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| Mirrors > Home > MPE Home > Th. List > Mathboxes > pet02 | 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 |
|---|---|
| pet02 | ⊢ (( Disj ∅ ∧ (dom ∅ / ∅) = 𝐴) ↔ ( EqvRel ≀ ∅ ∧ (dom ≀ ∅ / ≀ ∅) = 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | disjALTV0 38791 | . 2 ⊢ Disj ∅ | |
| 2 | 1 | petlemi 38850 | 1 ⊢ (( Disj ∅ ∧ (dom ∅ / ∅) = 𝐴) ↔ ( EqvRel ≀ ∅ ∧ (dom ≀ ∅ / ≀ ∅) = 𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 206 ∧ wa 395 = wceq 1541 ∅c0 4283 dom cdm 5616 / cqs 8621 ≀ ccoss 38214 EqvRel weqvrel 38231 Disj wdisjALTV 38248 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-sep 5234 ax-nul 5244 ax-pr 5370 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ral 3048 df-rex 3057 df-rmo 3346 df-rab 3396 df-v 3438 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4284 df-if 4476 df-sn 4577 df-pr 4579 df-op 4583 df-br 5092 df-opab 5154 df-id 5511 df-xp 5622 df-rel 5623 df-cnv 5624 df-co 5625 df-dm 5626 df-rn 5627 df-res 5628 df-ima 5629 df-ec 8624 df-qs 8628 df-coss 38447 df-refrel 38548 df-cnvrefrel 38563 df-symrel 38580 df-trrel 38610 df-eqvrel 38621 df-disjALTV 38742 |
| This theorem is referenced by: pet0 38852 |
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