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Theorem cbvral 2782
Description: Rule used to change bound variables, using implicit substitution. (Contributed by NM, 31-Jul-2003.)
Hypotheses
Ref Expression
cbvral.1  |-  F/ y
ph
cbvral.2  |-  F/ x ps
cbvral.3  |-  ( x  =  y  ->  ( ph 
<->  ps ) )
Assertion
Ref Expression
cbvral  |-  ( A. x  e.  A  ph  <->  A. y  e.  A  ps )
Distinct variable groups:    x, A    y, A
Allowed substitution hints:    ph( x,  y)    ps( x,  y)

Proof of Theorem cbvral
StepHypRef Expression
1 nfcv 2392 . 2  |-  F/_ x A
2 nfcv 2392 . 2  |-  F/_ y A
3 cbvral.1 . 2  |-  F/ y
ph
4 cbvral.2 . 2  |-  F/ x ps
5 cbvral.3 . 2  |-  ( x  =  y  ->  ( ph 
<->  ps ) )
61, 2, 3, 4, 5cbvralf 2777 1  |-  ( A. x  e.  A  ph  <->  A. y  e.  A  ps )
Colors of variables:    wff set class
This proof depends on syntax axioms:    -> wi 4    <-> wb 105   F/wnf 1513   A.wral 2528
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220
This proof depends on definitions:  df-bi 117  df-nf 1514  df-sb 1816  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533
This theorem is used by:  cbvralv  2786  cbvralsv  2802  cbviin  4050  frind  4497  ralxpf  4926  eqfnfv2f  5810  ralrnmpt  5850  dff13f  5976  ofrfval2  6319  uchoice  6371  fmpox  6436  cbvixp  6997  mptelixpg  7016  xpf1o  7144  indstr  9993  fsum3  12154  fsum00  12229  mertenslem2  12303  fprodcl2lem  12372  fprodle  12407  ctiunctal  13332  cnmpt11  15384  cnmpt21  15392  bj-bdfindes  16975  bj-findes  17007
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