	1 ⊢ (𝜑 → (∃𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝜓 ↔ ∃𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝜒))

Syntax hints:   → wi 4   ↔ wb 105  ∀wral 2475  ∃wrex 2476

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 1461  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-4 1524  ax-17 1540  ax-ial 1548

This theorem depends on definitions:  df-bi 117  df-nf 1475  df-ral 2480  df-rex 2481

This theorem is referenced by:  caucvgpr  7768  caucvgprpr  7798  caucvgsrlemgt1  7881  caucvgsrlemoffres  7886  axcaucvglemres  7985  cvg1nlemres  11169  rexfiuz  11173  resqrexlemgt0  11204  resqrexlemoverl  11205  resqrexlemglsq  11206  resqrexlemsqa  11208  resqrexlemex  11209  cau3lem  11298  caubnd2  11301  climi  11471  2clim  11485  ennnfonelemim  12668  mplelbascoe  14326  lmcvg  14561  lmss  14590  txlm  14623  metcnpi  14859  metcnpi2  14860  elcncf  14917  cncfi  14922  limcimo  15009  cnplimclemr  15013  limccoap  15022