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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 38798 | . . 3 ⊢ dom ∼ 𝐴 = ∪ 𝐴 | |
| 2 | 1 | qseq1i 38547 | . 2 ⊢ (dom ∼ 𝐴 / ∼ 𝐴) = (∪ 𝐴 / ∼ 𝐴) |
| 3 | 2 | eqeq1i 2742 | 1 ⊢ ((dom ∼ 𝐴 / ∼ 𝐴) = 𝐴 ↔ (∪ 𝐴 / ∼ 𝐴) = 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 206 = wceq 1542 ∪ cuni 4865 dom cdm 5632 / cqs 8644 ∼ ccoels 38435 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5243 ax-pr 5379 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-eprel 5532 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-qs 8651 df-coss 38752 df-coels 38753 |
| This theorem is referenced by: dmqs1cosscnvepreseq 38998 dfcomember3 39010 |
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