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Theorem fnopabg 5367
Description: Functionality and domain of an ordered-pair class abstraction. (Contributed by NM, 30-Jan-2004.) (Proof shortened by Mario Carneiro, 4-Dec-2016.)
Hypothesis
Ref Expression
fnopabg.1  |-  F  =  { <. x ,  y
>.  |  ( x  e.  A  /\  ph ) }
Assertion
Ref Expression
fnopabg  |-  ( A. x  e.  A  E! y ph  <->  F  Fn  A
)
Distinct variable group:    x, y, A
Allowed substitution hints:    ph( x, y)    F( x, y)

Proof of Theorem fnopabg
StepHypRef Expression
1 moanimv 2201 . . . . . 6  |-  ( E* y ( x  e.  A  /\  ph )  <->  ( x  e.  A  ->  E* y ph ) )
21albii 1553 . . . . 5  |-  ( A. x E* y ( x  e.  A  /\  ph ) 
<-> 
A. x ( x  e.  A  ->  E* y ph ) )
3 funopab 5287 . . . . 5  |-  ( Fun 
{ <. x ,  y
>.  |  ( x  e.  A  /\  ph ) } 
<-> 
A. x E* y
( x  e.  A  /\  ph ) )
4 df-ral 2548 . . . . 5  |-  ( A. x  e.  A  E* y ph  <->  A. x ( x  e.  A  ->  E* y ph ) )
52, 3, 43bitr4ri 269 . . . 4  |-  ( A. x  e.  A  E* y ph  <->  Fun  { <. x ,  y >.  |  ( x  e.  A  /\  ph ) } )
6 dmopab3 4891 . . . 4  |-  ( A. x  e.  A  E. y ph  <->  dom  { <. x ,  y >.  |  ( x  e.  A  /\  ph ) }  =  A )
75, 6anbi12i 678 . . 3  |-  ( ( A. x  e.  A  E* y ph  /\  A. x  e.  A  E. y ph )  <->  ( Fun  {
<. x ,  y >.  |  ( x  e.  A  /\  ph ) }  /\  dom  { <. x ,  y >.  |  ( x  e.  A  /\  ph ) }  =  A ) )
8 r19.26 2675 . . 3  |-  ( A. x  e.  A  ( E* y ph  /\  E. y ph )  <->  ( A. x  e.  A  E* y ph  /\  A. x  e.  A  E. y ph ) )
9 df-fn 5258 . . 3  |-  ( {
<. x ,  y >.  |  ( x  e.  A  /\  ph ) }  Fn  A  <->  ( Fun  {
<. x ,  y >.  |  ( x  e.  A  /\  ph ) }  /\  dom  { <. x ,  y >.  |  ( x  e.  A  /\  ph ) }  =  A ) )
107, 8, 93bitr4i 268 . 2  |-  ( A. x  e.  A  ( E* y ph  /\  E. y ph )  <->  { <. x ,  y >.  |  ( x  e.  A  /\  ph ) }  Fn  A
)
11 eu5 2181 . . . 4  |-  ( E! y ph  <->  ( E. y ph  /\  E* y ph ) )
12 ancom 437 . . . 4  |-  ( ( E. y ph  /\  E* y ph )  <->  ( E* y ph  /\  E. y ph ) )
1311, 12bitri 240 . . 3  |-  ( E! y ph  <->  ( E* y ph  /\  E. y ph ) )
1413ralbii 2567 . 2  |-  ( A. x  e.  A  E! y ph  <->  A. x  e.  A  ( E* y ph  /\  E. y ph ) )
15 fnopabg.1 . . 3  |-  F  =  { <. x ,  y
>.  |  ( x  e.  A  /\  ph ) }
1615fneq1i 5338 . 2  |-  ( F  Fn  A  <->  { <. x ,  y >.  |  ( x  e.  A  /\  ph ) }  Fn  A
)
1710, 14, 163bitr4i 268 1  |-  ( A. x  e.  A  E! y ph  <->  F  Fn  A
)
Colors of variables: wff set class
Syntax hints:    -> wi 4    <-> wb 176    /\ wa 358   A.wal 1527   E.wex 1528    = wceq 1623    e. wcel 1684   E!weu 2143   E*wmo 2144   A.wral 2543   {copab 4076   dom cdm 4689   Fun wfun 5249    Fn wfn 5250
This theorem is referenced by:  fnopab  5368  mptfng  5369  axcontlem2  24593
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1533  ax-5 1544  ax-17 1603  ax-9 1635  ax-8 1643  ax-14 1688  ax-6 1703  ax-7 1708  ax-11 1715  ax-12 1866  ax-ext 2264  ax-sep 4141  ax-nul 4149  ax-pr 4214
This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3an 936  df-tru 1310  df-ex 1529  df-nf 1532  df-sb 1630  df-eu 2147  df-mo 2148  df-clab 2270  df-cleq 2276  df-clel 2279  df-nfc 2408  df-ne 2448  df-ral 2548  df-rex 2549  df-rab 2552  df-v 2790  df-dif 3155  df-un 3157  df-in 3159  df-ss 3166  df-nul 3456  df-if 3566  df-sn 3646  df-pr 3647  df-op 3649  df-br 4024  df-opab 4078  df-id 4309  df-xp 4695  df-rel 4696  df-cnv 4697  df-co 4698  df-dm 4699  df-fun 5257  df-fn 5258
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