Theorem fveq12d 5204

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 5200	. 2 |- ( ph -> ( F ` A ) = ( G ` A ) )
3		fveq12d.2	. . 3 |- ( ph -> A = B )
4	3	fveq2d 5202	. 2 |- ( ph -> ( G ` A ) = ( G ` B ) )
5	2, 4	eqtrd 2113	1 |- ( ph -> ( F ` A ) = ( G ` B ) )

Syntax hints:   -> wi 4   = wceq 1284   ` cfv 4922

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-io 662  ax-5 1376  ax-7 1377  ax-gen 1378  ax-ie1 1422  ax-ie2 1423  ax-8 1435  ax-10 1436  ax-11 1437  ax-i12 1438  ax-bndl 1439  ax-4 1440  ax-17 1459  ax-i9 1463  ax-ial 1467  ax-i5r 1468  ax-ext 2063

This theorem depends on definitions:  df-bi 115  df-3an 921  df-tru 1287  df-nf 1390  df-sb 1686  df-clab 2068  df-cleq 2074  df-clel 2077  df-nfc 2208  df-rex 2354  df-v 2603  df-un 2977  df-sn 3404  df-pr 3405  df-op 3407  df-uni 3602  df-br 3786  df-iota 4887  df-fv 4930

This theorem is referenced by:  nffvd  5207  fvsng  5380  tfrlem3ag  5947  tfrlem3a  5948  tfrlemi1  5969  climshft2  10145