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Theorem brtp 23276
Description: A condition for a binary relation over an unordered triple. (Contributed by Scott Fenton, 8-Jun-2011.)
Hypotheses
Ref Expression
brtp.1  |-  X  e. 
_V
brtp.2  |-  Y  e. 
_V
Assertion
Ref Expression
brtp  |-  ( X { <. A ,  B >. ,  <. C ,  D >. ,  <. E ,  F >. } Y  <->  ( ( X  =  A  /\  Y  =  B )  \/  ( X  =  C  /\  Y  =  D )  \/  ( X  =  E  /\  Y  =  F ) ) )

Proof of Theorem brtp
StepHypRef Expression
1 df-br 3921 . 2  |-  ( X { <. A ,  B >. ,  <. C ,  D >. ,  <. E ,  F >. } Y  <->  <. X ,  Y >.  e.  { <. A ,  B >. ,  <. C ,  D >. ,  <. E ,  F >. } )
2 opex 4130 . . 3  |-  <. X ,  Y >.  e.  _V
32eltp 3582 . 2  |-  ( <. X ,  Y >.  e. 
{ <. A ,  B >. ,  <. C ,  D >. ,  <. E ,  F >. }  <->  ( <. X ,  Y >.  =  <. A ,  B >.  \/  <. X ,  Y >.  =  <. C ,  D >.  \/  <. X ,  Y >.  =  <. E ,  F >. ) )
4 brtp.1 . . . 4  |-  X  e. 
_V
5 brtp.2 . . . 4  |-  Y  e. 
_V
64, 5opth 4138 . . 3  |-  ( <. X ,  Y >.  = 
<. A ,  B >.  <->  ( X  =  A  /\  Y  =  B )
)
74, 5opth 4138 . . 3  |-  ( <. X ,  Y >.  = 
<. C ,  D >.  <->  ( X  =  C  /\  Y  =  D )
)
84, 5opth 4138 . . 3  |-  ( <. X ,  Y >.  = 
<. E ,  F >.  <->  ( X  =  E  /\  Y  =  F )
)
96, 7, 83orbi123i 1146 . 2  |-  ( (
<. X ,  Y >.  = 
<. A ,  B >.  \/ 
<. X ,  Y >.  = 
<. C ,  D >.  \/ 
<. X ,  Y >.  = 
<. E ,  F >. )  <-> 
( ( X  =  A  /\  Y  =  B )  \/  ( X  =  C  /\  Y  =  D )  \/  ( X  =  E  /\  Y  =  F ) ) )
101, 3, 93bitri 264 1  |-  ( X { <. A ,  B >. ,  <. C ,  D >. ,  <. E ,  F >. } Y  <->  ( ( X  =  A  /\  Y  =  B )  \/  ( X  =  C  /\  Y  =  D )  \/  ( X  =  E  /\  Y  =  F ) ) )
Colors of variables: wff set class
Syntax hints:    <-> wb 178    /\ wa 360    \/ w3o 938    = wceq 1619    e. wcel 1621   _Vcvv 2727   {ctp 3546   <.cop 3547   class class class wbr 3920
This theorem is referenced by:  sltval2  23477  sltsgn1  23482  sltsgn2  23483  sltintdifex  23484  sltres  23485  axsltsolem1  23489  axdenselem8  23510  axdense  23511  axfelem9  23522  axfelem10  23523
This theorem was proved from axioms:  ax-1 7  ax-2 8  ax-3 9  ax-mp 10  ax-5 1533  ax-6 1534  ax-7 1535  ax-gen 1536  ax-8 1623  ax-11 1624  ax-14 1626  ax-17 1628  ax-12o 1664  ax-10 1678  ax-9 1684  ax-4 1692  ax-16 1926  ax-ext 2234  ax-sep 4038  ax-nul 4046  ax-pr 4108
This theorem depends on definitions:  df-bi 179  df-or 361  df-an 362  df-3or 940  df-3an 941  df-tru 1315  df-ex 1538  df-nf 1540  df-sb 1883  df-clab 2240  df-cleq 2246  df-clel 2249  df-nfc 2374  df-ne 2414  df-rab 2516  df-v 2729  df-dif 3081  df-un 3083  df-in 3085  df-ss 3089  df-nul 3363  df-if 3471  df-sn 3550  df-pr 3551  df-tp 3552  df-op 3553  df-br 3921
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