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Theorem sdomirr 9098
Description: Strict dominance is irreflexive. Theorem 21(i) of [Suppes] p. 97. (Contributed by NM, 4-Jun-1998.)
Assertion
Ref Expression
sdomirr ¬ 𝐴𝐴

Proof of Theorem sdomirr
StepHypRef Expression
1 sdomnen 8974 . . 3 (𝐴𝐴 → ¬ 𝐴𝐴)
2 enrefg 8977 . . 3 (𝐴 ∈ V → 𝐴𝐴)
31, 2nsyl3 139 . 2 (𝐴 ∈ V → ¬ 𝐴𝐴)
4 relsdom 8946 . . . 4 Rel ≺
54brrelex1i 5717 . . 3 (𝐴𝐴𝐴 ∈ V)
65con3i 155 . 2 𝐴 ∈ V → ¬ 𝐴𝐴)
73, 6pm2.61i 184 1 ¬ 𝐴𝐴
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wcel 2143  Vcvv 3455   class class class wbr 5109  cen 8936  csdm 8938
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-ext 2735  ax-sep 5257  ax-pow 5336  ax-pr 5404  ax-un 7732
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-sb 2097  df-clab 2742  df-cleq 2755  df-clel 2838  df-ral 3080  df-rex 3090  df-rab 3417  df-v 3457  df-dif 3908  df-un 3910  df-in 3912  df-ss 3922  df-nul 4287  df-if 4488  df-pw 4564  df-sn 4590  df-pr 4592  df-op 4596  df-uni 4873  df-br 5110  df-opab 5174  df-id 5556  df-xp 5667  df-rel 5668  df-cnv 5669  df-co 5670  df-dm 5671  df-rn 5672  df-res 5673  df-ima 5674  df-fun 6538  df-fn 6539  df-f 6540  df-f1 6541  df-fo 6542  df-f1o 6543  df-en 8940  df-dom 8941  df-sdom 8942
This theorem is referenced by:  sdomn2lp  9100  2pwuninel  9116  2pwne  9117  r111  9743  alephval2  10552  alephom  10565  csdfil  24051
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