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| Mirrors > Home > MPE Home > Th. List > Mathboxes > disjxrn | Structured version Visualization version GIF version | ||
| Description: Two ways of saying that a range Cartesian product is disjoint. (Contributed by Peter Mazsa, 17-Jun-2020.) (Revised by Peter Mazsa, 21-Sep-2021.) |
| Ref | Expression |
|---|---|
| disjxrn | ⊢ ( Disj (𝑅 ⋉ 𝑆) ↔ ( ≀ ◡𝑅 ∩ ≀ ◡𝑆) ⊆ I ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xrnrel 38691 | . . 3 ⊢ Rel (𝑅 ⋉ 𝑆) | |
| 2 | dfdisjALTV2 39108 | . . 3 ⊢ ( Disj (𝑅 ⋉ 𝑆) ↔ ( ≀ ◡(𝑅 ⋉ 𝑆) ⊆ I ∧ Rel (𝑅 ⋉ 𝑆))) | |
| 3 | 1, 2 | mpbiran2 711 | . 2 ⊢ ( Disj (𝑅 ⋉ 𝑆) ↔ ≀ ◡(𝑅 ⋉ 𝑆) ⊆ I ) |
| 4 | 1cosscnvxrn 38874 | . . 3 ⊢ ≀ ◡(𝑅 ⋉ 𝑆) = ( ≀ ◡𝑅 ∩ ≀ ◡𝑆) | |
| 5 | 4 | sseq1i 3945 | . 2 ⊢ ( ≀ ◡(𝑅 ⋉ 𝑆) ⊆ I ↔ ( ≀ ◡𝑅 ∩ ≀ ◡𝑆) ⊆ I ) |
| 6 | 3, 5 | bitri 275 | 1 ⊢ ( Disj (𝑅 ⋉ 𝑆) ↔ ( ≀ ◡𝑅 ∩ ≀ ◡𝑆) ⊆ I ) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 206 ∩ cin 3884 ⊆ wss 3885 I cid 5514 ◡ccnv 5619 Rel wrel 5625 ⋉ cxrn 38483 ≀ ccoss 38492 Disj wdisjALTV 38528 |
| 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 2184 ax-ext 2707 ax-sep 5220 ax-nul 5230 ax-pr 5364 ax-un 7678 |
| 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 2538 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2810 df-nfc 2884 df-ne 2931 df-ral 3050 df-rex 3060 df-rab 3388 df-v 3429 df-dif 3888 df-un 3890 df-in 3892 df-ss 3902 df-nul 4264 df-if 4457 df-sn 4558 df-pr 4560 df-op 4564 df-uni 4841 df-br 5075 df-opab 5137 df-mpt 5156 df-id 5515 df-xp 5626 df-rel 5627 df-cnv 5628 df-co 5629 df-dm 5630 df-rn 5631 df-res 5632 df-ima 5633 df-iota 6443 df-fun 6489 df-fn 6490 df-f 6491 df-fo 6493 df-fv 6495 df-1st 7931 df-2nd 7932 df-ec 8634 df-xrn 38689 df-coss 38810 df-cnvrefrel 38916 df-disjALTV 39099 |
| This theorem is referenced by: disjorimxrn 39157 |
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