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Mirrors > Home > MPE Home > Th. List > Mathboxes > vonvolmbllem | Structured version Visualization version GIF version |
Description: If a subset 𝐵 of real numbers is Lebesgue measurable, then its corresponding 1-dimensional set is measurable w.r.t. the n-dimensional Lebesgue measure, (with 𝑛 equal to 1). (Contributed by Glauco Siliprandi, 3-Mar-2021.) |
Ref | Expression |
---|---|
vonvolmbllem.a | ⊢ (𝜑 → 𝐴 ∈ 𝑉) |
vonvolmbllem.b | ⊢ (𝜑 → 𝐵 ⊆ ℝ) |
vonvolmbllem.e | ⊢ (𝜑 → ∀𝑦 ∈ 𝒫 ℝ(vol*‘𝑦) = ((vol*‘(𝑦 ∩ 𝐵)) +𝑒 (vol*‘(𝑦 ∖ 𝐵)))) |
vonvolmbllem.x | ⊢ (𝜑 → 𝑋 ⊆ (ℝ ↑m {𝐴})) |
vonvolmbllem.y | ⊢ 𝑌 = ∪ 𝑓 ∈ 𝑋 ran 𝑓 |
Ref | Expression |
---|---|
vonvolmbllem | ⊢ (𝜑 → (((voln*‘{𝐴})‘(𝑋 ∩ (𝐵 ↑m {𝐴}))) +𝑒 ((voln*‘{𝐴})‘(𝑋 ∖ (𝐵 ↑m {𝐴})))) = ((voln*‘{𝐴})‘𝑋)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfcv 2906 | . . . . . . . 8 ⊢ Ⅎ𝑓𝑌 | |
2 | vonvolmbllem.a | . . . . . . . 8 ⊢ (𝜑 → 𝐴 ∈ 𝑉) | |
3 | vonvolmbllem.x | . . . . . . . 8 ⊢ (𝜑 → 𝑋 ⊆ (ℝ ↑m {𝐴})) | |
4 | vonvolmbllem.y | . . . . . . . 8 ⊢ 𝑌 = ∪ 𝑓 ∈ 𝑋 ran 𝑓 | |
5 | 1, 2, 3, 4 | ssmapsn 42645 | . . . . . . 7 ⊢ (𝜑 → 𝑋 = (𝑌 ↑m {𝐴})) |
6 | 5 | ineq1d 4142 | . . . . . 6 ⊢ (𝜑 → (𝑋 ∩ (𝐵 ↑m {𝐴})) = ((𝑌 ↑m {𝐴}) ∩ (𝐵 ↑m {𝐴}))) |
7 | reex 10893 | . . . . . . . . 9 ⊢ ℝ ∈ V | |
8 | 7 | a1i 11 | . . . . . . . 8 ⊢ (𝜑 → ℝ ∈ V) |
9 | 3 | sselda 3917 | . . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑓 ∈ 𝑋) → 𝑓 ∈ (ℝ ↑m {𝐴})) |
10 | elmapi 8595 | . . . . . . . . . . . . 13 ⊢ (𝑓 ∈ (ℝ ↑m {𝐴}) → 𝑓:{𝐴}⟶ℝ) | |
11 | 9, 10 | syl 17 | . . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑓 ∈ 𝑋) → 𝑓:{𝐴}⟶ℝ) |
12 | 11 | frnd 6592 | . . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑓 ∈ 𝑋) → ran 𝑓 ⊆ ℝ) |
13 | 12 | ralrimiva 3107 | . . . . . . . . . 10 ⊢ (𝜑 → ∀𝑓 ∈ 𝑋 ran 𝑓 ⊆ ℝ) |
14 | iunss 4971 | . . . . . . . . . 10 ⊢ (∪ 𝑓 ∈ 𝑋 ran 𝑓 ⊆ ℝ ↔ ∀𝑓 ∈ 𝑋 ran 𝑓 ⊆ ℝ) | |
15 | 13, 14 | sylibr 233 | . . . . . . . . 9 ⊢ (𝜑 → ∪ 𝑓 ∈ 𝑋 ran 𝑓 ⊆ ℝ) |
16 | 4, 15 | eqsstrid 3965 | . . . . . . . 8 ⊢ (𝜑 → 𝑌 ⊆ ℝ) |
17 | 8, 16 | ssexd 5243 | . . . . . . 7 ⊢ (𝜑 → 𝑌 ∈ V) |
18 | vonvolmbllem.b | . . . . . . . 8 ⊢ (𝜑 → 𝐵 ⊆ ℝ) | |
19 | 8, 18 | ssexd 5243 | . . . . . . 7 ⊢ (𝜑 → 𝐵 ∈ V) |
20 | snex 5349 | . . . . . . . 8 ⊢ {𝐴} ∈ V | |
