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Theorem epnsymrel 35678
Description: The membership (epsilon) relation is not symmetric. (Contributed by AV, 18-Jun-2022.)
Assertion
Ref Expression
epnsymrel ¬ SymRel E

Proof of Theorem epnsymrel
StepHypRef Expression
1 epnsym 9060 . . . 4 E ≠ E
21neii 3015 . . 3 ¬ E = E
32intnanr 488 . 2 ¬ ( E = E ∧ Rel E )
4 dfsymrel4 35667 . 2 ( SymRel E ↔ ( E = E ∧ Rel E ))
53, 4mtbir 324 1 ¬ SymRel E
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wa 396   = wceq 1528   E cep 5457  ccnv 5547  Rel wrel 5553   SymRel wsymrel 35346
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1787  ax-4 1801  ax-5 1902  ax-6 1961  ax-7 2006  ax-8 2107  ax-9 2115  ax-10 2136  ax-11 2151  ax-12 2167  ax-ext 2790  ax-sep 5194  ax-nul 5201  ax-pr 5320  ax-reg 9044
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 842  df-3an 1081  df-tru 1531  df-ex 1772  df-nf 1776  df-sb 2061  df-mo 2615  df-eu 2647  df-clab 2797  df-cleq 2811  df-clel 2890  df-nfc 2960  df-ne 3014  df-ral 3140  df-rex 3141  df-rab 3144  df-v 3494  df-sbc 3770  df-dif 3936  df-un 3938  df-in 3940  df-ss 3949  df-nul 4289  df-if 4464  df-sn 4558  df-pr 4560  df-op 4564  df-br 5058  df-opab 5120  df-eprel 5458  df-fr 5507  df-xp 5554  df-rel 5555  df-cnv 5556  df-dm 5558  df-rn 5559  df-res 5560  df-symrel 35660
This theorem is referenced by: (None)
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