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| Mirrors > Home > MPE Home > Th. List > Mathboxes > pet0 | Structured version Visualization version GIF version | ||
| Description: Class 𝐴 is a partition by the null class if and only if the cosets by the null class are in equivalence relation on it. (Contributed by Peter Mazsa, 31-Dec-2021.) |
| Ref | Expression |
|---|---|
| pet0 | ⊢ (∅ Part 𝐴 ↔ ≀ ∅ ErALTV 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pet02 38779 | . 2 ⊢ (( Disj ∅ ∧ (dom ∅ / ∅) = 𝐴) ↔ ( EqvRel ≀ ∅ ∧ (dom ≀ ∅ / ≀ ∅) = 𝐴)) | |
| 2 | dfpart2 38734 | . 2 ⊢ (∅ Part 𝐴 ↔ ( Disj ∅ ∧ (dom ∅ / ∅) = 𝐴)) | |
| 3 | dferALTV2 38633 | . 2 ⊢ ( ≀ ∅ ErALTV 𝐴 ↔ ( EqvRel ≀ ∅ ∧ (dom ≀ ∅ / ≀ ∅) = 𝐴)) | |
| 4 | 1, 2, 3 | 3bitr4i 303 | 1 ⊢ (∅ Part 𝐴 ↔ ≀ ∅ ErALTV 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 206 ∧ wa 395 = wceq 1540 ∅c0 4292 dom cdm 5631 / cqs 8647 ≀ ccoss 38142 EqvRel weqvrel 38159 ErALTV werALTV 38168 Disj wdisjALTV 38176 Part wpart 38181 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5246 ax-nul 5256 ax-pr 5382 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ral 3045 df-rex 3054 df-rmo 3351 df-rab 3403 df-v 3446 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-nul 4293 df-if 4485 df-sn 4586 df-pr 4588 df-op 4592 df-br 5103 df-opab 5165 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-ec 8650 df-qs 8654 df-coss 38375 df-refrel 38476 df-cnvrefrel 38491 df-symrel 38508 df-trrel 38538 df-eqvrel 38549 df-dmqs 38603 df-erALTV 38629 df-disjALTV 38670 df-part 38731 |
| This theorem is referenced by: (None) |
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