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Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > saliincl | Structured version Visualization version GIF version |
Description: SAlg sigma-algebra is closed under countable indexed intersection. (Contributed by Glauco Siliprandi, 17-Aug-2020.) |
Ref | Expression |
---|---|
saliincl.s | ⊢ (𝜑 → 𝑆 ∈ SAlg) |
saliincl.kct | ⊢ (𝜑 → 𝐾 ≼ ω) |
saliincl.kn0 | ⊢ (𝜑 → 𝐾 ≠ ∅) |
saliincl.e | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐾) → 𝐸 ∈ 𝑆) |
Ref | Expression |
---|---|
saliincl | ⊢ (𝜑 → ∩ 𝑘 ∈ 𝐾 𝐸 ∈ 𝑆) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | saliincl.e | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐾) → 𝐸 ∈ 𝑆) | |
2 | elssuni 4830 | . . . . . . . 8 ⊢ (𝐸 ∈ 𝑆 → 𝐸 ⊆ ∪ 𝑆) | |
3 | 1, 2 | syl 17 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐾) → 𝐸 ⊆ ∪ 𝑆) |
4 | df-ss 3898 | . . . . . . 7 ⊢ (𝐸 ⊆ ∪ 𝑆 ↔ (𝐸 ∩ ∪ 𝑆) = 𝐸) | |
5 | 3, 4 | sylib 221 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐾) → (𝐸 ∩ ∪ 𝑆) = 𝐸) |
6 | 5 | eqcomd 2804 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐾) → 𝐸 = (𝐸 ∩ ∪ 𝑆)) |
7 | incom 4128 | . . . . . 6 ⊢ (𝐸 ∩ ∪ 𝑆) = (∪ 𝑆 ∩ 𝐸) | |
8 | 7 | a1i 11 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐾) → (𝐸 ∩ ∪ 𝑆) = (∪ 𝑆 ∩ 𝐸)) |
9 | dfin4 4194 | . . . . . 6 ⊢ (∪ 𝑆 ∩ 𝐸) = (∪ 𝑆 ∖ (∪ 𝑆 ∖ 𝐸)) | |
10 | 9 | a1i 11 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐾) → (∪ 𝑆 ∩ 𝐸) = (∪ 𝑆 ∖ (∪ 𝑆 ∖ 𝐸))) |
11 | 6, 8, 10 | 3eqtrd 2837 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐾) → 𝐸 = (∪ 𝑆 ∖ (∪ 𝑆 ∖ 𝐸))) |
12 | 11 | iineq2dv 4906 | . . 3 ⊢ (𝜑 → ∩ 𝑘 ∈ 𝐾 𝐸 = ∩ 𝑘 ∈ 𝐾 (∪ 𝑆 ∖ (∪ 𝑆 ∖ 𝐸))) |
13 | saliincl.kn0 | . . . 4 ⊢ (𝜑 → 𝐾 ≠ ∅) | |
14 | iindif2 4962 | . . . 4 ⊢ (𝐾 ≠ ∅ → ∩ 𝑘 ∈ 𝐾 (∪ 𝑆 ∖ (∪ 𝑆 ∖ 𝐸)) = (∪ 𝑆 ∖ ∪ 𝑘 ∈ 𝐾 (∪ 𝑆 ∖ 𝐸))) | |
15 | 13, 14 | syl 17 | . . 3 ⊢ (𝜑 → ∩ 𝑘 ∈ 𝐾 (∪ 𝑆 ∖ (∪ 𝑆 ∖ 𝐸)) = (∪ 𝑆 ∖ ∪ 𝑘 ∈ 𝐾 (∪ 𝑆 ∖ 𝐸))) |
16 | 12, 15 | eqtrd 2833 | . 2 ⊢ (𝜑 → ∩ 𝑘 ∈ 𝐾 𝐸 = (∪ 𝑆 ∖ ∪ 𝑘 ∈ 𝐾 (∪ 𝑆 ∖ 𝐸))) |
17 | saliincl.s | . . 3 ⊢ (𝜑 → 𝑆 ∈ SAlg) | |
18 | saliincl.kct | . . . 4 ⊢ (𝜑 → 𝐾 ≼ ω) | |
19 | 17 | adantr 484 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐾) → 𝑆 ∈ SAlg) |
20 | saldifcl 42961 | . . . . 5 ⊢ ((𝑆 ∈ SAlg ∧ 𝐸 ∈ 𝑆) → (∪ 𝑆 ∖ 𝐸) ∈ 𝑆) | |
21 | 19, 1, 20 | syl2anc 587 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐾) → (∪ 𝑆 ∖ 𝐸) ∈ 𝑆) |
22 | 17, 18, 21 | saliuncl 42964 | . . 3 ⊢ (𝜑 → ∪ 𝑘 ∈ 𝐾 (∪ 𝑆 ∖ 𝐸) ∈ 𝑆) |
23 | saldifcl 42961 | . . 3 ⊢ ((𝑆 ∈ SAlg ∧ ∪ 𝑘 ∈ 𝐾 (∪ 𝑆 ∖ 𝐸) ∈ 𝑆) → (∪ 𝑆 ∖ ∪ 𝑘 ∈ 𝐾 (∪ 𝑆 ∖ 𝐸)) ∈ 𝑆) | |
24 | 17, 22, 23 | syl2anc 587 | . 2 ⊢ (𝜑 → (∪ 𝑆 ∖ ∪ 𝑘 ∈ 𝐾 (∪ 𝑆 ∖ 𝐸)) ∈ 𝑆) |
25 | 16, 24 | eqeltrd 2890 | 1 ⊢ (𝜑 → ∩ 𝑘 ∈ 𝐾 𝐸 ∈ 𝑆) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 = wceq 1538 ∈ wcel 2111 ≠ wne 2987 ∖ cdif 3878 ∩ cin 3880 ⊆ wss 3881 ∅c0 4243 ∪ cuni 4800 ∪ ciun 4881 ∩ ciin 4882 class class class wbr 5030 ωcom 7560 ≼ cdom 8490 SAlgcsalg 42950 |
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 2770 ax-rep 5154 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 ax-un 7441 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3or 1085 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ne 2988 df-ral 3111 df-rex 3112 df-reu 3113 df-rmo 3114 df-rab 3115 df-v 3443 df-sbc 3721 df-csb 3829 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-pss 3900 df-nul 4244 df-if 4426 df-pw 4499 df-sn 4526 df-pr 4528 df-tp 4530 df-op 4532 df-uni 4801 df-int 4839 df-iun 4883 df-iin 4884 df-br 5031 df-opab 5093 df-mpt 5111 df-tr 5137 df-id 5425 df-eprel 5430 df-po 5438 df-so 5439 df-fr 5478 df-se 5479 df-we 5480 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-pred 6116 df-ord 6162 df-on 6163 df-lim 6164 df-suc 6165 df-iota 6283 df-fun 6326 df-fn 6327 df-f 6328 df-f1 6329 df-fo 6330 df-f1o 6331 df-fv 6332 df-isom 6333 df-riota 7093 df-ov 7138 df-oprab 7139 df-mpo 7140 df-om 7561 df-1st 7671 df-2nd 7672 df-wrecs 7930 df-recs 7991 df-er 8272 df-map 8391 df-en 8493 df-dom 8494 df-card 9352 df-acn 9355 df-salg 42951 |
This theorem is referenced by: iocborel 42996 hoimbllem 43269 iccvonmbllem 43317 salpreimagtge 43359 salpreimaltle 43360 smflimlem1 43404 smfsuplem1 43442 |
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