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| Mirrors > Home > MPE Home > Th. List > Mathboxes > dfdisjALTV5 | Structured version Visualization version GIF version | ||
| Description: Alternate definition of the disjoint relation predicate, cf. dffunALTV5 39276. (Contributed by Peter Mazsa, 5-Sep-2021.) |
| Ref | Expression |
|---|---|
| dfdisjALTV5 | ⊢ ( Disj 𝑅 ↔ (∀𝑢 ∈ dom 𝑅∀𝑣 ∈ dom 𝑅(𝑢 = 𝑣 ∨ ([𝑢]𝑅 ∩ [𝑣]𝑅) = ∅) ∧ Rel 𝑅)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dfdisjALTV2 39299 | . 2 ⊢ ( Disj 𝑅 ↔ ( ≀ ◡𝑅 ⊆ I ∧ Rel 𝑅)) | |
| 2 | cosscnvssid5 39068 | . 2 ⊢ (( ≀ ◡𝑅 ⊆ I ∧ Rel 𝑅) ↔ (∀𝑢 ∈ dom 𝑅∀𝑣 ∈ dom 𝑅(𝑢 = 𝑣 ∨ ([𝑢]𝑅 ∩ [𝑣]𝑅) = ∅) ∧ Rel 𝑅)) | |
| 3 | 1, 2 | bitri 277 | 1 ⊢ ( Disj 𝑅 ↔ (∀𝑢 ∈ dom 𝑅∀𝑣 ∈ dom 𝑅(𝑢 = 𝑣 ∨ ([𝑢]𝑅 ∩ [𝑣]𝑅) = ∅) ∧ Rel 𝑅)) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 208 ∧ wa 399 ∨ wo 858 = wceq 1561 ∀wral 3077 ∩ cin 3904 ⊆ wss 3905 ∅c0 4286 I cid 5542 ◡ccnv 5647 dom cdm 5648 Rel wrel 5653 [cec 8677 ≀ ccoss 38683 Disj wdisjALTV 38719 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1816 ax-4 1830 ax-5 1931 ax-6 1988 ax-7 2029 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5247 ax-pr 5391 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1101 df-tru 1564 df-fal 1574 df-ex 1801 df-nf 1805 df-sb 2092 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ral 3078 df-rex 3088 df-rmo 3368 df-rab 3416 df-v 3457 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4482 df-sn 4584 df-pr 4586 df-op 4590 df-br 5102 df-opab 5164 df-id 5543 df-xp 5654 df-rel 5655 df-cnv 5656 df-co 5657 df-dm 5658 df-rn 5659 df-res 5660 df-ima 5661 df-ec 8681 df-coss 39001 df-cnvrefrel 39107 df-disjALTV 39290 |
| This theorem is referenced by: dfdisjALTV5a 39303 disjlem14 39401 |
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