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| Mirrors > Home > MPE Home > Th. List > Mathboxes > dmqscoelseq | Structured version Visualization version GIF version | ||
| 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.) |
| Ref | Expression |
|---|---|
| dmqscoelseq | ⊢ ((dom ∼ 𝐴 / ∼ 𝐴) = 𝐴 ↔ (∪ 𝐴 / ∼ 𝐴) = 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dmcoels 38914 | . . 3 ⊢ dom ∼ 𝐴 = ∪ 𝐴 | |
| 2 | 1 | qseq1i 38663 | . 2 ⊢ (dom ∼ 𝐴 / ∼ 𝐴) = (∪ 𝐴 / ∼ 𝐴) |
| 3 | 2 | eqeq1i 2744 | 1 ⊢ ((dom ∼ 𝐴 / ∼ 𝐴) = 𝐴 ↔ (∪ 𝐴 / ∼ 𝐴) = 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 207 = wceq 1547 ∪ cuni 4838 dom cdm 5618 / cqs 8632 ∼ ccoels 38551 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-sep 5218 ax-pr 5362 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4262 df-if 4455 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-br 5073 df-opab 5135 df-eprel 5518 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 df-res 5630 df-qs 8639 df-coss 38868 df-coels 38869 |
| This theorem is referenced by: dmqs1cosscnvepreseq 39114 dfcomember3 39126 |
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