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Theorem opabresid 4867
Description: The restricted identity expressed with the class builder. (Contributed by FL, 25-Apr-2012.)
Assertion
Ref Expression
opabresid  |-  { <. x ,  y >.  |  ( x  e.  A  /\  y  =  x ) }  =  (  _I  |`  A )
Distinct variable group:    x, A, y

Proof of Theorem opabresid
StepHypRef Expression
1 resopab 4858 . 2  |-  ( {
<. x ,  y >.  |  y  =  x }  |`  A )  =  { <. x ,  y
>.  |  ( x  e.  A  /\  y  =  x ) }
2 equcom 1682 . . . . 5  |-  ( y  =  x  <->  x  =  y )
32opabbii 3990 . . . 4  |-  { <. x ,  y >.  |  y  =  x }  =  { <. x ,  y
>.  |  x  =  y }
4 df-id 4210 . . . 4  |-  _I  =  { <. x ,  y
>.  |  x  =  y }
53, 4eqtr4i 2161 . . 3  |-  { <. x ,  y >.  |  y  =  x }  =  _I
65reseq1i 4810 . 2  |-  ( {
<. x ,  y >.  |  y  =  x }  |`  A )  =  (  _I  |`  A )
71, 6eqtr3i 2160 1  |-  { <. x ,  y >.  |  ( x  e.  A  /\  y  =  x ) }  =  (  _I  |`  A )
Colors of variables: wff set class
Syntax hints:    /\ wa 103    = wceq 1331    e. wcel 1480   {copab 3983    _I cid 4205    |` cres 4536
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 698  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-10 1483  ax-11 1484  ax-i12 1485  ax-bndl 1486  ax-4 1487  ax-14 1492  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2119  ax-sep 4041  ax-pow 4093  ax-pr 4126
This theorem depends on definitions:  df-bi 116  df-3an 964  df-tru 1334  df-nf 1437  df-sb 1736  df-clab 2124  df-cleq 2130  df-clel 2133  df-nfc 2268  df-ral 2419  df-rex 2420  df-v 2683  df-un 3070  df-in 3072  df-ss 3079  df-pw 3507  df-sn 3528  df-pr 3529  df-op 3531  df-opab 3985  df-id 4210  df-xp 4540  df-rel 4541  df-res 4546
This theorem is referenced by:  mptresid  4868
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