Theorem fveq12d 5501

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

Step	Hyp	Ref	Expression
1		fveq12d.1	. . 3 |- ( ph -> F = G )
2	1	fveq1d 5496	. 2 |- ( ph -> ( F ` A ) = ( G ` A ) )
3		fveq12d.2	. . 3 |- ( ph -> A = B )
4	3	fveq2d 5498	. 2 |- ( ph -> ( G ` A ) = ( G ` B ) )
5	2, 4	eqtrd 2203	1 |- ( ph -> ( F ` A ) = ( G ` B ) )

Syntax hints:   -> wi 4   = wceq 1348   ` cfv 5196

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-ext 2152

This theorem depends on definitions:  df-bi 116  df-3an 975  df-tru 1351  df-nf 1454  df-sb 1756  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-rex 2454  df-v 2732  df-un 3125  df-sn 3587  df-pr 3588  df-op 3590  df-uni 3795  df-br 3988  df-iota 5158  df-fv 5204

This theorem is referenced by:  nffvd  5506  fvsng  5690  tfrlem3ag  6286  tfrlem3a  6287  tfrlemi1  6309  tfr1onlem3ag  6314  omp1eomlem  7068  seq3shft  10791  climshft2  11258  fsum3  11339  ctiunctlemfo  12383  reldvg  13403  dvfvalap  13405  lgsval  13660  lgsneg  13680