Users' Mathboxes Mathbox for Peter Mazsa < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >   Mathboxes  >  eqvreldisj2 Structured version   Visualization version   GIF version

Theorem eqvreldisj2 37045
Description: The elements of the quotient set of an equivalence relation are disjoint (cf. eqvreldisj3 37046). (Contributed by Mario Carneiro, 10-Dec-2016.) (Revised by Peter Mazsa, 19-Sep-2021.)
Assertion
Ref Expression
eqvreldisj2 ( EqvRel 𝑅 → ElDisj (𝐴 / 𝑅))

Proof of Theorem eqvreldisj2
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 eqvreldisj1 37044 . 2 ( EqvRel 𝑅 → ∀𝑥 ∈ (𝐴 / 𝑅)∀𝑦 ∈ (𝐴 / 𝑅)(𝑥 = 𝑦 ∨ (𝑥𝑦) = ∅))
2 dfeldisj5 36941 . 2 ( ElDisj (𝐴 / 𝑅) ↔ ∀𝑥 ∈ (𝐴 / 𝑅)∀𝑦 ∈ (𝐴 / 𝑅)(𝑥 = 𝑦 ∨ (𝑥𝑦) = ∅))
31, 2sylibr 233 1 ( EqvRel 𝑅 → ElDisj (𝐴 / 𝑅))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wo 845   = wceq 1539  wral 3061  cin 3891  c0 4262   / cqs 8528   EqvRel weqvrel 36404   ElDisj weldisj 36423
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1911  ax-6 1969  ax-7 2009  ax-8 2106  ax-9 2114  ax-10 2135  ax-11 2152  ax-12 2169  ax-ext 2707  ax-sep 5232  ax-nul 5239  ax-pr 5361
This theorem depends on definitions:  df-bi 206  df-an 398  df-or 846  df-3an 1089  df-tru 1542  df-fal 1552  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2538  df-eu 2567  df-clab 2714  df-cleq 2728  df-clel 2814  df-nfc 2886  df-ne 2941  df-ral 3062  df-rex 3071  df-rmo 3339  df-rab 3341  df-v 3439  df-dif 3895  df-un 3897  df-in 3899  df-ss 3909  df-nul 4263  df-if 4466  df-sn 4566  df-pr 4568  df-op 4572  df-br 5082  df-opab 5144  df-id 5500  df-eprel 5506  df-xp 5606  df-rel 5607  df-cnv 5608  df-co 5609  df-dm 5610  df-rn 5611  df-res 5612  df-ima 5613  df-ec 8531  df-qs 8535  df-coss 36631  df-refrel 36732  df-cnvrefrel 36747  df-symrel 36764  df-trrel 36794  df-eqvrel 36805  df-disjALTV 36925  df-eldisj 36927
This theorem is referenced by:  eqvreldisj3  37046  eqvrelqseqdisj2  37049
  Copyright terms: Public domain W3C validator