Mathbox for Thierry Arnoux |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > sxbrsigalem1 | Structured version Visualization version GIF version |
Description: The Borel algebra on (ℝ × ℝ) is a subset of the sigma-algebra generated by the dyadic closed-below, open-above rectangular subsets of (ℝ × ℝ). This is a step of the proof of Proposition 1.1.5 of [Cohn] p. 4. (Contributed by Thierry Arnoux, 17-Sep-2017.) |
Ref | Expression |
---|---|
sxbrsiga.0 | ⊢ 𝐽 = (topGen‘ran (,)) |
dya2ioc.1 | ⊢ 𝐼 = (𝑥 ∈ ℤ, 𝑛 ∈ ℤ ↦ ((𝑥 / (2↑𝑛))[,)((𝑥 + 1) / (2↑𝑛)))) |
dya2ioc.2 | ⊢ 𝑅 = (𝑢 ∈ ran 𝐼, 𝑣 ∈ ran 𝐼 ↦ (𝑢 × 𝑣)) |
Ref | Expression |
---|---|
sxbrsigalem1 | ⊢ (sigaGen‘(𝐽 ×t 𝐽)) ⊆ (sigaGen‘ran 𝑅) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sxbrsiga.0 | . . . 4 ⊢ 𝐽 = (topGen‘ran (,)) | |
2 | dya2ioc.1 | . . . 4 ⊢ 𝐼 = (𝑥 ∈ ℤ, 𝑛 ∈ ℤ ↦ ((𝑥 / (2↑𝑛))[,)((𝑥 + 1) / (2↑𝑛)))) | |
3 | dya2ioc.2 | . . . 4 ⊢ 𝑅 = (𝑢 ∈ ran 𝐼, 𝑣 ∈ ran 𝐼 ↦ (𝑢 × 𝑣)) | |
4 | 1, 2, 3 | dya2iocucvr 30346 | . . 3 ⊢ ∪ ran 𝑅 = (ℝ × ℝ) |
5 | retop 22565 | . . . . 5 ⊢ (topGen‘ran (,)) ∈ Top | |
6 | 1, 5 | eqeltri 2697 | . . . 4 ⊢ 𝐽 ∈ Top |
7 | uniretop 22566 | . . . . 5 ⊢ ℝ = ∪ (topGen‘ran (,)) | |
8 | 1 | unieqi 4445 | . . . . 5 ⊢ ∪ 𝐽 = ∪ (topGen‘ran (,)) |
9 | 7, 8 | eqtr4i 2647 | . . . 4 ⊢ ℝ = ∪ 𝐽 |
10 | 6, 6, 9, 9 | txunii 21396 | . . 3 ⊢ (ℝ × ℝ) = ∪ (𝐽 ×t 𝐽) |
11 | 4, 10 | eqtr2i 2645 | . 2 ⊢ ∪ (𝐽 ×t 𝐽) = ∪ ran 𝑅 |
12 | 1, 2, 3 | dya2iocuni 30345 | . . . 4 ⊢ (𝑥 ∈ (𝐽 ×t 𝐽) → ∃𝑦 ∈ 𝒫 ran 𝑅∪ 𝑦 = 𝑥) |
13 | simpr 477 | . . . . . 6 ⊢ ((𝑦 ∈ 𝒫 ran 𝑅 ∧ ∪ 𝑦 = 𝑥) → ∪ 𝑦 = 𝑥) | |
14 | 1, 2, 3 | dya2iocct 30342 | . . . . . . . . 9 ⊢ ran 𝑅 ≼ ω |
15 | ctex 7970 | . . . . . . . . 9 ⊢ (ran 𝑅 ≼ ω → ran 𝑅 ∈ V) | |
16 | 14, 15 | mp1i 13 | . . . . . . . 8 ⊢ (𝑦 ∈ 𝒫 ran 𝑅 → ran 𝑅 ∈ V) |
17 | elpwi 4168 | . . . . . . . 8 ⊢ (𝑦 ∈ 𝒫 ran 𝑅 → 𝑦 ⊆ ran 𝑅) | |
18 | ssct 8041 | . . . . . . . . 9 ⊢ ((𝑦 ⊆ ran 𝑅 ∧ ran 𝑅 ≼ ω) → 𝑦 ≼ ω) | |
19 | 17, 14, 18 | sylancl 694 | . . . . . . . 8 ⊢ (𝑦 ∈ 𝒫 ran 𝑅 → 𝑦 ≼ ω) |
20 | elsigagen2 30211 | . . . . . . . 8 ⊢ ((ran 𝑅 ∈ V ∧ 𝑦 ⊆ ran 𝑅 ∧ 𝑦 ≼ ω) → ∪ 𝑦 ∈ (sigaGen‘ran 𝑅)) | |
21 | 16, 17, 19, 20 | syl3anc 1326 | . . . . . . 7 ⊢ (𝑦 ∈ 𝒫 ran 𝑅 → ∪ 𝑦 ∈ (sigaGen‘ran 𝑅)) |
22 | 21 | adantr 481 | . . . . . 6 ⊢ ((𝑦 ∈ 𝒫 ran 𝑅 ∧ ∪ 𝑦 = 𝑥) → ∪ 𝑦 ∈ (sigaGen‘ran 𝑅)) |
