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| Mirrors > Home > MPE Home > Th. List > Mathboxes > dfdisjs4 | Structured version Visualization version GIF version | ||
| Description: Alternate definition of the class of disjoints. (Contributed by Peter Mazsa, 5-Sep-2021.) |
| Ref | Expression |
|---|---|
| dfdisjs4 | ⊢ Disjs = {𝑟 ∈ Rels ∣ ∀𝑥∃*𝑢 𝑢𝑟𝑥} |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dfdisjs2 39074 | . 2 ⊢ Disjs = {𝑟 ∈ Rels ∣ ≀ ◡𝑟 ⊆ I } | |
| 2 | cosscnvssid4 38847 | . 2 ⊢ ( ≀ ◡𝑟 ⊆ I ↔ ∀𝑥∃*𝑢 𝑢𝑟𝑥) | |
| 3 | 1, 2 | rabbieq 3409 | 1 ⊢ Disjs = {𝑟 ∈ Rels ∣ ∀𝑥∃*𝑢 𝑢𝑟𝑥} |
| Colors of variables: wff setvar class |
| Syntax hints: ∀wal 1540 = wceq 1542 ∃*wmo 2538 {crab 3401 ⊆ wss 3903 class class class wbr 5100 I cid 5528 ◡ccnv 5633 ≀ ccoss 38463 Rels crels 38465 Disjs cdisjs 38498 |
| 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 5245 ax-pow 5314 ax-pr 5381 ax-un 7692 |
| 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-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-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-id 5529 df-xp 5640 df-rel 5641 df-cnv 5642 df-co 5643 df-dm 5644 df-rn 5645 df-res 5646 df-rels 38720 df-coss 38781 df-ssr 38858 df-cnvrefs 38885 df-cnvrefrels 38886 df-disjss 39068 df-disjs 39069 |
| This theorem is referenced by: (None) |
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