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Theorem cnvcnv3 5080
Description: The set of all ordered pairs in a class is the same as the double converse. (Contributed by Mario Carneiro, 16-Aug-2015.)
Assertion
Ref Expression
cnvcnv3  |-  `' `' R  =  { <. x ,  y >.  |  x R y }
Distinct variable group:    x, y, R

Proof of Theorem cnvcnv3
StepHypRef Expression
1 df-cnv 4636 . 2  |-  `' `' R  =  { <. x ,  y >.  |  y `' R x }
2 vex 2742 . . . 4  |-  y  e. 
_V
3 vex 2742 . . . 4  |-  x  e. 
_V
42, 3brcnv 4812 . . 3  |-  ( y `' R x  <->  x R
y )
54opabbii 4072 . 2  |-  { <. x ,  y >.  |  y `' R x }  =  { <. x ,  y
>.  |  x R
y }
61, 5eqtri 2198 1  |-  `' `' R  =  { <. x ,  y >.  |  x R y }
Colors of variables: wff set class
Syntax hints:    = wceq 1353   class class class wbr 4005   {copab 4065   `'ccnv 4627
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-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-14 2151  ax-ext 2159  ax-sep 4123  ax-pow 4176  ax-pr 4211
This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-nf 1461  df-sb 1763  df-eu 2029  df-mo 2030  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-v 2741  df-un 3135  df-in 3137  df-ss 3144  df-pw 3579  df-sn 3600  df-pr 3601  df-op 3603  df-br 4006  df-opab 4067  df-cnv 4636
This theorem is referenced by:  dfrel4v  5082
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