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Theorem cbvabv 2365
Description: Rule used to change bound variables, using implicit substitution. (Contributed by NM, 26-May-1999.)
Hypothesis
Ref Expression
cbvabv.1  |-  ( x  =  y  ->  ( ph 
<->  ps ) )
Assertion
Ref Expression
cbvabv  |-  { x  |  ph }  =  {
y  |  ps }
Distinct variable groups:    ph, y    ps, x
Allowed substitution hints:    ph( x)    ps( y)

Proof of Theorem cbvabv
StepHypRef Expression
1 nfv 1581 . 2  |-  F/ y
ph
2 nfv 1581 . 2  |-  F/ x ps
3 cbvabv.1 . 2  |-  ( x  =  y  ->  ( ph 
<->  ps ) )
41, 2, 3cbvab 2364 1  |-  { x  |  ph }  =  {
y  |  ps }
Colors of variables:    wff set class
This proof depends on syntax axioms:    -> wi 4    <-> wb 105    = wceq 1402   {cab 2224
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-clab 2225  df-cleq 2231
This theorem is used by:  eqabbw  2375  cdeqab1  3043  difjust  3221  unjust  3223  injust  3225  uniiunlem  3338  dfif3  3654  pwjust  3689  snjust  3714  intab  3999  iotajust  5336  cbviotavw  5343  tfrlemi1  6603  tfr1onlemaccex  6619  tfrcllemaccex  6632  frecsuc  6678  isbth  7284  nqprlu  7914  recexpr  8005  caucvgprprlemval  8055  caucvgprprlemnbj  8060  caucvgprprlemaddq  8075  caucvgprprlem1  8076  caucvgprprlem2  8077  axcaucvg  8267  hashf1lem2  11286  mertensabs  12304  4sq  13189  ballotfilemfmpn  13234  isuhgrm  16312  isushgrm  16313  isupgren  16336  isumgren  16346  isuspgren  16398  isusgren  16399  bds  16877
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