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Theorem eqfnfvd 5703
Description: Deduction for equality of functions. (Contributed by Mario Carneiro, 24-Jul-2014.)
Hypotheses
Ref Expression
eqfnfvd.1  |-  ( ph  ->  F  Fn  A )
eqfnfvd.2  |-  ( ph  ->  G  Fn  A )
eqfnfvd.3  |-  ( (
ph  /\  x  e.  A )  ->  ( F `  x )  =  ( G `  x ) )
Assertion
Ref Expression
eqfnfvd  |-  ( ph  ->  F  =  G )
Distinct variable groups:    x, A    x, F    x, G    ph, x

Proof of Theorem eqfnfvd
StepHypRef Expression
1 eqfnfvd.3 . . 3  |-  ( (
ph  /\  x  e.  A )  ->  ( F `  x )  =  ( G `  x ) )
21ralrimiva 2581 . 2  |-  ( ph  ->  A. x  e.  A  ( F `  x )  =  ( G `  x ) )
3 eqfnfvd.1 . . 3  |-  ( ph  ->  F  Fn  A )
4 eqfnfvd.2 . . 3  |-  ( ph  ->  G  Fn  A )
5 eqfnfv 5700 . . 3  |-  ( ( F  Fn  A  /\  G  Fn  A )  ->  ( F  =  G  <->  A. x  e.  A  ( F `  x )  =  ( G `  x ) ) )
63, 4, 5syl2anc 411 . 2  |-  ( ph  ->  ( F  =  G  <->  A. x  e.  A  ( F `  x )  =  ( G `  x ) ) )
72, 6mpbird 167 1  |-  ( ph  ->  F  =  G )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    <-> wb 105    = wceq 1373    e. wcel 2178   A.wral 2486    Fn wfn 5285   ` cfv 5290
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 711  ax-5 1471  ax-7 1472  ax-gen 1473  ax-ie1 1517  ax-ie2 1518  ax-8 1528  ax-10 1529  ax-11 1530  ax-i12 1531  ax-bndl 1533  ax-4 1534  ax-17 1550  ax-i9 1554  ax-ial 1558  ax-i5r 1559  ax-14 2181  ax-ext 2189  ax-sep 4178  ax-pow 4234  ax-pr 4269
This theorem depends on definitions:  df-bi 117  df-3an 983  df-tru 1376  df-nf 1485  df-sb 1787  df-eu 2058  df-mo 2059  df-clab 2194  df-cleq 2200  df-clel 2203  df-nfc 2339  df-ral 2491  df-rex 2492  df-v 2778  df-sbc 3006  df-csb 3102  df-un 3178  df-in 3180  df-ss 3187  df-pw 3628  df-sn 3649  df-pr 3650  df-op 3652  df-uni 3865  df-br 4060  df-opab 4122  df-mpt 4123  df-id 4358  df-xp 4699  df-rel 4700  df-cnv 4701  df-co 4702  df-dm 4703  df-iota 5251  df-fun 5292  df-fn 5293  df-fv 5298
This theorem is referenced by:  foeqcnvco  5882  f1eqcocnv  5883  offeq  6195  tfrlem1  6417  frecrdg  6517  updjudhcoinlf  7208  updjudhcoinrg  7209  nnnninfeq  7256  seq3val  10642  seqvalcd  10643  seq3feq2  10658  seq3feq  10662  seqfeq3  10711  ccatlid  11100  ccatrid  11101  ccatass  11102  ccatswrd  11161  swrdccat2  11162  pfxid  11177  ccatpfx  11192  pfxccat1  11193  swrdswrd  11196  cats1un  11212  swrdccatin1  11216  swrdccatin2  11220  pfxccatin12  11224  seq3shft  11264  efcvgfsum  12093  nninfctlemfo  12476  xpsfeq  13292  upxp  14859  uptx  14861  dvidlemap  15278  dvidrelem  15279  dvidsslem  15280  dvrecap  15300  peano4nninf  16145  nninfsellemeqinf  16155  nninffeq  16159  refeq  16169
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