fiunelcarsg - Mathbox for Thierry Arnoux

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Theorem fiunelcarsg 31569

Description: The Caratheodory measurable sets are closed under finite union. (Contributed by Thierry Arnoux, 23-May-2020.)

**Hypotheses**
Ref	Expression
carsgval.1	⊢ (𝜑 → 𝑂 ∈ 𝑉)
carsgval.2	⊢ (𝜑 → 𝑀:𝒫 𝑂⟶(0[,]+∞))
carsgsiga.1	⊢ (𝜑 → (𝑀‘∅) = 0)
carsgsiga.2	⊢ ((𝜑 ∧ 𝑥 ≼ ω ∧ 𝑥 ⊆ 𝒫 𝑂) → (𝑀‘∪ 𝑥) ≤ Σ^*𝑦 ∈ 𝑥(𝑀‘𝑦))
fiunelcarsg.1	⊢ (𝜑 → 𝐴 ∈ Fin)
fiunelcarsg.2	⊢ (𝜑 → 𝐴 ⊆ (toCaraSiga‘𝑀))

**Assertion**
Ref	Expression
fiunelcarsg	⊢ (𝜑 → ∪ 𝐴 ∈ (toCaraSiga‘𝑀))

Distinct variable groups: 𝑥,𝐴,𝑦 𝑥,𝑀,𝑦 𝑥,𝑂,𝑦 𝜑,𝑥,𝑦 Allowed substitution hints: 𝑉(𝑥,𝑦)

