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| Mirrors > Home > MPE Home > Th. List > Mathboxes > epnsymrel | Structured version Visualization version GIF version | ||
| Description: The membership (epsilon) relation is not symmetric. (Contributed by AV, 18-Jun-2022.) |
| Ref | Expression |
|---|---|
| epnsymrel | ⊢ ¬ SymRel E |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | epnsym 9566 | . . . 4 ⊢ ◡ E ≠ E | |
| 2 | 1 | neii 2962 | . . 3 ⊢ ¬ ◡ E = E |
| 3 | 2 | intnanr 492 | . 2 ⊢ ¬ (◡ E = E ∧ Rel E ) |
| 4 | dfsymrel4 39146 | . 2 ⊢ ( SymRel E ↔ (◡ E = E ∧ Rel E )) | |
| 5 | 3, 4 | mtbir 326 | 1 ⊢ ¬ SymRel E |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ∧ wa 400 = wceq 1563 E cep 5551 ◡ccnv 5651 Rel wrel 5657 SymRel wsymrel 38706 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2737 ax-sep 5251 ax-nul 5261 ax-pr 5395 ax-reg 9542 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-nf 1807 df-sb 2094 df-clab 2744 df-cleq 2757 df-clel 2840 df-ne 2961 df-ral 3080 df-rex 3090 df-rab 3418 df-v 3459 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-nul 4289 df-if 4484 df-pw 4560 df-sn 4586 df-pr 4588 df-op 4592 df-br 5106 df-opab 5168 df-eprel 5552 df-fr 5605 df-xp 5658 df-rel 5659 df-cnv 5660 df-dm 5662 df-rn 5663 df-res 5664 df-symrel 39135 |
| This theorem is referenced by: (None) |
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