| 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 39220 (perhaps this is the closest theorem to the former prter2 39318). (Contributed by Peter Mazsa, 26-Sep-2021.) |
| Ref | Expression |
|---|---|
| eldisjn0el | ⊢ ( ElDisj 𝐴 → (¬ ∅ ∈ 𝐴 ↔ (∪ 𝐴 / ∼ 𝐴) = 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | disjdmqseq 39220 | . 2 ⊢ ( Disj (◡ E ↾ 𝐴) → ((dom (◡ E ↾ 𝐴) / (◡ E ↾ 𝐴)) = 𝐴 ↔ (dom ≀ (◡ E ↾ 𝐴) / ≀ (◡ E ↾ 𝐴)) = 𝐴)) | |
| 2 | df-eldisj 39104 | . 2 ⊢ ( ElDisj 𝐴 ↔ Disj (◡ E ↾ 𝐴)) | |
| 3 | n0el3 39048 | . . 3 ⊢ (¬ ∅ ∈ 𝐴 ↔ (dom (◡ E ↾ 𝐴) / (◡ E ↾ 𝐴)) = 𝐴) | |
| 4 | dmqs1cosscnvepreseq 39059 | . . . 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 1542 ∈ wcel 2114 ∅c0 4274 ∪ cuni 4851 E cep 5521 ◡ccnv 5621 dom cdm 5622 ↾ cres 5624 / cqs 8633 ≀ ccoss 38495 ∼ ccoels 38496 Disj wdisjALTV 38531 ElDisj weldisj 38533 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5231 ax-nul 5241 ax-pr 5368 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rmo 3343 df-rab 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-id 5517 df-eprel 5522 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-ec 8636 df-qs 8640 df-coss 38813 df-coels 38814 df-cnvrefrel 38919 df-disjALTV 39102 df-eldisj 39104 |
| This theorem is referenced by: mainer 39260 |
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