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Theorem feq1d 5469
Description: Equality deduction for functions. (Contributed by NM, 19-Feb-2008.)
Hypothesis
Ref Expression
feq1d.1  |-  ( ph  ->  F  =  G )
Assertion
Ref Expression
feq1d  |-  ( ph  ->  ( F : A --> B 
<->  G : A --> B ) )

Proof of Theorem feq1d
StepHypRef Expression
1 feq1d.1 . 2  |-  ( ph  ->  F  =  G )
2 feq1 5465 . 2  |-  ( F  =  G  ->  ( F : A --> B  <->  G : A
--> B ) )
31, 2syl 14 1  |-  ( ph  ->  ( F : A --> B 
<->  G : A --> B ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    <-> wb 105    = wceq 1397   -->wf 5322
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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-ext 2213
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-v 2804  df-un 3204  df-in 3206  df-ss 3213  df-sn 3675  df-pr 3676  df-op 3678  df-br 4089  df-opab 4151  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-fun 5328  df-fn 5329  df-f 5330
This theorem is referenced by:  feq12d  5472  fco2  5501  fssres2  5514  fresin  5515  fmpt3d  5803  fmptco  5813  fressnfv  5840  off  6247  caofinvl  6260  f2ndf  6390  eroprf  6796  pmresg  6844  pw2f1odclem  7019  fseq1p1m1  10328  mgmplusf  13448  mgmb1mgm1  13450  grpsubf  13661  lmodscaf  14323  lmbr  14936  blfps  15132  blf  15133  dvmptclx  15441  lgsfcl3  15749
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