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Theorem sdomirr 8783
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 8657 . . 3 (𝐴𝐴 → ¬ 𝐴𝐴)
2 enrefg 8660 . . 3 (𝐴 ∈ V → 𝐴𝐴)
31, 2nsyl3 140 . 2 (𝐴 ∈ V → ¬ 𝐴𝐴)
4 relsdom 8633 . . . 4 Rel ≺
54brrelex1i 5605 . . 3 (𝐴𝐴𝐴 ∈ V)
65con3i 157 . 2 𝐴 ∈ V → ¬ 𝐴𝐴)
73, 6pm2.61i 185 1 ¬ 𝐴𝐴
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wcel 2110  Vcvv 3408   class class class wbr 5053  cen 8623  csdm 8625
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1803  ax-4 1817  ax-5 1918  ax-6 1976  ax-7 2016  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2158  ax-12 2175  ax-ext 2708  ax-sep 5192  ax-nul 5199  ax-pow 5258  ax-pr 5322  ax-un 7523
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 848  df-3an 1091  df-tru 1546  df-fal 1556  df-ex 1788  df-nf 1792  df-sb 2071  df-mo 2539  df-eu 2568  df-clab 2715  df-cleq 2729  df-clel 2816  df-nfc 2886  df-ral 3066  df-rex 3067  df-rab 3070  df-v 3410  df-dif 3869  df-un 3871  df-in 3873  df-ss 3883  df-nul 4238  df-if 4440  df-pw 4515  df-sn 4542  df-pr 4544  df-op 4548  df-uni 4820  df-br 5054  df-opab 5116  df-id 5455  df-xp 5557  df-rel 5558  df-cnv 5559  df-co 5560  df-dm 5561  df-rn 5562  df-res 5563  df-ima 5564  df-fun 6382  df-fn 6383  df-f 6384  df-f1 6385  df-fo 6386  df-f1o 6387  df-en 8627  df-dom 8628  df-sdom 8629
This theorem is referenced by:  sdomn2lp  8785  2pwuninel  8801  2pwne  8802  r111  9391  alephval2  10186  alephom  10199  csdfil  22791
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