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Mirrors > Home > MPE Home > Th. List > Mathboxes > sepdisj | Structured version Visualization version GIF version |
Description: Separated sets are disjoint. Note that in general separatedness also requires 𝑇 ⊆ ∪ 𝐽 and (𝑆 ∩ ((cls‘𝐽)‘𝑇)) = ∅ as well but they are unnecessary here. (Contributed by Zhi Wang, 7-Sep-2024.) |
Ref | Expression |
---|---|
sepdisj.1 | ⊢ (𝜑 → 𝐽 ∈ Top) |
sepdisj.2 | ⊢ (𝜑 → 𝑆 ⊆ ∪ 𝐽) |
sepdisj.3 | ⊢ (𝜑 → (((cls‘𝐽)‘𝑆) ∩ 𝑇) = ∅) |
Ref | Expression |
---|---|
sepdisj | ⊢ (𝜑 → (𝑆 ∩ 𝑇) = ∅) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sepdisj.1 | . . 3 ⊢ (𝜑 → 𝐽 ∈ Top) | |
2 | sepdisj.2 | . . 3 ⊢ (𝜑 → 𝑆 ⊆ ∪ 𝐽) | |
3 | eqid 2758 | . . . 4 ⊢ ∪ 𝐽 = ∪ 𝐽 | |
4 | 3 | sscls 21769 | . . 3 ⊢ ((𝐽 ∈ Top ∧ 𝑆 ⊆ ∪ 𝐽) → 𝑆 ⊆ ((cls‘𝐽)‘𝑆)) |
5 | 1, 2, 4 | syl2anc 587 | . 2 ⊢ (𝜑 → 𝑆 ⊆ ((cls‘𝐽)‘𝑆)) |
6 | sepdisj.3 | . 2 ⊢ (𝜑 → (((cls‘𝐽)‘𝑆) ∩ 𝑇) = ∅) | |
7 | 5, 6 | ssdisjd 45627 | 1 ⊢ (𝜑 → (𝑆 ∩ 𝑇) = ∅) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1538 ∈ wcel 2111 ∩ cin 3859 ⊆ wss 3860 ∅c0 4227 ∪ cuni 4801 ‘cfv 6340 Topctop 21606 clsccl 21731 |
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 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2729 ax-rep 5160 ax-sep 5173 ax-nul 5180 ax-pow 5238 ax-pr 5302 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-fal 1551 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2557 df-eu 2588 df-clab 2736 df-cleq 2750 df-clel 2830 df-nfc 2901 df-ne 2952 df-ral 3075 df-rex 3076 df-reu 3077 df-rab 3079 df-v 3411 df-sbc 3699 df-csb 3808 df-dif 3863 df-un 3865 df-in 3867 df-ss 3877 df-nul 4228 df-if 4424 df-pw 4499 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4802 df-int 4842 df-iun 4888 df-br 5037 df-opab 5099 df-mpt 5117 df-id 5434 df-xp 5534 df-rel 5535 df-cnv 5536 df-co 5537 df-dm 5538 df-rn 5539 df-res 5540 df-ima 5541 df-iota 6299 df-fun 6342 df-fn 6343 df-f 6344 df-f1 6345 df-fo 6346 df-f1o 6347 df-fv 6348 df-top 21607 df-cld 21732 df-cls 21734 |
This theorem is referenced by: (None) |
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