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Theorem fveq12d 5561
Description: Equality deduction for function value. (Contributed by FL, 22-Dec-2008.)
Hypotheses
Ref Expression
fveq12d.1  |-  ( ph  ->  F  =  G )
fveq12d.2  |-  ( ph  ->  A  =  B )
Assertion
Ref Expression
fveq12d  |-  ( ph  ->  ( F `  A
)  =  ( G `
 B ) )

Proof of Theorem fveq12d
StepHypRef Expression
1 fveq12d.1 . . 3  |-  ( ph  ->  F  =  G )
21fveq1d 5556 . 2  |-  ( ph  ->  ( F `  A
)  =  ( G `
 A ) )
3 fveq12d.2 . . 3  |-  ( ph  ->  A  =  B )
43fveq2d 5558 . 2  |-  ( ph  ->  ( G `  A
)  =  ( G `
 B ) )
52, 4eqtrd 2226 1  |-  ( ph  ->  ( F `  A
)  =  ( G `
 B ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1364   ` cfv 5254
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 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-ext 2175
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-nf 1472  df-sb 1774  df-clab 2180  df-cleq 2186  df-clel 2189  df-nfc 2325  df-rex 2478  df-v 2762  df-un 3157  df-sn 3624  df-pr 3625  df-op 3627  df-uni 3836  df-br 4030  df-iota 5215  df-fv 5262
This theorem is referenced by:  nffvd  5566  fvsng  5754  tfrlem3ag  6362  tfrlem3a  6363  tfrlemi1  6385  tfr1onlem3ag  6390  omp1eomlem  7153  seq3shft  10982  climshft2  11449  fsum3  11530  ctiunctlemfo  12596  imasival  12889  gsumfzval  12974  gsumval2  12980  mulgfvalg  13191  mulgval  13192  mulgnndir  13221  mulgpropdg  13234  unitinvinv  13620  rlmvalg  13950  rsp0  13989  znval  14124  reldvg  14833  dvfvalap  14835  lgsval  15120  lgsneg  15140
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