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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 39646 | . 2 ⊢ Disjs = {𝑟 ∈ Rels ∣ ≀ ◡𝑟 ⊆ I } | |
| 2 | cosscnvssid4 39419 | . 2 ⊢ ( ≀ ◡𝑟 ⊆ I ↔ ∀𝑥∃*𝑢 𝑢𝑟𝑥) | |
| 3 | 1, 2 | rabbieq 3420 | 1 ⊢ Disjs = {𝑟 ∈ Rels ∣ ∀𝑥∃*𝑢 𝑢𝑟𝑥} |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∀wal 1568 = wceq 1570 ∃*wmo 2562 {crab 3412 ⊆ wss 3898 class class class wbr 5102 I cid 5541 ◡ccnv 5646 ≀ ccoss 39035 Rels crels 39037 Disjs cdisjs 39070 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5248 ax-pow 5326 ax-pr 5390 ax-un 7734 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-br 5103 df-opab 5167 df-id 5542 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-rels 39292 df-coss 39353 df-ssr 39430 df-cnvrefs 39457 df-cnvrefrels 39458 df-disjss 39640 df-disjs 39641 |
| This theorem is used by: (None) |
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