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Theorem cnvsn 5618
Description: Converse of a singleton of an ordered pair. (Contributed by NM, 11-May-1998.) (Revised by Mario Carneiro, 26-Apr-2015.)
Hypotheses
Ref Expression
cnvsn.1  |-  A  e. 
_V
cnvsn.2  |-  B  e. 
_V
Assertion
Ref Expression
cnvsn  |-  `' { <. A ,  B >. }  =  { <. B ,  A >. }

Proof of Theorem cnvsn
StepHypRef Expression
1 cnvcnvsn 5612 . 2  |-  `' `' { <. B ,  A >. }  =  `' { <. A ,  B >. }
2 cnvsn.2 . . . 4  |-  B  e. 
_V
3 cnvsn.1 . . . 4  |-  A  e. 
_V
42, 3relsnop 5224 . . 3  |-  Rel  { <. B ,  A >. }
5 dfrel2 5583 . . 3  |-  ( Rel 
{ <. B ,  A >. }  <->  `' `' { <. B ,  A >. }  =  { <. B ,  A >. } )
64, 5mpbi 220 . 2  |-  `' `' { <. B ,  A >. }  =  { <. B ,  A >. }
71, 6eqtr3i 2646 1  |-  `' { <. A ,  B >. }  =  { <. B ,  A >. }
Colors of variables: wff setvar class
Syntax hints:    = wceq 1483    e. wcel 1990   _Vcvv 3200   {csn 4177   <.cop 4183   `'ccnv 5113   Rel wrel 5119
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pr 4906
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ral 2917  df-rex 2918  df-rab 2921  df-v 3202  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-sn 4178  df-pr 4180  df-op 4184  df-br 4654  df-opab 4713  df-xp 5120  df-rel 5121  df-cnv 5122
This theorem is referenced by:  op2ndb  5619  cnvsng  5621  f1osn  6176  1sdom  8163  ex-cnv  27294
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