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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 38694 | . . 3 ⊢ Rel (𝑅 ⋉ 𝑆) | |
| 2 | dfdisjALTV2 39111 | . . 3 ⊢ ( Disj (𝑅 ⋉ 𝑆) ↔ ( ≀ ◡(𝑅 ⋉ 𝑆) ⊆ I ∧ Rel (𝑅 ⋉ 𝑆))) | |
| 3 | 1, 2 | mpbiran2 711 | . 2 ⊢ ( Disj (𝑅 ⋉ 𝑆) ↔ ≀ ◡(𝑅 ⋉ 𝑆) ⊆ I ) |
| 4 | 1cosscnvxrn 38877 | . . 3 ⊢ ≀ ◡(𝑅 ⋉ 𝑆) = ( ≀ ◡𝑅 ∩ ≀ ◡𝑆) | |
| 5 | 4 | sseq1i 3951 | . 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 3889 ⊆ wss 3890 I cid 5516 ◡ccnv 5621 Rel wrel 5627 ⋉ cxrn 38486 ≀ ccoss 38495 Disj wdisjALTV 38531 |
| 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 2185 ax-ext 2709 ax-sep 5231 ax-nul 5241 ax-pr 5368 ax-un 7680 |
| 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 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5517 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-fo 6496 df-fv 6498 df-1st 7933 df-2nd 7934 df-ec 8636 df-xrn 38692 df-coss 38813 df-cnvrefrel 38919 df-disjALTV 39102 |
| This theorem is referenced by: disjorimxrn 39160 |
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