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Theorem sdomirr 8648
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 8532 . . 3 (𝐴𝐴 → ¬ 𝐴𝐴)
2 enrefg 8535 . . 3 (𝐴 ∈ V → 𝐴𝐴)
31, 2nsyl3 140 . 2 (𝐴 ∈ V → ¬ 𝐴𝐴)
4 relsdom 8510 . . . 4 Rel ≺
54brrelex1i 5603 . . 3 (𝐴𝐴𝐴 ∈ V)
65con3i 157 . 2 𝐴 ∈ V → ¬ 𝐴𝐴)
73, 6pm2.61i 184 1 ¬ 𝐴𝐴
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wcel 2110  Vcvv 3495   class class class wbr 5059  cen 8500  csdm 8502
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2156  ax-12 2172  ax-ext 2793  ax-sep 5196  ax-nul 5203  ax-pow 5259  ax-pr 5322  ax-un 7455
This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1536  df-ex 1777  df-nf 1781  df-sb 2066  df-mo 2618  df-eu 2650  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ral 3143  df-rex 3144  df-rab 3147  df-v 3497  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-nul 4292  df-if 4468  df-pw 4541  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4833  df-br 5060  df-opab 5122  df-id 5455  df-xp 5556  df-rel 5557  df-cnv 5558  df-co 5559  df-dm 5560  df-rn 5561  df-res 5562  df-ima 5563  df-fun 6352  df-fn 6353  df-f 6354  df-f1 6355  df-fo 6356  df-f1o 6357  df-en 8504  df-dom 8505  df-sdom 8506
This theorem is referenced by:  sdomn2lp  8650  2pwuninel  8666  2pwne  8667  r111  9198  alephval2  9988  alephom  10001  csdfil  22496
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