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Theorem sotritric 4427
Description: A trichotomy relationship, given a trichotomous order. (Contributed by Jim Kingdon, 28-Sep-2019.)
Hypotheses
Ref Expression
sotritric.or  |-  R  Or  A
sotritric.tri  |-  ( ( B  e.  A  /\  C  e.  A )  ->  ( B R C  \/  B  =  C  \/  C R B ) )
Assertion
Ref Expression
sotritric  |-  ( ( B  e.  A  /\  C  e.  A )  ->  ( B R C  <->  -.  ( B  =  C  \/  C R B ) ) )

Proof of Theorem sotritric
StepHypRef Expression
1 sotritric.or . . 3  |-  R  Or  A
2 sotricim 4426 . . 3  |-  ( ( R  Or  A  /\  ( B  e.  A  /\  C  e.  A
) )  ->  ( B R C  ->  -.  ( B  =  C  \/  C R B ) ) )
31, 2mpan 424 . 2  |-  ( ( B  e.  A  /\  C  e.  A )  ->  ( B R C  ->  -.  ( B  =  C  \/  C R B ) ) )
4 sotritric.tri . . 3  |-  ( ( B  e.  A  /\  C  e.  A )  ->  ( B R C  \/  B  =  C  \/  C R B ) )
5 3orass 1008 . . . 4  |-  ( ( B R C  \/  B  =  C  \/  C R B )  <->  ( B R C  \/  ( B  =  C  \/  C R B ) ) )
6 ax-1 6 . . . . 5  |-  ( B R C  ->  ( -.  ( B  =  C  \/  C R B )  ->  B R C ) )
7 pm2.24 626 . . . . 5  |-  ( ( B  =  C  \/  C R B )  -> 
( -.  ( B  =  C  \/  C R B )  ->  B R C ) )
86, 7jaoi 724 . . . 4  |-  ( ( B R C  \/  ( B  =  C  \/  C R B ) )  ->  ( -.  ( B  =  C  \/  C R B )  ->  B R C ) )
95, 8sylbi 121 . . 3  |-  ( ( B R C  \/  B  =  C  \/  C R B )  -> 
( -.  ( B  =  C  \/  C R B )  ->  B R C ) )
104, 9syl 14 . 2  |-  ( ( B  e.  A  /\  C  e.  A )  ->  ( -.  ( B  =  C  \/  C R B )  ->  B R C ) )
113, 10impbid 129 1  |-  ( ( B  e.  A  /\  C  e.  A )  ->  ( B R C  <->  -.  ( B  =  C  \/  C R B ) ) )
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4    /\ wa 104    <-> wb 105    \/ wo 716    \/ w3o 1004    = wceq 1398    e. wcel 2202   class class class wbr 4093    Or wor 4398
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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2213
This theorem depends on definitions:  df-bi 117  df-3or 1006  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-ral 2516  df-v 2805  df-un 3205  df-sn 3679  df-pr 3680  df-op 3682  df-br 4094  df-po 4399  df-iso 4400
This theorem is referenced by:  nqtric  7679
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