Users' Mathboxes Mathbox for Peter Mazsa < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >   Mathboxes  >  dfdisjs5 Structured version   Visualization version   GIF version

Theorem dfdisjs5 36750
Description: Alternate definition of the class of disjoints. (Contributed by Peter Mazsa, 5-Sep-2021.)
Assertion
Ref Expression
dfdisjs5 Disjs = {𝑟 ∈ Rels ∣ ∀𝑢 ∈ dom 𝑟𝑣 ∈ dom 𝑟(𝑢 = 𝑣 ∨ ([𝑢]𝑟 ∩ [𝑣]𝑟) = ∅)}
Distinct variable group:   𝑢,𝑟,𝑣

Proof of Theorem dfdisjs5
StepHypRef Expression
1 dfdisjs2 36747 . 2 Disjs = {𝑟 ∈ Rels ∣ ≀ 𝑟 ⊆ I }
2 cosscnvssid5 36523 . . 3 (( ≀ 𝑟 ⊆ I ∧ Rel 𝑟) ↔ (∀𝑢 ∈ dom 𝑟𝑣 ∈ dom 𝑟(𝑢 = 𝑣 ∨ ([𝑢]𝑟 ∩ [𝑣]𝑟) = ∅) ∧ Rel 𝑟))
3 elrelsrelim 36533 . . . . 5 (𝑟 ∈ Rels → Rel 𝑟)
43biantrud 531 . . . 4 (𝑟 ∈ Rels → ( ≀ 𝑟 ⊆ I ↔ ( ≀ 𝑟 ⊆ I ∧ Rel 𝑟)))
53biantrud 531 . . . 4 (𝑟 ∈ Rels → (∀𝑢 ∈ dom 𝑟𝑣 ∈ dom 𝑟(𝑢 = 𝑣 ∨ ([𝑢]𝑟 ∩ [𝑣]𝑟) = ∅) ↔ (∀𝑢 ∈ dom 𝑟𝑣 ∈ dom 𝑟(𝑢 = 𝑣 ∨ ([𝑢]𝑟 ∩ [𝑣]𝑟) = ∅) ∧ Rel 𝑟)))
64, 5bibi12d 345 . . 3 (𝑟 ∈ Rels → (( ≀ 𝑟 ⊆ I ↔ ∀𝑢 ∈ dom 𝑟𝑣 ∈ dom 𝑟(𝑢 = 𝑣 ∨ ([𝑢]𝑟 ∩ [𝑣]𝑟) = ∅)) ↔ (( ≀ 𝑟 ⊆ I ∧ Rel 𝑟) ↔ (∀𝑢 ∈ dom 𝑟𝑣 ∈ dom 𝑟(𝑢 = 𝑣 ∨ ([𝑢]𝑟 ∩ [𝑣]𝑟) = ∅) ∧ Rel 𝑟))))
72, 6mpbiri 257 . 2 (𝑟 ∈ Rels → ( ≀ 𝑟 ⊆ I ↔ ∀𝑢 ∈ dom 𝑟𝑣 ∈ dom 𝑟(𝑢 = 𝑣 ∨ ([𝑢]𝑟 ∩ [𝑣]𝑟) = ∅)))
81, 7rabimbieq 36318 1 Disjs = {𝑟 ∈ Rels ∣ ∀𝑢 ∈ dom 𝑟𝑣 ∈ dom 𝑟(𝑢 = 𝑣 ∨ ([𝑢]𝑟 ∩ [𝑣]𝑟) = ∅)}
Colors of variables: wff setvar class
Syntax hints:  wb 205  wa 395  wo 843   = wceq 1539  wcel 2108  wral 3063  {crab 3067  cin 3882  wss 3883  c0 4253   I cid 5479  ccnv 5579  dom cdm 5580  Rel wrel 5585  [cec 8454  ccoss 36260   Rels crels 36262   Disjs cdisjs 36293
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-10 2139  ax-11 2156  ax-12 2173  ax-ext 2709  ax-sep 5218  ax-nul 5225  ax-pow 5283  ax-pr 5347  ax-un 7566
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1784  df-nf 1788  df-sb 2069  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2817  df-nfc 2888  df-ral 3068  df-rex 3069  df-rmo 3071  df-rab 3072  df-v 3424  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-nul 4254  df-if 4457  df-pw 4532  df-sn 4559  df-pr 4561  df-op 4565  df-uni 4837  df-br 5071  df-opab 5133  df-id 5480  df-xp 5586  df-rel 5587  df-cnv 5588  df-co 5589  df-dm 5590  df-rn 5591  df-res 5592  df-ima 5593  df-ec 8458  df-coss 36464  df-rels 36530  df-ssr 36543  df-cnvrefs 36568  df-cnvrefrels 36569  df-disjss 36741  df-disjs 36742
This theorem is referenced by: (None)
  Copyright terms: Public domain W3C validator