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Theorem opabn1stprc 6388
Description: An ordered-pair class abstraction which does not depend on the first abstraction variable is a proper class. There must be, however, at least one set which satisfies the restricting wff. (Contributed by AV, 27-Dec-2020.)
Assertion
Ref Expression
opabn1stprc  |-  ( E. y ph  ->  { <. x ,  y >.  |  ph }  e/  _V )
Distinct variable groups:    x, y    ph, x
Allowed substitution hint:    ph( y)

Proof of Theorem opabn1stprc
StepHypRef Expression
1 vex 2815 . . . . . . . 8  |-  x  e. 
_V
21biantrur 303 . . . . . . 7  |-  ( ph  <->  ( x  e.  _V  /\  ph ) )
32opabbii 4176 . . . . . 6  |-  { <. x ,  y >.  |  ph }  =  { <. x ,  y >.  |  ( x  e.  _V  /\  ph ) }
43dmeqi 4956 . . . . 5  |-  dom  { <. x ,  y >.  |  ph }  =  dom  {
<. x ,  y >.  |  ( x  e. 
_V  /\  ph ) }
5 id 19 . . . . . . 7  |-  ( E. y ph  ->  E. y ph )
65ralrimivw 2616 . . . . . 6  |-  ( E. y ph  ->  A. x  e.  _V  E. y ph )
7 dmopab3 4968 . . . . . 6  |-  ( A. x  e.  _V  E. y ph 
<->  dom  { <. x ,  y >.  |  ( x  e.  _V  /\  ph ) }  =  _V )
86, 7sylib 122 . . . . 5  |-  ( E. y ph  ->  dom  {
<. x ,  y >.  |  ( x  e. 
_V  /\  ph ) }  =  _V )
94, 8eqtrid 2277 . . . 4  |-  ( E. y ph  ->  dom  {
<. x ,  y >.  |  ph }  =  _V )
10 vprc 4241 . . . . 5  |-  -.  _V  e.  _V
1110a1i 9 . . . 4  |-  ( E. y ph  ->  -.  _V  e.  _V )
129, 11eqneltrd 2328 . . 3  |-  ( E. y ph  ->  -.  dom  { <. x ,  y
>.  |  ph }  e.  _V )
13 dmexg 5020 . . 3  |-  ( {
<. x ,  y >.  |  ph }  e.  _V  ->  dom  { <. x ,  y >.  |  ph }  e.  _V )
1412, 13nsyl 633 . 2  |-  ( E. y ph  ->  -.  {
<. x ,  y >.  |  ph }  e.  _V )
15 df-nel 2508 . 2  |-  ( {
<. x ,  y >.  |  ph }  e/  _V  <->  -. 
{ <. x ,  y
>.  |  ph }  e.  _V )
1614, 15sylibr 134 1  |-  ( E. y ph  ->  { <. x ,  y >.  |  ph }  e/  _V )
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4    /\ wa 104    = wceq 1398   E.wex 1541    e. wcel 2203    e/ wnel 2507   A.wral 2520   _Vcvv 2812   {copab 4169   dom cdm 4748
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-in1 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2205  ax-14 2206  ax-ext 2214  ax-sep 4227  ax-pow 4286  ax-pr 4321  ax-un 4553
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-nel 2508  df-ral 2525  df-rex 2526  df-v 2814  df-un 3214  df-in 3216  df-ss 3223  df-pw 3670  df-sn 3694  df-pr 3695  df-op 3697  df-uni 3914  df-br 4109  df-opab 4171  df-cnv 4756  df-dm 4758  df-rn 4759
This theorem is referenced by:  griedg0prc  16232
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