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Theorem cbvral 2776
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 2386 . 2 𝑥𝐴
2 nfcv 2386 . 2 𝑦𝐴
3 cbvral.1 . 2 𝑦𝜑
4 cbvral.2 . 2 𝑥𝜓
5 cbvral.3 . 2 (𝑥 = 𝑦 → (𝜑𝜓))
61, 2, 3, 4, 5cbvralf 2771 1 (∀𝑥𝐴 𝜑 ↔ ∀𝑦𝐴 𝜓)
Colors of variables: wff set class
Syntax hints:  wi 4  wb 105  wnf 1509  wral 2522
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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2216
This theorem depends on definitions:  df-bi 117  df-nf 1510  df-sb 1812  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ral 2527
This theorem is referenced by:  cbvralv  2780  cbvralsv  2796  cbviin  4031  frind  4475  ralxpf  4903  eqfnfv2f  5781  ralrnmpt  5821  dff13f  5945  ofrfval2  6285  uchoice  6333  fmpox  6398  cbvixp  6952  mptelixpg  6971  xpf1o  7099  indstr  9931  fsum3  12081  fsum00  12156  mertenslem2  12230  fprodcl2lem  12299  fprodle  12334  ctiunctal  13213  cnmpt11  15197  cnmpt21  15205  bj-bdfindes  16768  bj-findes  16800
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