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Theorem soasym 31657
Description: Asymmetry law for strict orderings. (Contributed by Scott Fenton, 24-Nov-2021.)
Assertion
Ref Expression
soasym  |-  ( ( R  Or  A  /\  ( X  e.  A  /\  Y  e.  A
) )  ->  ( X R Y  ->  -.  Y R X ) )

Proof of Theorem soasym
StepHypRef Expression
1 sotric 5061 . 2  |-  ( ( R  Or  A  /\  ( X  e.  A  /\  Y  e.  A
) )  ->  ( X R Y  <->  -.  ( X  =  Y  \/  Y R X ) ) )
2 pm2.46 413 . 2  |-  ( -.  ( X  =  Y  \/  Y R X )  ->  -.  Y R X )
31, 2syl6bi 243 1  |-  ( ( R  Or  A  /\  ( X  e.  A  /\  Y  e.  A
) )  ->  ( X R Y  ->  -.  Y R X ) )
Colors of variables: wff setvar class
Syntax hints:   -. wn 3    -> wi 4    \/ wo 383    /\ wa 384    = wceq 1483    e. wcel 1990   class class class wbr 4653    Or wor 5034
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
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1038  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ral 2917  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-po 5035  df-so 5036
This theorem is referenced by:  noresle  31846  noprefixmo  31848  nosupbnd1lem1  31854  nosupbnd1lem4  31857  nosupbnd2lem1  31861  nosupbnd2  31862  sltasym  31873
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