Theorem fveq12d 5325

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 5320	. 2 |- ( ph -> ( F ` A ) = ( G ` A ) )
3		fveq12d.2	. . 3 |- ( ph -> A = B )
4	3	fveq2d 5322	. 2 |- ( ph -> ( G ` A ) = ( G ` B ) )
5	2, 4	eqtrd 2121	1 |- ( ph -> ( F ` A ) = ( G ` B ) )

Syntax hints:   -> wi 4   = wceq 1290   ` cfv 5028

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 666  ax-5 1382  ax-7 1383  ax-gen 1384  ax-ie1 1428  ax-ie2 1429  ax-8 1441  ax-10 1442  ax-11 1443  ax-i12 1444  ax-bndl 1445  ax-4 1446  ax-17 1465  ax-i9 1469  ax-ial 1473  ax-i5r 1474  ax-ext 2071

This theorem depends on definitions:  df-bi 116  df-3an 927  df-tru 1293  df-nf 1396  df-sb 1694  df-clab 2076  df-cleq 2082  df-clel 2085  df-nfc 2218  df-rex 2366  df-v 2622  df-un 3004  df-sn 3456  df-pr 3457  df-op 3459  df-uni 3660  df-br 3852  df-iota 4993  df-fv 5036

This theorem is referenced by:  nffvd  5330  fvsng  5507  tfrlem3ag  6088  tfrlem3a  6089  tfrlemi1  6111  tfr1onlem3ag  6116  seq3shft  10326  climshft2  10749  fisum  10832