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Mathbox for Peter Mazsa |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > eldisjn0el | Structured version Visualization version GIF version |
Description: Special case of disjdmqseq 38786 (perhaps this is the closest theorem to the former prter2 38862). (Contributed by Peter Mazsa, 26-Sep-2021.) |
Ref | Expression |
---|---|
eldisjn0el | ⊢ ( ElDisj 𝐴 → (¬ ∅ ∈ 𝐴 ↔ (∪ 𝐴 / ∼ 𝐴) = 𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | disjdmqseq 38786 | . 2 ⊢ ( Disj (◡ E ↾ 𝐴) → ((dom (◡ E ↾ 𝐴) / (◡ E ↾ 𝐴)) = 𝐴 ↔ (dom ≀ (◡ E ↾ 𝐴) / ≀ (◡ E ↾ 𝐴)) = 𝐴)) | |
2 | df-eldisj 38688 | . 2 ⊢ ( ElDisj 𝐴 ↔ Disj (◡ E ↾ 𝐴)) | |
3 | n0el3 38632 | . . 3 ⊢ (¬ ∅ ∈ 𝐴 ↔ (dom (◡ E ↾ 𝐴) / (◡ E ↾ 𝐴)) = 𝐴) | |
4 | dmqs1cosscnvepreseq 38643 | . . . 4 ⊢ ((dom ≀ (◡ E ↾ 𝐴) / ≀ (◡ E ↾ 𝐴)) = 𝐴 ↔ (∪ 𝐴 / ∼ 𝐴) = 𝐴) | |
5 | 4 | bicomi 224 | . . 3 ⊢ ((∪ 𝐴 / ∼ 𝐴) = 𝐴 ↔ (dom ≀ (◡ E ↾ 𝐴) / ≀ (◡ E ↾ 𝐴)) = 𝐴) |
6 | 3, 5 | bibi12i 339 | . 2 ⊢ ((¬ ∅ ∈ 𝐴 ↔ (∪ 𝐴 / ∼ 𝐴) = 𝐴) ↔ ((dom (◡ E ↾ 𝐴) / (◡ E ↾ 𝐴)) = 𝐴 ↔ (dom ≀ (◡ E ↾ 𝐴) / ≀ (◡ E ↾ 𝐴)) = 𝐴)) |
7 | 1, 2, 6 | 3imtr4i 292 | 1 ⊢ ( ElDisj 𝐴 → (¬ ∅ ∈ 𝐴 ↔ (∪ 𝐴 / ∼ 𝐴) = 𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 = wceq 1536 ∈ wcel 2105 ∅c0 4338 ∪ cuni 4911 E cep 5587 ◡ccnv 5687 dom cdm 5688 ↾ cres 5690 / cqs 8742 ≀ ccoss 38161 ∼ ccoels 38162 Disj wdisjALTV 38195 ElDisj weldisj 38197 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1791 ax-4 1805 ax-5 1907 ax-6 1964 ax-7 2004 ax-8 2107 ax-9 2115 ax-10 2138 ax-11 2154 ax-12 2174 ax-ext 2705 ax-sep 5301 ax-nul 5311 ax-pr 5437 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1539 df-fal 1549 df-ex 1776 df-nf 1780 df-sb 2062 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2726 df-clel 2813 df-nfc 2889 df-ne 2938 df-ral 3059 df-rex 3068 df-rmo 3377 df-rab 3433 df-v 3479 df-dif 3965 df-un 3967 df-in 3969 df-ss 3979 df-nul 4339 df-if 4531 df-sn 4631 df-pr 4633 df-op 4637 df-uni 4912 df-br 5148 df-opab 5210 df-id 5582 df-eprel 5588 df-xp 5694 df-rel 5695 df-cnv 5696 df-co 5697 df-dm 5698 df-rn 5699 df-res 5700 df-ima 5701 df-ec 8745 df-qs 8749 df-coss 38392 df-coels 38393 df-cnvrefrel 38508 df-disjALTV 38686 df-eldisj 38688 |
This theorem is referenced by: mainer 38815 |
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