21 | 20 | a1i 11 | . . . . . . 7 ⊢ (𝜑 → {𝐴} ∈ V) |
22 | 17, 19, 21 | inmap 42638 | . . . . . 6 ⊢ (𝜑 → ((𝑌 ↑m {𝐴}) ∩ (𝐵 ↑m {𝐴})) = ((𝑌 ∩ 𝐵) ↑m {𝐴})) |
23 | 6, 22 | eqtrd 2778 | . . . . 5 ⊢ (𝜑 → (𝑋 ∩ (𝐵 ↑m {𝐴})) = ((𝑌 ∩ 𝐵) ↑m {𝐴})) |
24 | 23 | fveq2d 6760 | . . . 4 ⊢ (𝜑 → ((voln*‘{𝐴})‘(𝑋 ∩ (𝐵 ↑m {𝐴}))) = ((voln*‘{𝐴})‘((𝑌 ∩ 𝐵) ↑m {𝐴}))) |
25 | 16 | ssinss1d 42485 | . . . . 5 ⊢ (𝜑 → (𝑌 ∩ 𝐵) ⊆ ℝ) |
26 | 2, 25 | ovnovol 44087 | . . . 4 ⊢ (𝜑 → ((voln*‘{𝐴})‘((𝑌 ∩ 𝐵) ↑m {𝐴})) = (vol*‘(𝑌 ∩ 𝐵))) |
27 | 24, 26 | eqtrd 2778 | . . 3 ⊢ (𝜑 → ((voln*‘{𝐴})‘(𝑋 ∩ (𝐵 ↑m {𝐴}))) = (vol*‘(𝑌 ∩ 𝐵))) |
28 | 5 | difeq1d 4052 | . . . . . 6 ⊢ (𝜑 → (𝑋 ∖ (𝐵 ↑m {𝐴})) = ((𝑌 ↑m {𝐴}) ∖ (𝐵 ↑m {𝐴}))) |
29 | 17, 19, 2 | difmapsn 42641 | . . . . . 6 ⊢ (𝜑 → ((𝑌 ↑m {𝐴}) ∖ (𝐵 ↑m {𝐴})) = ((𝑌 ∖ 𝐵) ↑m {𝐴})) |
30 | 28, 29 | eqtrd 2778 | . . . . 5 ⊢ (𝜑 → (𝑋 ∖ (𝐵 ↑m {𝐴})) = ((𝑌 ∖ 𝐵) ↑m {𝐴})) |
31 | 30 | fveq2d 6760 | . . . 4 ⊢ (𝜑 → ((voln*‘{𝐴})‘(𝑋 ∖ (𝐵 ↑m {𝐴}))) = ((voln*‘{𝐴})‘((𝑌 ∖ 𝐵) ↑m {𝐴}))) |
32 | 16 | ssdifssd 4073 | . . . . 5 ⊢ (𝜑 → (𝑌 ∖ 𝐵) ⊆ ℝ) |
33 | 2, 32 | ovnovol 44087 | . . . 4 ⊢ (𝜑 → ((voln*‘{𝐴})‘((𝑌 ∖ 𝐵) ↑m {𝐴})) = (vol*‘(𝑌 ∖ 𝐵))) |
34 | 31, 33 | eqtrd 2778 | . . 3 ⊢ (𝜑 → ((voln*‘{𝐴})‘(𝑋 ∖ (𝐵 ↑m {𝐴}))) = (vol*‘(𝑌 ∖ 𝐵))) |
35 | 27, 34 | oveq12d 7273 | . 2 ⊢ (𝜑 → (((voln*‘{𝐴})‘(𝑋 ∩ (𝐵 ↑m {𝐴}))) +𝑒 ((voln*‘{𝐴})‘(𝑋 ∖ (𝐵 ↑m {𝐴})))) = ((vol*‘(𝑌 ∩ 𝐵)) +𝑒 (vol*‘(𝑌 ∖ 𝐵)))) |
36 | 5 | fveq2d 6760 | . . 3 ⊢ (𝜑 → ((voln*‘{𝐴})‘𝑋) = ((voln*‘{𝐴})‘(𝑌 ↑m {𝐴}))) |
37 | 2, 16 | ovnovol 44087 | . . 3 ⊢ (𝜑 → ((voln*‘{𝐴})‘(𝑌 ↑m {𝐴})) = (vol*‘𝑌)) |
38 | 17, 16 | elpwd 4538 | . . . 4 ⊢ (𝜑 → 𝑌 ∈ 𝒫 ℝ) |
39 | vonvolmbllem.e | . . . 4 ⊢ (𝜑 → ∀𝑦 ∈ 𝒫 ℝ(vol*‘𝑦) = ((vol*‘(𝑦 ∩ 𝐵)) +𝑒 (vol*‘(𝑦 ∖ 𝐵)))) | |
40 | fveq2 6756 | . . . . . 6 ⊢ (𝑦 = 𝑌 → (vol*‘𝑦) = (vol*‘𝑌)) | |
41 | ineq1 4136 | . . . . . . . 8 ⊢ (𝑦 = 𝑌 → (𝑦 ∩ 𝐵) = (𝑌 ∩ 𝐵)) | |
42 | 41 | fveq2d 6760 | . . . . . . 7 ⊢ (𝑦 = 𝑌 → (vol*‘(𝑦 ∩ 𝐵)) = (vol*‘(𝑌 ∩ 𝐵))) |
43 | difeq1 4046 | . . . . . . . 8 ⊢ (𝑦 = 𝑌 → (𝑦 ∖ 𝐵) = (𝑌 ∖ 𝐵)) | |
44 | 43 | fveq2d 6760 | . . . . . . 7 ⊢ (𝑦 = 𝑌 → (vol*‘(𝑦 ∖ 𝐵)) = (vol*‘(𝑌 ∖ 𝐵))) |
45 | 42, 44 | oveq12d 7273 | . . . . . 6 ⊢ (𝑦 = 𝑌 → ((vol*‘(𝑦 ∩ 𝐵)) +𝑒 (vol*‘(𝑦 ∖ 𝐵))) = ((vol*‘(𝑌 ∩ 𝐵)) +𝑒 (vol*‘(𝑌 ∖ 𝐵)))) |