23 | 13, 22 | eqeltrrd 2702 | . . . . 5 ⊢ ((𝑦 ∈ 𝒫 ran 𝑅 ∧ ∪ 𝑦 = 𝑥) → 𝑥 ∈ (sigaGen‘ran 𝑅)) |
24 | 23 | rexlimiva 3028 | . . . 4 ⊢ (∃𝑦 ∈ 𝒫 ran 𝑅∪ 𝑦 = 𝑥 → 𝑥 ∈ (sigaGen‘ran 𝑅)) |
25 | 12, 24 | syl 17 | . . 3 ⊢ (𝑥 ∈ (𝐽 ×t 𝐽) → 𝑥 ∈ (sigaGen‘ran 𝑅)) |
26 | 25 | ssriv 3607 | . 2 ⊢ (𝐽 ×t 𝐽) ⊆ (sigaGen‘ran 𝑅) |
27 | 14, 15 | ax-mp 5 | . 2 ⊢ ran 𝑅 ∈ V |
28 | sigagenss2 30213 | . 2 ⊢ ((∪ (𝐽 ×t 𝐽) = ∪ ran 𝑅 ∧ (𝐽 ×t 𝐽) ⊆ (sigaGen‘ran 𝑅) ∧ ran 𝑅 ∈ V) → (sigaGen‘(𝐽 ×t 𝐽)) ⊆ (sigaGen‘ran 𝑅)) | |
29 | 11, 26, 27, 28 | mp3an 1424 | 1 ⊢ (sigaGen‘(𝐽 ×t 𝐽)) ⊆ (sigaGen‘ran 𝑅) |
Colors of variables: wff setvar class |
Syntax hints: ∧ wa 384 = wceq 1483 ∈ wcel 1990 ∃wrex 2913 Vcvv 3200 ⊆ wss 3574 𝒫 cpw 4158 ∪ cuni 4436 class class class wbr 4653 × cxp 5112 ran crn 5115 ‘cfv 5888 (class class class)co 6650 ↦ cmpt2 6652 ωcom 7065 ≼ cdom 7953 ℝcr 9935 1c1 9937 + caddc 9939 / cdiv 10684 2c2 11070 ℤcz 11377 (,)cioo 12175 [,)cico 12177 ↑cexp 12860 topGenctg 16098 Topctop 20698 ×t ctx 21363 sigaGencsigagen 30201 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-rep 4771 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 ax-inf2 8538 ax-ac2 9285 ax-cnex 9992 ax-resscn 9993 ax-1cn 9994 ax-icn 9995 ax-addcl 9996 ax-addrcl 9997 ax-mulcl 9998 ax-mulrcl 9999 ax-mulcom 10000 ax-addass 10001 ax-mulass 10002 ax-distr 10003 ax-i2m1 10004 ax-1ne0 10005 ax-1rid 10006 ax-rnegex 10007 ax-rrecex 10008 ax-cnre 10009 ax-pre-lttri 10010 ax-pre-lttrn 10011 ax-pre-ltadd 10012 ax-pre-mulgt0 10013 ax-pre-sup 10014 ax-addf 10015 ax-mulf 10016 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-fal 1489 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-nel 2898 df-ral 2917 df-rex 2918 df-reu 2919 df-rmo 2920 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-pss 3590 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-tp 4182 df-op 4184 df-uni 4437 df-int 4476 df-iun 4522 df-iin 4523 df-br 4654 df-opab 4713 df-mpt 4730 df-tr 4753 df-id 5024 df-eprel 5029 df-po 5035 df-so 5036 df-fr 5073 df-se 5074 df-we 5075 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-pred 5680 df-ord 5726 df-on 5727 df-lim 5728 df-suc 5729 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-isom 5897 df-riota 6611 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-of 