| Mathbox for Thierry Arnoux |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > opeldifid | Structured version Visualization version GIF version | ||
| Description: Ordered pair elementhood outside of the diagonal. (Contributed by Thierry Arnoux, 1-Jan-2020.) |
| Ref | Expression |
|---|---|
| opeldifid | ⊢ (Rel 𝐴 → (〈𝑋, 𝑌〉 ∈ (𝐴 ∖ I ) ↔ (〈𝑋, 𝑌〉 ∈ 𝐴 ∧ 𝑋 ≠ 𝑌))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | reldif 5804 | . . . 4 ⊢ (Rel 𝐴 → Rel (𝐴 ∖ I )) | |
| 2 | brrelex2 5717 | . . . 4 ⊢ ((Rel (𝐴 ∖ I ) ∧ 𝑋(𝐴 ∖ I )𝑌) → 𝑌 ∈ V) | |
| 3 | 1, 2 | sylan 592 | . . 3 ⊢ ((Rel 𝐴 ∧ 𝑋(𝐴 ∖ I )𝑌) → 𝑌 ∈ V) |
| 4 | brrelex2 5717 | . . . 4 ⊢ ((Rel 𝐴 ∧ 𝑋𝐴𝑌) → 𝑌 ∈ V) | |
| 5 | 4 | adantrr 730 | . . 3 ⊢ ((Rel 𝐴 ∧ (𝑋𝐴𝑌 ∧ 𝑋 ≠ 𝑌)) → 𝑌 ∈ V) |
| 6 | brdif 5166 | . . . 4 ⊢ (𝑋(𝐴 ∖ I )𝑌 ↔ (𝑋𝐴𝑌 ∧ ¬ 𝑋 I 𝑌)) | |
| 7 | ideqg 5839 | . . . . . 6 ⊢ (𝑌 ∈ V → (𝑋 I 𝑌 ↔ 𝑋 = 𝑌)) | |
| 8 | 7 | necon3bbid 2997 | . . . . 5 ⊢ (𝑌 ∈ V → (¬ 𝑋 I 𝑌 ↔ 𝑋 ≠ 𝑌)) |
| 9 | 8 | anbi2d 642 | . . . 4 ⊢ (𝑌 ∈ V → ((𝑋𝐴𝑌 ∧ ¬ 𝑋 I 𝑌) ↔ (𝑋𝐴𝑌 ∧ 𝑋 ≠ 𝑌))) |
| 10 | 6, 9 | bitrid 286 | . . 3 ⊢ (𝑌 ∈ V → (𝑋(𝐴 ∖ I )𝑌 ↔ (𝑋𝐴𝑌 ∧ 𝑋 ≠ 𝑌))) |
| 11 | 3, 5, 10 | pm5.21nd 814 | . 2 ⊢ (Rel 𝐴 → (𝑋(𝐴 ∖ I )𝑌 ↔ (𝑋𝐴𝑌 ∧ 𝑋 ≠ 𝑌))) |
| 12 | df-br 5112 | . 2 ⊢ (𝑋(𝐴 ∖ I )𝑌 ↔ 〈𝑋, 𝑌〉 ∈ (𝐴 ∖ I )) | |
| 13 | df-br 5112 | . . 3 ⊢ (𝑋𝐴𝑌 ↔ 〈𝑋, 𝑌〉 ∈ 𝐴) | |
| 14 | 13 | anbi1i 636 | . 2 ⊢ ((𝑋𝐴𝑌 ∧ 𝑋 ≠ 𝑌) ↔ (〈𝑋, 𝑌〉 ∈ 𝐴 ∧ 𝑋 ≠ 𝑌)) |
| 15 | 11, 12, 14 | 3bitr3g 316 | 1 ⊢ (Rel 𝐴 → (〈𝑋, 𝑌〉 ∈ (𝐴 ∖ I ) ↔ (〈𝑋, 𝑌〉 ∈ 𝐴 ∧ 𝑋 ≠ 𝑌))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 401 ∈ wcel 2146 ≠ wne 2960 Vcvv 3457 ∖ cdif 3903 〈cop 4597 class class class wbr 5111 I cid 5557 Rel wrel 5668 |
| 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 2148 ax-9 2156 ax-ext 2737 ax-sep 5259 ax-pr 5406 |
| 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-sb 2100 df-clab 2744 df-cleq 2757 df-clel 2840 df-ne 2961 df-ral 3082 df-rex 3092 df-rab 3419 df-v 3459 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-sn 4592 df-pr 4594 df-op 4598 df-br 5112 df-opab 5176 df-id 5558 df-xp 5669 df-rel 5670 |
| This theorem is used by: qtophaus 34249 |
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