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Theorem dmqscoelseq 38832
Description: Two ways to express the equality of the domain quotient of the coelements on the class 𝐴 with the class 𝐴. (Contributed by Peter Mazsa, 26-Sep-2021.)
Assertion
Ref Expression
dmqscoelseq ((dom ∼ 𝐴 /𝐴) = 𝐴 ↔ ( 𝐴 /𝐴) = 𝐴)

Proof of Theorem dmqscoelseq
StepHypRef Expression
1 dmcoels 38632 . . 3 dom ∼ 𝐴 = 𝐴
21qseq1i 38401 . 2 (dom ∼ 𝐴 /𝐴) = ( 𝐴 /𝐴)
32eqeq1i 2738 1 ((dom ∼ 𝐴 /𝐴) = 𝐴 ↔ ( 𝐴 /𝐴) = 𝐴)
Colors of variables: wff setvar class
Syntax hints:  wb 206   = wceq 1541   cuni 4860  dom cdm 5621   / cqs 8630  ccoels 38296
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 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2182  ax-ext 2705  ax-sep 5238  ax-nul 5248  ax-pr 5374
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 2537  df-eu 2566  df-clab 2712  df-cleq 2725  df-clel 2808  df-nfc 2882  df-ne 2930  df-ral 3049  df-rex 3058  df-rab 3397  df-v 3439  df-dif 3901  df-un 3903  df-in 3905  df-ss 3915  df-nul 4283  df-if 4477  df-sn 4578  df-pr 4580  df-op 4584  df-uni 4861  df-br 5096  df-opab 5158  df-eprel 5521  df-xp 5627  df-rel 5628  df-cnv 5629  df-co 5630  df-dm 5631  df-rn 5632  df-res 5633  df-qs 8637  df-coss 38586  df-coels 38587
This theorem is referenced by:  dmqs1cosscnvepreseq  38833  dfcomember3  38845
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