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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 38762 | . . 3 ⊢ Rel (𝑅 ⋉ 𝑆) | |
| 2 | dfdisjALTV2 39179 | . . 3 ⊢ ( Disj (𝑅 ⋉ 𝑆) ↔ ( ≀ ◡(𝑅 ⋉ 𝑆) ⊆ I ∧ Rel (𝑅 ⋉ 𝑆))) | |
| 3 | 1, 2 | mpbiran2 717 | . 2 ⊢ ( Disj (𝑅 ⋉ 𝑆) ↔ ≀ ◡(𝑅 ⋉ 𝑆) ⊆ I ) |
| 4 | 1cosscnvxrn 38945 | . . 3 ⊢ ≀ ◡(𝑅 ⋉ 𝑆) = ( ≀ ◡𝑅 ∩ ≀ ◡𝑆) | |
| 5 | 4 | sseq1i 3944 | . 2 ⊢ ( ≀ ◡(𝑅 ⋉ 𝑆) ⊆ I ↔ ( ≀ ◡𝑅 ∩ ≀ ◡𝑆) ⊆ I ) |
| 6 | 3, 5 | bitri 277 | 1 ⊢ ( Disj (𝑅 ⋉ 𝑆) ↔ ( ≀ ◡𝑅 ∩ ≀ ◡𝑆) ⊆ I ) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 208 ∩ cin 3883 ⊆ wss 3884 I cid 5514 ◡ccnv 5619 Rel wrel 5625 ⋉ cxrn 38554 ≀ ccoss 38563 Disj wdisjALTV 38599 |
| 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 5220 ax-nul 5230 ax-pr 5364 ax-un 7681 |
| 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-ne 2937 df-ral 3056 df-rex 3066 df-rab 3394 df-v 3435 df-dif 3887 df-un 3889 df-in 3891 df-ss 3901 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 6444 df-fun 6490 df-fn 6491 df-f 6492 df-fo 6494 df-fv 6496 df-1st 7933 df-2nd 7934 df-ec 8639 df-xrn 38760 df-coss 38881 df-cnvrefrel 38987 df-disjALTV 39170 |
| This theorem is referenced by: disjorimxrn 39228 |
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