Theorem eqfnfvd 5586

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 2539	. 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 5583	. . 3 |- ( ( F Fn A /\ G Fn A ) -> ( F = G <-> A. x e. A ( F ` x ) = ( G ` x ) ) )
6	3, 4, 5	syl2anc 409	. 2 |- ( ph -> ( F = G <-> A. x e. A ( F ` x ) = ( G ` x ) ) )
7	2, 6	mpbird 166	1 |- ( ph -> F = G )

Syntax hints:   -> wi 4   /\ wa 103   <-> wb 104   = wceq 1343   e. wcel 2136   A.wral 2444   Fn wfn 5183   ` cfv 5188

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 699  ax-5 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-10 1493  ax-11 1494  ax-i12 1495  ax-bndl 1497  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-14 2139  ax-ext 2147  ax-sep 4100  ax-pow 4153  ax-pr 4187

This theorem depends on definitions:  df-bi 116  df-3an 970  df-tru 1346  df-nf 1449  df-sb 1751  df-eu 2017  df-mo 2018  df-clab 2152  df-cleq 2158  df-clel 2161  df-nfc 2297  df-ral 2449  df-rex 2450  df-v 2728  df-sbc 2952  df-csb 3046  df-un 3120  df-in 3122  df-ss 3129  df-pw 3561  df-sn 3582  df-pr 3583  df-op 3585  df-uni 3790  df-br 3983  df-opab 4044  df-mpt 4045  df-id 4271  df-xp 4610  df-rel 4611  df-cnv 4612  df-co 4613  df-dm 4614  df-iota 5153  df-fun 5190  df-fn 5191  df-fv 5196

This theorem is referenced by:  foeqcnvco  5758  f1eqcocnv  5759  offeq  6063  tfrlem1  6276  frecrdg  6376  updjudhcoinlf  7045  updjudhcoinrg  7046  nnnninfeq  7092  seq3val  10393  seqvalcd  10394  seq3feq2  10405  seq3feq  10407  seqfeq3  10447  seq3shft  10780  efcvgfsum  11608  upxp  12912  uptx  12914  dvidlemap  13300  dvrecap  13317  peano4nninf  13886  nninfsellemeqinf  13896  nninffeq  13900  refeq  13907