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Theorem sdomirr 9034
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 8910 . . 3 (𝐴𝐴 → ¬ 𝐴𝐴)
2 enrefg 8913 . . 3 (𝐴 ∈ V → 𝐴𝐴)
31, 2nsyl3 138 . 2 (𝐴 ∈ V → ¬ 𝐴𝐴)
4 relsdom 8882 . . . 4 Rel ≺
54brrelex1i 5675 . . 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 2113  Vcvv 3437   class class class wbr 5093  cen 8872  csdm 8874
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-ext 2705  ax-sep 5236  ax-nul 5246  ax-pow 5305  ax-pr 5372  ax-un 7674
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-sb 2068  df-clab 2712  df-cleq 2725  df-clel 2808  df-ral 3049  df-rex 3058  df-rab 3397  df-v 3439  df-dif 3901  df-un 3903  df-in 3905  df-ss 3915  df-nul 4283  df-if 4475  df-pw 4551  df-sn 4576  df-pr 4578  df-op 4582  df-uni 4859  df-br 5094  df-opab 5156  df-id 5514  df-xp 5625  df-rel 5626  df-cnv 5627  df-co 5628  df-dm 5629  df-rn 5630  df-res 5631  df-ima 5632  df-fun 6488  df-fn 6489  df-f 6490  df-f1 6491  df-fo 6492  df-f1o 6493  df-en 8876  df-dom 8877  df-sdom 8878
This theorem is referenced by:  sdomn2lp  9036  2pwuninel  9052  2pwne  9053  r111  9675  alephval2  10470  alephom  10483  csdfil  23810
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