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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 38674 | . 2 ⊢ Disjs = {𝑟 ∈ Rels ∣ ≀ ◡𝑟 ⊆ I } | |
| 2 | cosscnvssid4 38441 | . 2 ⊢ ( ≀ ◡𝑟 ⊆ I ↔ ∀𝑥∃*𝑢 𝑢𝑟𝑥) | |
| 3 | 1, 2 | rabbieq 3411 | 1 ⊢ Disjs = {𝑟 ∈ Rels ∣ ∀𝑥∃*𝑢 𝑢𝑟𝑥} |
| Colors of variables: wff setvar class |
| Syntax hints: ∀wal 1538 = wceq 1540 ∃*wmo 2531 {crab 3402 ⊆ wss 3911 class class class wbr 5102 I cid 5525 ◡ccnv 5630 ≀ ccoss 38142 Rels crels 38144 Disjs cdisjs 38175 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5246 ax-nul 5256 ax-pow 5315 ax-pr 5382 ax-un 7691 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ral 3045 df-rex 3054 df-rab 3403 df-v 3446 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-nul 4293 df-if 4485 df-pw 4561 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4868 df-br 5103 df-opab 5165 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-coss 38375 df-rels 38449 df-ssr 38462 df-cnvrefs 38489 df-cnvrefrels 38490 df-disjss 38668 df-disjs 38669 |
| This theorem is referenced by: (None) |
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