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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 39176 | . 2 ⊢ Disjs = {𝑟 ∈ Rels ∣ ≀ ◡𝑟 ⊆ I } | |
| 2 | cosscnvssid4 38949 | . 2 ⊢ ( ≀ ◡𝑟 ⊆ I ↔ ∀𝑥∃*𝑢 𝑢𝑟𝑥) | |
| 3 | 1, 2 | rabbieq 3401 | 1 ⊢ Disjs = {𝑟 ∈ Rels ∣ ∀𝑥∃*𝑢 𝑢𝑟𝑥} |
| Colors of variables: wff setvar class |
| Syntax hints: ∀wal 1546 = wceq 1548 ∃*wmo 2543 {crab 3393 ⊆ wss 3885 class class class wbr 5075 I cid 5515 ◡ccnv 5620 ≀ ccoss 38565 Rels crels 38567 Disjs cdisjs 38600 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1975 ax-7 2016 ax-8 2123 ax-9 2131 ax-10 2154 ax-11 2170 ax-12 2191 ax-ext 2713 ax-sep 5221 ax-pow 5297 ax-pr 5365 ax-un 7682 |
| This theorem depends on definitions: df-bi 209 df-an 398 df-or 855 df-3an 1095 df-tru 1551 df-fal 1561 df-ex 1788 df-nf 1792 df-sb 2075 df-mo 2545 df-eu 2575 df-clab 2720 df-cleq 2733 df-clel 2816 df-nfc 2890 df-ral 3056 df-rex 3066 df-rab 3394 df-v 3435 df-dif 3888 df-un 3890 df-in 3892 df-ss 3902 df-nul 4265 df-if 4458 df-pw 4534 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4842 df-br 5076 df-opab 5138 df-id 5516 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-rels 38822 df-coss 38883 df-ssr 38960 df-cnvrefs 38987 df-cnvrefrels 38988 df-disjss 39170 df-disjs 39171 |
| This theorem is referenced by: (None) |
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