Theorem eqfnfvd 5737

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

Step	Hyp	Ref	Expression
1		eqfnfvd.3	. . 3 |- ( ( ph /\ x e. A ) -> ( F ` x ) = ( G ` x ) )
2	1	ralrimiva 2603	. 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 5734	. . 3 |- ( ( F Fn A /\ G Fn A ) -> ( F = G <-> A. x e. A ( F ` x ) = ( G ` x ) ) )
6	3, 4, 5	syl2anc 411	. 2 |- ( ph -> ( F = G <-> A. x e. A ( F ` x ) = ( G ` x ) ) )
7	2, 6	mpbird 167	1 |- ( ph -> F = G )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1395   e. wcel 2200   A.wral 2508   Fn wfn 5313   ` cfv 5318

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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-14 2203  ax-ext 2211  ax-sep 4202  ax-pow 4258  ax-pr 4293

This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-v 2801  df-sbc 3029  df-csb 3125  df-un 3201  df-in 3203  df-ss 3210  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-br 4084  df-opab 4146  df-mpt 4147  df-id 4384  df-xp 4725  df-rel 4726  df-cnv 4727  df-co 4728  df-dm 4729  df-iota 5278  df-fun 5320  df-fn 5321  df-fv 5326

This theorem is referenced by:  foeqcnvco  5920  f1eqcocnv  5921  offeq  6238  tfrlem1  6460  frecrdg  6560  updjudhcoinlf  7258  updjudhcoinrg  7259  nnnninfeq  7306  seq3val  10694  seqvalcd  10695  seq3feq2  10710  seq3feq  10714  seqfeq3  10763  ccatlid  11154  ccatrid  11155  ccatass  11156  ccatswrd  11218  swrdccat2  11219  pfxid  11234  ccatpfx  11249  pfxccat1  11250  swrdswrd  11253  cats1un  11269  swrdccatin1  11273  swrdccatin2  11277  pfxccatin12  11281  seq3shft  11365  efcvgfsum  12194  nninfctlemfo  12577  xpsfeq  13394  upxp  14962  uptx  14964  dvidlemap  15381  dvidrelem  15382  dvidsslem  15383  dvrecap  15403  peano4nninf  16460  nninfsellemeqinf  16470  nninffeq  16474  refeq  16484