Theorem eqvreldisj2 39391

Description: The elements of the quotient set of an equivalence relation are disjoint (cf. eqvreldisj3 39392). (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.

Step	Hyp	Ref	Expression
1		eqvreldisj1 39390	. 2 ⊢ ( EqvRel 𝑅 → ∀𝑥 ∈ (𝐴 / 𝑅)∀𝑦 ∈ (𝐴 / 𝑅)(𝑥 = 𝑦 ∨ (𝑥 ∩ 𝑦) = ∅))
2		dfeldisj5 39276	. 2 ⊢ ( ElDisj (𝐴 / 𝑅) ↔ ∀𝑥 ∈ (𝐴 / 𝑅)∀𝑦 ∈ (𝐴 / 𝑅)(𝑥 = 𝑦 ∨ (𝑥 ∩ 𝑦) = ∅))
3	1, 2	sylibr 236	1 ⊢ ( EqvRel 𝑅 → ElDisj (𝐴 / 𝑅))

Syntax hints:   → wi 4   ∨ wo 858   = wceq 1559  ∀wral 3075   ∩ cin 3903  ∅c0 4285   / cqs 8672   EqvRel weqvrel 38663   ElDisj weldisj 38684

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1814  ax-4 1828  ax-5 1929  ax-6 1986  ax-7 2027  ax-8 2143  ax-9 2151  ax-10 2174  ax-11 2190  ax-12 2211  ax-ext 2733  ax-sep 5245  ax-pr 5389

This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1099  df-tru 1562  df-fal 1572  df-ex 1799  df-nf 1803  df-sb 2090  df-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-ral 3076  df-rex 3086  df-rmo 3366  df-rab 3414  df-v 3455  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4480  df-sn 4582  df-pr 4584  df-op 4588  df-br 5100  df-opab 5162  df-id 5540  df-eprel 5545  df-xp 5651  df-rel 5652  df-cnv 5653  df-co 5654  df-dm 5655  df-rn 5656  df-res 5657  df-ima 5658  df-ec 8675  df-qs 8679  df-coss 38964  df-refrel 39055  df-cnvrefrel 39070  df-symrel 39087  df-trrel 39121  df-eqvrel 39132  df-disjALTV 39253  df-eldisj 39255

This theorem is referenced by:  eqvreldisj3  39392  eqvrelqseqdisj2  39395