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Theorem relopabi 4905
Description: A class of ordered pairs is a relation. (Contributed by Mario Carneiro, 21-Dec-2013.)
Hypothesis
Ref Expression
relopabi.1  |-  A  =  { <. x ,  y
>.  |  ph }
Assertion
Ref Expression
relopabi  |-  Rel  A

Proof of Theorem relopabi
Dummy variable  z is distinct from all other variables.
StepHypRef Expression
1 relopabi.1 . . . 4  |-  A  =  { <. x ,  y
>.  |  ph }
2 df-opab 4193 . . . 4  |-  { <. x ,  y >.  |  ph }  =  { z  |  E. x E. y
( z  =  <. x ,  y >.  /\  ph ) }
31, 2eqtri 2259 . . 3  |-  A  =  { z  |  E. x E. y ( z  =  <. x ,  y
>.  /\  ph ) }
4 vex 2824 . . . . . . . 8  |-  x  e. 
_V
5 vex 2824 . . . . . . . 8  |-  y  e. 
_V
64, 5opelvv 4825 . . . . . . 7  |-  <. x ,  y >.  e.  ( _V  X.  _V )
7 eleq1 2301 . . . . . . 7  |-  ( z  =  <. x ,  y
>.  ->  ( z  e.  ( _V  X.  _V ) 
<-> 
<. x ,  y >.  e.  ( _V  X.  _V ) ) )
86, 7mpbiri 168 . . . . . 6  |-  ( z  =  <. x ,  y
>.  ->  z  e.  ( _V  X.  _V )
)
98adantr 276 . . . . 5  |-  ( ( z  =  <. x ,  y >.  /\  ph )  ->  z  e.  ( _V  X.  _V )
)
109exlimivv 1952 . . . 4  |-  ( E. x E. y ( z  =  <. x ,  y >.  /\  ph )  ->  z  e.  ( _V  X.  _V )
)
1110abssi 3323 . . 3  |-  { z  |  E. x E. y ( z  = 
<. x ,  y >.  /\  ph ) }  C_  ( _V  X.  _V )
123, 11eqsstri 3280 . 2  |-  A  C_  ( _V  X.  _V )
13 df-rel 4781 . 2  |-  ( Rel 
A  <->  A  C_  ( _V 
X.  _V ) )
1412, 13mpbir 146 1  |-  Rel  A
Colors of variables:    wff set class
This proof depends on syntax axioms:    /\ wa 104    = wceq 1402   E.wex 1545    e. wcel 2209   {cab 2224   _Vcvv 2821    C_ wss 3220   <.cop 3712   {copab 4191    X. cxp 4772   Rel wrel 4779
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4249  ax-pow 4311  ax-pr 4346
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-opab 4193  df-xp 4780  df-rel 4781
This theorem is used by:  relopab  4906  mptrel  4908  reli  4909  rele  4910  relcnv  5165  cotr  5169  relco  5286  reloprab  6136  reldmoprab  6173  eqer  6839  ecopover  6907  ecopoverg  6910  relen  7026  reldom  7027  enq0er  7802  aprcl  8974  aptap  8978  climrel  12046  brstruct  13361
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