| 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 39568 | . 2 ⊢ (( Disj I ∧ (dom I / I ) = 𝐴) ↔ ( EqvRel ≀ I ∧ (dom ≀ I / ≀ I ) = 𝐴)) | |
| 2 | dfpart2 39521 | . 2 ⊢ ( I Part 𝐴 ↔ ( Disj I ∧ (dom I / I ) = 𝐴)) | |
| 3 | dferALTV2 39402 | . 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 1570 I cid 5555 dom cdm 5661 / cqs 8689 ≀ ccoss 38832 EqvRel weqvrel 38849 ErALTV werALTV 38858 Disj wdisjALTV 38868 Part wpart 38873 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5257 ax-pr 5404 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ral 3080 df-rex 3090 df-rmo 3369 df-rab 3417 df-v 3457 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4488 df-sn 4590 df-pr 4592 df-op 4596 df-br 5110 df-opab 5174 df-id 5556 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-ec 8692 df-qs 8696 df-coss 39150 df-refrel 39241 df-cnvrefrel 39256 df-symrel 39273 df-trrel 39307 df-eqvrel 39318 df-dmqs 39372 df-erALTV 39398 df-disjALTV 39439 df-part 39518 |
| This theorem is referenced by: (None) |
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