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Mirrors > Home > MPE Home > Th. List > Mathboxes > dya2iocbrsiga | Structured version Visualization version GIF version |
Description: Dyadic intervals are Borel sets of ℝ. (Contributed by Thierry Arnoux, 22-Sep-2017.) |
Ref | Expression |
---|---|
sxbrsiga.0 | ⊢ 𝐽 = (topGen‘ran (,)) |
dya2ioc.1 | ⊢ 𝐼 = (𝑥 ∈ ℤ, 𝑛 ∈ ℤ ↦ ((𝑥 / (2↑𝑛))[,)((𝑥 + 1) / (2↑𝑛)))) |
Ref | Expression |
---|---|
dya2iocbrsiga | ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → (𝑋𝐼𝑁) ∈ 𝔅ℝ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sxbrsiga.0 | . . 3 ⊢ 𝐽 = (topGen‘ran (,)) | |
2 | dya2ioc.1 | . . 3 ⊢ 𝐼 = (𝑥 ∈ ℤ, 𝑛 ∈ ℤ ↦ ((𝑥 / (2↑𝑛))[,)((𝑥 + 1) / (2↑𝑛)))) | |
3 | 1, 2 | dya2iocival 32140 | . 2 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → (𝑋𝐼𝑁) = ((𝑋 / (2↑𝑁))[,)((𝑋 + 1) / (2↑𝑁)))) |
4 | mnfxr 10963 | . . . . 5 ⊢ -∞ ∈ ℝ* | |
5 | 4 | a1i 11 | . . . 4 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → -∞ ∈ ℝ*) |
6 | simpr 484 | . . . . . . 7 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → 𝑋 ∈ ℤ) | |
7 | 6 | zred 12355 | . . . . . 6 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → 𝑋 ∈ ℝ) |
8 | 2rp 12664 | . . . . . . . 8 ⊢ 2 ∈ ℝ+ | |
9 | 8 | a1i 11 | . . . . . . 7 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → 2 ∈ ℝ+) |
10 | simpl 482 | . . . . . . 7 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → 𝑁 ∈ ℤ) | |
11 | 9, 10 | rpexpcld 13890 | . . . . . 6 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → (2↑𝑁) ∈ ℝ+) |
12 | 7, 11 | rerpdivcld 12732 | . . . . 5 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → (𝑋 / (2↑𝑁)) ∈ ℝ) |
13 | 12 | rexrd 10956 | . . . 4 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → (𝑋 / (2↑𝑁)) ∈ ℝ*) |
14 | 1red 10907 | . . . . . . 7 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → 1 ∈ ℝ) | |
15 | 7, 14 | readdcld 10935 | . . . . . 6 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → (𝑋 + 1) ∈ ℝ) |
16 | 15, 11 | rerpdivcld 12732 | . . . . 5 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → ((𝑋 + 1) / (2↑𝑁)) ∈ ℝ) |
17 | 16 | rexrd 10956 | . . . 4 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → ((𝑋 + 1) / (2↑𝑁)) ∈ ℝ*) |
18 | mnflt 12788 | . . . . 5 ⊢ ((𝑋 / (2↑𝑁)) ∈ ℝ → -∞ < (𝑋 / (2↑𝑁))) | |
19 | 12, 18 | syl 17 | . . . 4 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → -∞ < (𝑋 / (2↑𝑁))) |
20 | difioo 31005 | . . . 4 ⊢ (((-∞ ∈ ℝ* ∧ (𝑋 / (2↑𝑁)) ∈ ℝ* ∧ ((𝑋 + 1) / (2↑𝑁)) ∈ ℝ*) ∧ -∞ < (𝑋 / (2↑𝑁))) → ((-∞(,)((𝑋 + 1) / (2↑𝑁))) ∖ (-∞(,)(𝑋 / (2↑𝑁)))) = ((𝑋 / (2↑𝑁))[,)((𝑋 + 1) / (2↑𝑁)))) | |
21 | 5, 13, 17, 19, 20 | syl31anc 1371 | . . 3 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → ((-∞(,)((𝑋 + 1) / (2↑𝑁))) ∖ (-∞(,)(𝑋 / (2↑𝑁)))) = ((𝑋 / (2↑𝑁))[,)((𝑋 + 1) / (2↑𝑁)))) |
