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Theorem sdomirr 9101
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 8977 . . 3 (𝐴𝐴 → ¬ 𝐴𝐴)
2 enrefg 8980 . . 3 (𝐴 ∈ V → 𝐴𝐴)
31, 2nsyl3 139 . 2 (𝐴 ∈ V → ¬ 𝐴𝐴)
4 relsdom 8949 . . . 4 Rel ≺
54brrelex1i 5718 . . 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 2149  Vcvv 3463   class class class wbr 5113  cen 8939  csdm 8941
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1822  ax-4 1836  ax-5 1937  ax-6 1994  ax-7 2035  ax-8 2151  ax-9 2159  ax-ext 2741  ax-sep 5261  ax-pow 5337  ax-pr 5405  ax-un 7733
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1570  df-fal 1580  df-ex 1807  df-sb 2098  df-clab 2748  df-cleq 2761  df-clel 2844  df-ral 3086  df-rex 3096  df-rab 3424  df-v 3465  df-dif 3916  df-un 3918  df-in 3920  df-ss 3930  df-nul 4295  df-if 4493  df-pw 4569  df-sn 4595  df-pr 4597  df-op 4601  df-uni 4877  df-br 5114  df-opab 5178  df-id 5557  df-xp 5668  df-rel 5669  df-cnv 5670  df-co 5671  df-dm 5672  df-rn 5673  df-res 5674  df-ima 5675  df-fun 6539  df-fn 6540  df-f 6541  df-f1 6542  df-fo 6543  df-f1o 6544  df-en 8943  df-dom 8944  df-sdom 8945
This theorem is referenced by:  sdomn2lp  9103  2pwuninel  9119  2pwne  9120  r111  9746  alephval2  10556  alephom  10569  csdfil  24019
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