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Theorem sdomirr 9180
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 9041 . . 3 (𝐴𝐴 → ¬ 𝐴𝐴)
2 enrefg 9044 . . 3 (𝐴 ∈ V → 𝐴𝐴)
31, 2nsyl3 138 . 2 (𝐴 ∈ V → ¬ 𝐴𝐴)
4 relsdom 9010 . . . 4 Rel ≺
54brrelex1i 5756 . . 3 (𝐴𝐴𝐴 ∈ V)
65con3i 154 . 2 𝐴 ∈ V → ¬ 𝐴𝐴)
73, 6pm2.61i 182 1 ¬ 𝐴𝐴
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wcel 2108  Vcvv 3488   class class class wbr 5166  cen 9000  csdm 9002
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1793  ax-4 1807  ax-5 1909  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-12 2178  ax-ext 2711  ax-sep 5317  ax-nul 5324  ax-pow 5383  ax-pr 5447  ax-un 7770
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 847  df-3an 1089  df-tru 1540  df-fal 1550  df-ex 1778  df-sb 2065  df-mo 2543  df-eu 2572  df-clab 2718  df-cleq 2732  df-clel 2819  df-ral 3068  df-rex 3077  df-rab 3444  df-v 3490  df-dif 3979  df-un 3981  df-in 3983  df-ss 3993  df-nul 4353  df-if 4549  df-pw 4624  df-sn 4649  df-pr 4651  df-op 4655  df-uni 4932  df-br 5167  df-opab 5229  df-id 5593  df-xp 5706  df-rel 5707  df-cnv 5708  df-co 5709  df-dm 5710  df-rn 5711  df-res 5712  df-ima 5713  df-fun 6575  df-fn 6576  df-f 6577  df-f1 6578  df-fo 6579  df-f1o 6580  df-en 9004  df-dom 9005  df-sdom 9006
This theorem is referenced by:  sdomn2lp  9182  2pwuninel  9198  2pwne  9199  r111  9844  alephval2  10641  alephom  10654  csdfil  23923
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