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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 9592 | . . . 4 ⊢ ◡ E ≠ E | |
| 2 | 1 | neii 2959 | . . 3 ⊢ ¬ ◡ E = E |
| 3 | 2 | intnanr 493 | . 2 ⊢ ¬ (◡ E = E ∧ Rel E ) |
| 4 | dfsymrel4 39391 | . 2 ⊢ ( SymRel E ↔ (◡ E = E ∧ Rel E )) | |
| 5 | 3, 4 | mtbir 326 | 1 ⊢ ¬ SymRel E |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 ∧ wa 401 = wceq 1570 E cep 5558 ◡ccnv 5658 Rel wrel 5664 SymRel wsymrel 38951 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2734 ax-sep 5255 ax-nul 5267 ax-pr 5402 ax-reg 9568 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-clab 2741 df-cleq 2754 df-clel 2837 df-ne 2958 df-ral 3079 df-rex 3089 df-rab 3415 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-br 5108 df-opab 5172 df-eprel 5559 df-fr 5612 df-xp 5665 df-rel 5666 df-cnv 5667 df-dm 5669 df-rn 5670 df-res 5671 df-symrel 39380 |
| This theorem is used by: (None) |
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