6897 df-om 7066 df-1st 7168 df-2nd 7169 df-supp 7296 df-wrecs 7407 df-recs 7468 df-rdg 7506 df-1o 7560 df-2o 7561 df-oadd 7564 df-omul 7565 df-er 7742 df-map 7859 df-pm 7860 df-ixp 7909 df-en 7956 df-dom 7957 df-sdom 7958 df-fin 7959 df-fsupp 8276 df-fi 8317 df-sup 8348 df-inf 8349 df-oi 8415 df-card 8765 df-acn 8768 df-ac 8939 df-cda 8990 df-pnf 10076 df-mnf 10077 df-xr 10078 df-ltxr 10079 df-le 10080 df-sub 10268 df-neg 10269 df-div 10685 df-nn 11021 df-2 11079 df-3 11080 df-4 11081 df-5 11082 df-6 11083 df-7 11084 df-8 11085 df-9 11086 df-n0 11293 df-z 11378 df-dec 11494 df-uz 11688 df-q 11789 df-rp 11833 df-xneg 11946 df-xadd 11947 df-xmul 11948 df-ioo 12179 df-ioc 12180 df-ico 12181 df-icc 12182 df-fz 12327 df-fzo 12466 df-fl 12593 df-mod 12669 df-seq 12802 df-exp 12861 df-fac 13061 df-bc 13090 df-hash 13118 df-shft 13807 df-cj 13839 df-re 13840 df-im 13841 df-sqrt 13975 df-abs 13976 df-limsup 14202 df-clim 14219 df-rlim 14220 df-sum 14417 df-ef 14798 df-sin 14800 df-cos 14801 df-pi 14803 df-struct 15859 df-ndx 15860 df-slot 15861 df-base 15863 df-sets 15864 df-ress 15865 df-plusg 15954 df-mulr 15955 df-starv 15956 df-sca 15957 df-vsca 15958 df-ip 15959 df-tset 15960 df-ple 15961 df-ds 15964 df-unif 15965 df-hom 15966 df-cco 15967 df-rest 16083 df-topn 16084 df-0g 16102 df-gsum 16103 df-topgen 16104 df-pt 16105 df-prds 16108 df-xrs 16162 df-qtop 16167 df-imas 16168 df-xps 16170 df-mre 16246 df-mrc 16247 df-acs 16249 df-mgm 17242 df-sgrp 17284 df-mnd 17295 df-submnd 17336 df-mulg 17541 df-cntz 17750 df-cmn 18195 df-psmet 19738 df-xmet 19739 df-met 19740 df-bl 19741 df-mopn 19742 df-fbas 19743 df-fg 19744 df-cnfld 19747 df-refld 19951 df-top 20699 df-topon 20716 df-topsp 20737 df-bases 20750 df-cld 20823 df-ntr 20824 df-cls 20825 df-nei 20902 df-lp 20940 df-perf 20941 df-cn 21031 df-cnp 21032 df-haus 21119 df-cmp 21190 df-tx 21365 df-hmeo 21558 df-fil 21650 df-fm 21742 df-flim 21743 df-flf 21744 df-fcls 21745 df-xms 22125 df-ms 22126 df-tms 22127 df-cncf 22681 df-cfil 23053 df-cmet 23055 df-cms 23132 df-limc 23630 df-dv 23631 df-log 24303 df-cxp 24304 df-logb 24503 df-siga 30171 df-sigagen 30202 |
This theorem is referenced by: sxbrsigalem4 30349 |
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