22 | brsigarn 32052 | . . . . 5 ⊢ 𝔅ℝ ∈ (sigAlgebra‘ℝ) | |
23 | elrnsiga 31994 | . . . . 5 ⊢ (𝔅ℝ ∈ (sigAlgebra‘ℝ) → 𝔅ℝ ∈ ∪ ran sigAlgebra) | |
24 | 22, 23 | ax-mp 5 | . . . 4 ⊢ 𝔅ℝ ∈ ∪ ran sigAlgebra |
25 | retop 23831 | . . . . . 6 ⊢ (topGen‘ran (,)) ∈ Top | |
26 | iooretop 23835 | . . . . . 6 ⊢ (-∞(,)((𝑋 + 1) / (2↑𝑁))) ∈ (topGen‘ran (,)) | |
27 | elsigagen 32015 | . . . . . 6 ⊢ (((topGen‘ran (,)) ∈ Top ∧ (-∞(,)((𝑋 + 1) / (2↑𝑁))) ∈ (topGen‘ran (,))) → (-∞(,)((𝑋 + 1) / (2↑𝑁))) ∈ (sigaGen‘(topGen‘ran (,)))) | |
28 | 25, 26, 27 | mp2an 688 | . . . . 5 ⊢ (-∞(,)((𝑋 + 1) / (2↑𝑁))) ∈ (sigaGen‘(topGen‘ran (,))) |
29 | df-brsiga 32050 | . . . . 5 ⊢ 𝔅ℝ = (sigaGen‘(topGen‘ran (,))) | |
30 | 28, 29 | eleqtrri 2838 | . . . 4 ⊢ (-∞(,)((𝑋 + 1) / (2↑𝑁))) ∈ 𝔅ℝ |
31 | iooretop 23835 | . . . . . 6 ⊢ (-∞(,)(𝑋 / (2↑𝑁))) ∈ (topGen‘ran (,)) | |
32 | elsigagen 32015 | . . . . . 6 ⊢ (((topGen‘ran (,)) ∈ Top ∧ (-∞(,)(𝑋 / (2↑𝑁))) ∈ (topGen‘ran (,))) → (-∞(,)(𝑋 / (2↑𝑁))) ∈ (sigaGen‘(topGen‘ran (,)))) | |
33 | 25, 31, 32 | mp2an 688 | . . . . 5 ⊢ (-∞(,)(𝑋 / (2↑𝑁))) ∈ (sigaGen‘(topGen‘ran (,))) |
34 | 33, 29 | eleqtrri 2838 | . . . 4 ⊢ (-∞(,)(𝑋 / (2↑𝑁))) ∈ 𝔅ℝ |
35 | difelsiga 32001 | . . . 4 ⊢ ((𝔅ℝ ∈ ∪ ran sigAlgebra ∧ (-∞(,)((𝑋 + 1) / (2↑𝑁))) ∈ 𝔅ℝ ∧ (-∞(,)(𝑋 / (2↑𝑁))) ∈ 𝔅ℝ) → ((-∞(,)((𝑋 + 1) / (2↑𝑁))) ∖ (-∞(,)(𝑋 / (2↑𝑁)))) ∈ 𝔅ℝ) | |
36 | 24, 30, 34, 35 | mp3an 1459 | . . 3 ⊢ ((-∞(,)((𝑋 + 1) / (2↑𝑁))) ∖ (-∞(,)(𝑋 / (2↑𝑁)))) ∈ 𝔅ℝ |
37 | 21, 36 | eqeltrrdi 2848 | . 2 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → ((𝑋 / (2↑𝑁))[,)((𝑋 + 1) / (2↑𝑁))) ∈ 𝔅ℝ) |
38 | 3, 37 | eqeltrd 2839 | 1 ⊢ ((𝑁 ∈ ℤ ∧ 𝑋 ∈ ℤ) → (𝑋𝐼𝑁) ∈ 𝔅ℝ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1539 ∈ wcel 2108 ∖ cdif 3880 ∪ cuni 4836 class class class wbr 5070 ran crn 5581 ‘cfv 6418 (class class class)co 7255 ∈ cmpo 7257 ℝcr 10801 1c1 10803 + caddc 10805 -∞cmnf 10938 ℝ*cxr 10939 < clt 10940 / cdiv 11562 2c2 11958 ℤcz 12249 ℝ+crp 12659 (,)cioo 13008 [,)cico 13010 ↑cexp 13710 topGenctg 17065 Topctop 21950 sigAlgebracsiga 31976 sigaGencsigagen 32006 𝔅ℝcbrsiga 32049 |
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-ac2 10150 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-iin 4924 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-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-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-sup 9131 df-inf 9132 df-oi 9199 df-dju 9590 df-card 9628 df-acn 9631 df-ac 9803 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-n0 12164 df-z 12250 df-uz 12512 df-q 12618 df-rp 12660 df-ioo 13012 df-ico 13014 df-seq 13650 df-exp 13711 df-topgen 17071 df-top 21951 df-bases 22004 df-siga 31977 df-sigagen 32007 df-brsiga 32050 |
This theorem is referenced by: (None) |
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