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Theorem cbvral 2762
Description: Rule used to change bound variables, using implicit substitution. (Contributed by NM, 31-Jul-2003.)
Hypotheses
Ref Expression
cbvral.1 𝑦𝜑
cbvral.2 𝑥𝜓
cbvral.3 (𝑥 = 𝑦 → (𝜑𝜓))
Assertion
Ref Expression
cbvral (∀𝑥𝐴 𝜑 ↔ ∀𝑦𝐴 𝜓)
Distinct variable groups:   𝑥,𝐴   𝑦,𝐴
Allowed substitution hints:   𝜑(𝑥,𝑦)   𝜓(𝑥,𝑦)

Proof of Theorem cbvral
StepHypRef Expression
1 nfcv 2373 . 2 𝑥𝐴
2 nfcv 2373 . 2 𝑦𝐴
3 cbvral.1 . 2 𝑦𝜑
4 cbvral.2 . 2 𝑥𝜓
5 cbvral.3 . 2 (𝑥 = 𝑦 → (𝜑𝜓))
61, 2, 3, 4, 5cbvralf 2757 1 (∀𝑥𝐴 𝜑 ↔ ∀𝑦𝐴 𝜓)
Colors of variables: wff set class
Syntax hints:  wi 4  wb 105  wnf 1508  wral 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-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-ext 2212
This theorem depends on definitions:  df-bi 117  df-nf 1509  df-sb 1810  df-cleq 2223  df-clel 2226  df-nfc 2362  df-ral 2514
This theorem is referenced by:  cbvralv  2766  cbvralsv  2782  cbviin  4009  frind  4451  ralxpf  4878  eqfnfv2f  5751  ralrnmpt  5792  dff13f  5916  ofrfval2  6257  uchoice  6305  fmpox  6370  cbvixp  6889  mptelixpg  6908  xpf1o  7035  indstr  9832  fsum3  11971  fsum00  12046  mertenslem2  12120  fprodcl2lem  12189  fprodle  12224  ctiunctal  13085  cnmpt11  15036  cnmpt21  15044  bj-bdfindes  16604  bj-findes  16636
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