46 | 40, 45 | eqeq12d 2754 | . . . . 5 ⊢ (𝑦 = 𝑌 → ((vol*‘𝑦) = ((vol*‘(𝑦 ∩ 𝐵)) +𝑒 (vol*‘(𝑦 ∖ 𝐵))) ↔ (vol*‘𝑌) = ((vol*‘(𝑌 ∩ 𝐵)) +𝑒 (vol*‘(𝑌 ∖ 𝐵))))) |
47 | 46 | rspcva 3550 | . . . 4 ⊢ ((𝑌 ∈ 𝒫 ℝ ∧ ∀𝑦 ∈ 𝒫 ℝ(vol*‘𝑦) = ((vol*‘(𝑦 ∩ 𝐵)) +𝑒 (vol*‘(𝑦 ∖ 𝐵)))) → (vol*‘𝑌) = ((vol*‘(𝑌 ∩ 𝐵)) +𝑒 (vol*‘(𝑌 ∖ 𝐵)))) |
48 | 38, 39, 47 | syl2anc 583 | . . 3 ⊢ (𝜑 → (vol*‘𝑌) = ((vol*‘(𝑌 ∩ 𝐵)) +𝑒 (vol*‘(𝑌 ∖ 𝐵)))) |
49 | 36, 37, 48 | 3eqtrd 2782 | . 2 ⊢ (𝜑 → ((voln*‘{𝐴})‘𝑋) = ((vol*‘(𝑌 ∩ 𝐵)) +𝑒 (vol*‘(𝑌 ∖ 𝐵)))) |
50 | 35, 49 | eqtr4d 2781 | 1 ⊢ (𝜑 → (((voln*‘{𝐴})‘(𝑋 ∩ (𝐵 ↑m {𝐴}))) +𝑒 ((voln*‘{𝐴})‘(𝑋 ∖ (𝐵 ↑m {𝐴})))) = ((voln*‘{𝐴})‘𝑋)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1539 ∈ wcel 2108 ∀wral 3063 Vcvv 3422 ∖ cdif 3880 ∩ cin 3882 ⊆ wss 3883 𝒫 cpw 4530 {csn 4558 ∪ ciun 4921 ran crn 5581 ⟶wf 6414 ‘cfv 6418 (class class class)co 7255 ↑m cmap 8573 ℝcr 10801 +𝑒 cxad 12775 vol*covol 24531 voln*covoln 43964 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-inf2 9329 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 ax-pre-sup 10880 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-se 5536 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-isom 6427 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-of 7511 df-om 7688 df-1st 7804 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-2o 8268 df-er 8456 df-map 8575 df-pm 8576 df-ixp 8644 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-fi 9100 df-sup 9131 df-inf 9132 df-oi 9199 df-dju 9590 df-card 9628 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-div 11563 df-nn 11904 df-2 11966 df-3 11967 df-n0 12164 df-z 12250 df-uz 12512 df-q 12618 df-rp 12660 df-xneg 12777 df-xadd 12778 df-xmul 12779 df-ioo 13012 df-ico 13014 df-icc 13015 df-fz 13169 df-fzo 13312 df-fl 13440 df-seq 13650 df-exp 13711 df-hash 13973 df-cj 14738 df-re 14739 df-im 14740 df-sqrt 14874 df-abs 14875 df-clim 15125 df-rlim 15126 df-sum 15326 df-prod 15544 df-rest 17050 df-topgen 17071 df-psmet 20502 df-xmet 20503 df-met 20504 df-bl 20505 df-mopn 20506 df-top 21951 df-topon 21968 df-bases 22004 df-cmp 22446 df-ovol 24533 df-vol 24534 df-sumge0 43791 df-ovoln 43965 |
This theorem is referenced by: vonvolmbl 44089 |
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