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Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > meaiuninc | Structured version Visualization version GIF version |
Description: Measures are continuous from below (bounded case): if 𝐸 is a sequence of nondecreasing measurable sets (with bounded measure) then the measure of the union is the limit of the measures. This is Proposition 112C (e) of [Fremlin1] p. 16. (Contributed by Glauco Siliprandi, 8-Apr-2021.) |
Ref | Expression |
---|---|
meaiuninc.m | ⊢ (𝜑 → 𝑀 ∈ Meas) |
meaiuninc.n | ⊢ (𝜑 → 𝑁 ∈ ℤ) |
meaiuninc.z | ⊢ 𝑍 = (ℤ≥‘𝑁) |
meaiuninc.e | ⊢ (𝜑 → 𝐸:𝑍⟶dom 𝑀) |
meaiuninc.i | ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → (𝐸‘𝑛) ⊆ (𝐸‘(𝑛 + 1))) |
meaiuninc.x | ⊢ (𝜑 → ∃𝑥 ∈ ℝ ∀𝑛 ∈ 𝑍 (𝑀‘(𝐸‘𝑛)) ≤ 𝑥) |
meaiuninc.s | ⊢ 𝑆 = (𝑛 ∈ 𝑍 ↦ (𝑀‘(𝐸‘𝑛))) |
Ref | Expression |
---|---|
meaiuninc | ⊢ (𝜑 → 𝑆 ⇝ (𝑀‘∪ 𝑛 ∈ 𝑍 (𝐸‘𝑛))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | meaiuninc.s | . . . 4 ⊢ 𝑆 = (𝑛 ∈ 𝑍 ↦ (𝑀‘(𝐸‘𝑛))) | |
2 | 2fveq3 6890 | . . . . 5 ⊢ (𝑛 = 𝑚 → (𝑀‘(𝐸‘𝑛)) = (𝑀‘(𝐸‘𝑚))) | |
3 | 2 | cbvmptv 5254 | . . . 4 ⊢ (𝑛 ∈ 𝑍 ↦ (𝑀‘(𝐸‘𝑛))) = (𝑚 ∈ 𝑍 ↦ (𝑀‘(𝐸‘𝑚))) |
4 | 1, 3 | eqtri 2754 | . . 3 ⊢ 𝑆 = (𝑚 ∈ 𝑍 ↦ (𝑀‘(𝐸‘𝑚))) |
5 | 4 | a1i 11 | . 2 ⊢ (𝜑 → 𝑆 = (𝑚 ∈ 𝑍 ↦ (𝑀‘(𝐸‘𝑚)))) |
6 | meaiuninc.m | . . 3 ⊢ (𝜑 → 𝑀 ∈ Meas) | |
7 | meaiuninc.n | . . 3 ⊢ (𝜑 → 𝑁 ∈ ℤ) | |
8 | meaiuninc.z | . . 3 ⊢ 𝑍 = (ℤ≥‘𝑁) | |
9 | meaiuninc.e | . . 3 ⊢ (𝜑 → 𝐸:𝑍⟶dom 𝑀) | |
10 | meaiuninc.i | . . 3 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → (𝐸‘𝑛) ⊆ (𝐸‘(𝑛 + 1))) | |
11 | meaiuninc.x | . . 3 ⊢ (𝜑 → ∃𝑥 ∈ ℝ ∀𝑛 ∈ 𝑍 (𝑀‘(𝐸‘𝑛)) ≤ 𝑥) | |
12 | 4, 1 | eqtr3i 2756 | . . 3 ⊢ (𝑚 ∈ 𝑍 ↦ (𝑀‘(𝐸‘𝑚))) = (𝑛 ∈ 𝑍 ↦ (𝑀‘(𝐸‘𝑛))) |
13 | fveq2 6885 | . . . . . . 7 ⊢ (𝑘 = 𝑖 → (𝐸‘𝑘) = (𝐸‘𝑖)) | |
14 | 13 | cbviunv 5036 | . . . . . 6 ⊢ ∪ 𝑘 ∈ (𝑁..^𝑚)(𝐸‘𝑘) = ∪ 𝑖 ∈ (𝑁..^𝑚)(𝐸‘𝑖) |
15 | 14 | difeq2i 4114 | . . . . 5 ⊢ ((𝐸‘𝑚) ∖ ∪ 𝑘 ∈ (𝑁..^𝑚)(𝐸‘𝑘)) = ((𝐸‘𝑚) ∖ ∪ 𝑖 ∈ (𝑁..^𝑚)(𝐸‘𝑖)) |
16 | 15 | mpteq2i 5246 | . . . 4 ⊢ (𝑚 ∈ 𝑍 ↦ ((𝐸‘𝑚) ∖ ∪ 𝑘 ∈ (𝑁..^𝑚)(𝐸‘𝑘))) = (𝑚 ∈ 𝑍 ↦ ((𝐸‘𝑚) ∖ ∪ 𝑖 ∈ (𝑁..^𝑚)(𝐸‘𝑖))) |
17 | fveq2 6885 | . . . . . 6 ⊢ (𝑚 = 𝑛 → (𝐸‘𝑚) = (𝐸‘𝑛)) | |
18 | oveq2 7413 | . . . . . . 7 ⊢ (𝑚 = 𝑛 → (𝑁..^𝑚) = (𝑁..^𝑛)) | |
19 | 18 | iuneq1d 5017 | . . . . . 6 ⊢ (𝑚 = 𝑛 → ∪ 𝑖 ∈ (𝑁..^𝑚)(𝐸‘𝑖) = ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖)) |
20 | 17, 19 | difeq12d 4118 | . . . . 5 ⊢ (𝑚 = 𝑛 → ((𝐸‘𝑚) ∖ ∪ 𝑖 ∈ (𝑁..^𝑚)(𝐸‘𝑖)) = ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖))) |
