| Mathbox for Peter Mazsa |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > petid | Structured version Visualization version GIF version | ||
| Description: A class is a partition by the identity class if and only if the cosets by the identity class are in equivalence relation on it. (Contributed by Peter Mazsa, 31-Dec-2021.) |
| Ref | Expression |
|---|---|
| petid | ⊢ ( I Part 𝐴 ↔ ≀ I ErALTV 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | petid2 39457 | . 2 ⊢ (( Disj I ∧ (dom I / I ) = 𝐴) ↔ ( EqvRel ≀ I ∧ (dom ≀ I / ≀ I ) = 𝐴)) | |
| 2 | dfpart2 39410 | . 2 ⊢ ( I Part 𝐴 ↔ ( Disj I ∧ (dom I / I ) = 𝐴)) | |
| 3 | dferALTV2 39291 | . 2 ⊢ ( ≀ I ErALTV 𝐴 ↔ ( EqvRel ≀ I ∧ (dom ≀ I / ≀ I ) = 𝐴)) | |
| 4 | 1, 2, 3 | 3bitr4i 306 | 1 ⊢ ( I Part 𝐴 ↔ ≀ I ErALTV 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 209 ∧ wa 400 = wceq 1567 I cid 5556 dom cdm 5662 / cqs 8692 ≀ ccoss 38721 EqvRel weqvrel 38738 ErALTV werALTV 38747 Disj wdisjALTV 38757 Part wpart 38762 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5261 ax-pr 5405 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ral 3086 df-rex 3096 df-rmo 3376 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-br 5114 df-opab 5178 df-id 5557 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-ec 8695 df-qs 8699 df-coss 39039 df-refrel 39130 df-cnvrefrel 39145 df-symrel 39162 df-trrel 39196 df-eqvrel 39207 df-dmqs 39261 df-erALTV 39287 df-disjALTV 39328 df-part 39407 |
| This theorem is referenced by: (None) |
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