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Theorem disjdmqs 39589
Description: If a relation is disjoint, its domain quotient is equal to the domain quotient of the cosets by it. Lemma for partim2 39592 and petlem 39597 via disjdmqseq 39590. (Contributed by Peter Mazsa, 16-Sep-2021.)
Assertion
Ref Expression
disjdmqs ( Disj 𝑅 → (dom 𝑅 / 𝑅) = (dom ≀ 𝑅 /𝑅))

Proof of Theorem disjdmqs
StepHypRef Expression
1 disjdmqsss 39587 . 2 ( Disj 𝑅 → (dom 𝑅 / 𝑅) ⊆ (dom ≀ 𝑅 /𝑅))
2 disjdmqscossss 39588 . 2 ( Disj 𝑅 → (dom ≀ 𝑅 /𝑅) ⊆ (dom 𝑅 / 𝑅))
31, 2eqssd 3957 1 ( Disj 𝑅 → (dom 𝑅 / 𝑅) = (dom ≀ 𝑅 /𝑅))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4   = wceq 1570  dom cdm 5666   / cqs 8702  ccoss 38865   Disj wdisjALTV 38901
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2148  ax-9 2156  ax-10 2179  ax-11 2195  ax-12 2216  ax-ext 2738  ax-sep 5262  ax-pr 5409
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2570  df-eu 2600  df-clab 2745  df-cleq 2758  df-clel 2841  df-nfc 2915  df-ral 3083  df-rex 3093  df-rmo 3372  df-rab 3420  df-v 3460  df-dif 3911  df-un 3913  df-in 3915  df-ss 3925  df-nul 4290  df-if 4493  df-sn 4595  df-pr 4597  df-op 4601  df-br 5115  df-opab 5179  df-id 5561  df-xp 5672  df-rel 5673  df-cnv 5674  df-co 5675  df-dm 5676  df-rn 5677  df-res 5678  df-ima 5679  df-ec 8705  df-qs 8709  df-coss 39183  df-cnvrefrel 39289  df-disjALTV 39472
This theorem is used by:  disjdmqseq  39590  disjimeldisjdmqs  39615
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