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Theorem opabn1stprc 6358
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 2805 . . . . . . . 8  |-  x  e. 
_V
21biantrur 303 . . . . . . 7  |-  ( ph  <->  ( x  e.  _V  /\  ph ) )
32opabbii 4156 . . . . . 6  |-  { <. x ,  y >.  |  ph }  =  { <. x ,  y >.  |  ( x  e.  _V  /\  ph ) }
43dmeqi 4932 . . . . 5  |-  dom  { <. x ,  y >.  |  ph }  =  dom  {
<. x ,  y >.  |  ( x  e. 
_V  /\  ph ) }
5 id 19 . . . . . . 7  |-  ( E. y ph  ->  E. y ph )
65ralrimivw 2606 . . . . . 6  |-  ( E. y ph  ->  A. x  e.  _V  E. y ph )
7 dmopab3 4944 . . . . . 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 2276 . . . 4  |-  ( E. y ph  ->  dom  {
<. x ,  y >.  |  ph }  =  _V )
10 vprc 4221 . . . . 5  |-  -.  _V  e.  _V
1110a1i 9 . . . 4  |-  ( E. y ph  ->  -.  _V  e.  _V )
129, 11eqneltrd 2327 . . 3  |-  ( E. y ph  ->  -.  dom  { <. x ,  y
>.  |  ph }  e.  _V )
13 dmexg 4996 . . 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 2498 . 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 1397   E.wex 1540    e. wcel 2202    e/ wnel 2497   A.wral 2510   _Vcvv 2802   {copab 4149   dom cdm 4725
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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299  ax-un 4530
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-fal 1403  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-nel 2498  df-ral 2515  df-rex 2516  df-v 2804  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-br 4089  df-opab 4151  df-cnv 4733  df-dm 4735  df-rn 4736
This theorem is referenced by:  griedg0prc  16104
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