| Mathbox for Peter Mazsa |
< Previous
Next >
Nearby theorems |
||
| 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 39988 | . 2 ⊢ (( Disj I ∧ (dom I / I ) = 𝐴) ↔ ( EqvRel ≀ I ∧ (dom ≀ I / ≀ I ) = 𝐴)) | |
| 2 | dfpart2 39941 | . 2 ⊢ ( I Part 𝐴 ↔ ( Disj I ∧ (dom I / I ) = 𝐴)) | |
| 3 | dferALTV2 39822 | . 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 |
| This proof depends on syntax axioms: ↔ wb 209 ∧ wa 401 = wceq 1569 I cid 5545 dom cdm 5651 / cqs 8724 ≀ ccoss 39252 EqvRel weqvrel 39269 ErALTV werALTV 39278 Disj wdisjALTV 39288 Part wpart 39293 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-pr 5391 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ral 3077 df-rex 3087 df-rmo 3365 df-rab 3413 df-v 3452 df-ss 3897 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-br 5103 df-opab 5167 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-ec 8727 df-qs 8731 df-coss 39570 df-refrel 39661 df-cnvrefrel 39676 df-symrel 39693 df-trrel 39727 df-eqvrel 39738 df-dmqs 39792 df-erALTV 39818 df-disjALTV 39859 df-part 39938 |
| This theorem is used by: (None) |
| Copyright terms: Public domain | W3C validator |