21 | 20 | cbvmptv 5254 | . . . 4 ⊢ (𝑚 ∈ 𝑍 ↦ ((𝐸‘𝑚) ∖ ∪ 𝑖 ∈ (𝑁..^𝑚)(𝐸‘𝑖))) = (𝑛 ∈ 𝑍 ↦ ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖))) |
22 | 16, 21 | eqtri 2754 | . . 3 ⊢ (𝑚 ∈ 𝑍 ↦ ((𝐸‘𝑚) ∖ ∪ 𝑘 ∈ (𝑁..^𝑚)(𝐸‘𝑘))) = (𝑛 ∈ 𝑍 ↦ ((𝐸‘𝑛) ∖ ∪ 𝑖 ∈ (𝑁..^𝑛)(𝐸‘𝑖))) |
23 | 6, 7, 8, 9, 10, 11, 12, 22 | meaiuninclem 45768 | . 2 ⊢ (𝜑 → (𝑚 ∈ 𝑍 ↦ (𝑀‘(𝐸‘𝑚))) ⇝ (𝑀‘∪ 𝑛 ∈ 𝑍 (𝐸‘𝑛))) |
24 | 5, 23 | eqbrtrd 5163 | 1 ⊢ (𝜑 → 𝑆 ⇝ (𝑀‘∪ 𝑛 ∈ 𝑍 (𝐸‘𝑛))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1533 ∈ wcel 2098 ∀wral 3055 ∃wrex 3064 ∖ cdif 3940 ⊆ wss 3943 ∪ ciun 4990 class class class wbr 5141 ↦ cmpt 5224 dom cdm 5669 ⟶wf 6533 ‘cfv 6537 (class class class)co 7405 ℝcr 11111 1c1 11113 + caddc 11115 ≤ cle 11253 ℤcz 12562 ℤ≥cuz 12826 ..^cfzo 13633 ⇝ cli 15434 Meascmea 45737 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2697 ax-rep 5278 ax-sep 5292 ax-nul 5299 ax-pow 5356 ax-pr 5420 ax-un 7722 ax-inf2 9638 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189 ax-pre-sup 11190 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-nel 3041 df-ral 3056 df-rex 3065 df-rmo 3370 df-reu 3371 df-rab 3427 df-v 3470 df-sbc 3773 df-csb 3889 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-pss 3962 df-nul 4318 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-op 4630 df-uni 4903 df-int 4944 df-iun 4992 df-disj 5107 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-se 5625 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6294 df-ord 6361 df-on 6362 df-lim 6363 df-suc 6364 df-iota 6489 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-isom 6546 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7853 df-1st 7974 df-2nd 7975 df-frecs 8267 df-wrecs 8298 df-recs 8372 df-rdg 8411 df-1o 8467 df-oadd 8471 df-omul 8472 df-er 8705 df-map 8824 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-sup 9439 df-oi 9507 df-card 9936 df-acn 9939 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-div 11876 df-nn 12217 df-2 12279 df-3 12280 df-n0 12477 df-z 12563 df-uz 12827 df-rp 12981 df-xadd 13099 df-ico 13336 df-icc 13337 df-fz 13491 df-fzo 13634 df-seq 13973 df-exp 14033 df-hash 14296 df-cj 15052 df-re 15053 df-im 15054 df-sqrt 15188 df-abs 15189 df-clim 15438 df-sum 15639 df-salg 45597 df-sumge0 45651 df-mea 45738 |
This theorem is referenced by: meaiuninc2 45770 meaiunincf 45771 |
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