Proof of Theorem fiunelcarsg Dummy variables 𝑎 𝑒 𝑏 𝑓 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		unieq 4839	. . 3 ⊢ (𝑎 = ∅ → ∪ 𝑎 = ∪ ∅)
2		eqidd 2822	. . 3 ⊢ (𝑎 = ∅ → (toCaraSiga‘𝑀) = (toCaraSiga‘𝑀))
3	1, 2	eleq12d 2907	. 2 ⊢ (𝑎 = ∅ → (∪ 𝑎 ∈ (toCaraSiga‘𝑀) ↔ ∪ ∅ ∈ (toCaraSiga‘𝑀)))
4		unieq 4839	. . 3 ⊢ (𝑎 = 𝑏 → ∪ 𝑎 = ∪ 𝑏)
5		eqidd 2822	. . 3 ⊢ (𝑎 = 𝑏 → (toCaraSiga‘𝑀) = (toCaraSiga‘𝑀))
6	4, 5	eleq12d 2907	. 2 ⊢ (𝑎 = 𝑏 → (∪ 𝑎 ∈ (toCaraSiga‘𝑀) ↔ ∪ 𝑏 ∈ (toCaraSiga‘𝑀)))
7		unieq 4839	. . 3 ⊢ (𝑎 = (𝑏 ∪ {𝑥}) → ∪ 𝑎 = ∪ (𝑏 ∪ {𝑥}))
8		eqidd 2822	. . 3 ⊢ (𝑎 = (𝑏 ∪ {𝑥}) → (toCaraSiga‘𝑀) = (toCaraSiga‘𝑀))
9	7, 8	eleq12d 2907	. 2 ⊢ (𝑎 = (𝑏 ∪ {𝑥}) → (∪ 𝑎 ∈ (toCaraSiga‘𝑀) ↔ ∪ (𝑏 ∪ {𝑥}) ∈ (toCaraSiga‘𝑀)))
10		unieq 4839	. . 3 ⊢ (𝑎 = 𝐴 → ∪ 𝑎 = ∪ 𝐴)
11		eqidd 2822	. . 3 ⊢ (𝑎 = 𝐴 → (toCaraSiga‘𝑀) = (toCaraSiga‘𝑀))
12	10, 11	eleq12d 2907	. 2 ⊢ (𝑎 = 𝐴 → (∪ 𝑎 ∈ (toCaraSiga‘𝑀) ↔ ∪ 𝐴 ∈ (toCaraSiga‘𝑀)))
13		uni0 4858	. . . 4 ⊢ ∪ ∅ = ∅
14		difid 4329	. . . 4 ⊢ (𝑂 ∖ 𝑂) = ∅
15	13, 14	eqtr4i 2847	. . 3 ⊢ ∪ ∅ = (𝑂 ∖ 𝑂)
16		carsgval.1	. . . 4 ⊢ (𝜑 → 𝑂 ∈ 𝑉)
17		carsgval.2	. . . 4 ⊢ (𝜑 → 𝑀:𝒫 𝑂⟶(0[,]+∞))
18		carsgsiga.1	. . . . 5 ⊢ (𝜑 → (𝑀‘∅) = 0)
19	16, 17, 18	baselcarsg 31559	. . . 4 ⊢ (𝜑 → 𝑂 ∈ (toCaraSiga‘𝑀))
20	16, 17, 19	difelcarsg 31563	. . 3 ⊢ (𝜑 → (𝑂 ∖ 𝑂) ∈ (toCaraSiga‘𝑀))
21	15, 20	eqeltrid 2917	. 2 ⊢ (𝜑 → ∪ ∅ ∈ (toCaraSiga‘𝑀))
22		uniun 4850	. . . . 5 ⊢ ∪ (𝑏 ∪ {𝑥}) = (∪ 𝑏 ∪ ∪ {𝑥})
23		vex 3497	. . . . . . 7 ⊢ 𝑥 ∈ V
24	23	unisn 4847	. . . . . 6 ⊢ ∪ {𝑥} = 𝑥
25	24	uneq2i 4135	. . . . 5 ⊢ (∪ 𝑏 ∪ ∪ {𝑥}) = (∪ 𝑏 ∪ 𝑥)
26	22, 25	eqtri 2844	. . . 4 ⊢ ∪ (𝑏 ∪ {𝑥}) = (∪ 𝑏 ∪ 𝑥)
27	16	ad2antrr 724	. . . . 5 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝐴 ∧ 𝑥 ∈ (𝐴 ∖ 𝑏))) ∧ ∪ 𝑏 ∈ (toCaraSiga‘𝑀)) → 𝑂 ∈ 𝑉)
28	17	ad2antrr 724	. . . . 5 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝐴 ∧ 𝑥 ∈ (𝐴 ∖ 𝑏))) ∧ ∪ 𝑏 ∈ (toCaraSiga‘𝑀)) → 𝑀:𝒫 𝑂⟶(0[,]+∞))
29		simpr 487	. . . . 5 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝐴 ∧ 𝑥 ∈ (𝐴 ∖ 𝑏))) ∧ ∪ 𝑏 ∈ (toCaraSiga‘𝑀)) → ∪ 𝑏 ∈ (toCaraSiga‘𝑀))
30		simpll 765	. . . . . 6 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝐴 ∧ 𝑥 ∈ (𝐴 ∖ 𝑏))) ∧ ∪ 𝑏 ∈ (toCaraSiga‘𝑀)) → 𝜑)
31		carsgsiga.2	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ≼ ω ∧ 𝑥 ⊆ 𝒫 𝑂) → (𝑀‘∪ 𝑥) ≤ Σ^*𝑦 ∈ 𝑥(𝑀‘𝑦))
32	16, 17, 18, 31	carsgsigalem 31568	. . . . . 6 ⊢ ((𝜑 ∧ 𝑒 ∈ 𝒫 𝑂 ∧ 𝑓 ∈ 𝒫 𝑂) → (𝑀‘(𝑒 ∪ 𝑓)) ≤ ((𝑀‘𝑒) +_𝑒 (𝑀‘𝑓)))
33	30, 32	syl3an1 1159	. . . . 5 ⊢ ((((𝜑 ∧ (𝑏 ⊆ 𝐴 ∧ 𝑥 ∈ (𝐴 ∖ 𝑏))) ∧ ∪ 𝑏 ∈ (toCaraSiga‘𝑀)) ∧ 𝑒 ∈ 𝒫 𝑂 ∧ 𝑓 ∈ 𝒫 𝑂) → (𝑀‘(𝑒 ∪ 𝑓)) ≤ ((𝑀‘𝑒) +_𝑒 (𝑀‘𝑓)))
34		fiunelcarsg.2	. . . . . . 7 ⊢ (𝜑 → 𝐴 ⊆ (toCaraSiga‘𝑀))
35	34	ad2antrr 724	. . . . . 6 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝐴 ∧ 𝑥 ∈ (𝐴 ∖ 𝑏))) ∧ ∪ 𝑏 ∈ (toCaraSiga‘𝑀)) → 𝐴 ⊆ (toCaraSiga‘𝑀))
36		simplrr 776	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝐴 ∧ 𝑥 ∈ (𝐴 ∖ 𝑏))) ∧ ∪ 𝑏 ∈ (toCaraSiga‘𝑀)) → 𝑥 ∈ (𝐴 ∖ 𝑏))
37	36	eldifad 3947	. . . . . 6 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝐴 ∧ 𝑥 ∈ (𝐴 ∖ 𝑏))) ∧ ∪ 𝑏 ∈ (toCaraSiga‘𝑀)) → 𝑥 ∈ 𝐴)
38	35, 37	sseldd 3967	. . . . 5 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝐴 ∧ 𝑥 ∈ (𝐴 ∖ 𝑏))) ∧ ∪ 𝑏 ∈ (toCaraSiga‘𝑀)) → 𝑥 ∈ (toCaraSiga‘𝑀))
39	27, 28, 29, 33, 38	unelcarsg 31565	. . . 4 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝐴 ∧ 𝑥 ∈ (𝐴 ∖ 𝑏))) ∧ ∪ 𝑏 ∈ (toCaraSiga‘𝑀)) → (∪ 𝑏 ∪ 𝑥) ∈ (toCaraSiga‘𝑀))
40	26, 39	eqeltrid 2917	. . 3 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝐴 ∧ 𝑥 ∈ (𝐴 ∖ 𝑏))) ∧ ∪ 𝑏 ∈ (toCaraSiga‘𝑀)) → ∪ (𝑏 ∪ {𝑥}) ∈ (toCaraSiga‘𝑀))
41	40	ex 415	. 2 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝐴 ∧ 𝑥 ∈ (𝐴 ∖ 𝑏))) → (∪ 𝑏 ∈ (toCaraSiga‘𝑀) → ∪ (𝑏 ∪ {𝑥}) ∈ (toCaraSiga‘𝑀)))
42		fiunelcarsg.1	. 2 ⊢ (𝜑 → 𝐴 ∈ Fin)
43	3, 6, 9, 12, 21, 41, 42	findcard2d 8754	1 ⊢ (𝜑 → ∪ 𝐴 ∈ (toCaraSiga‘𝑀))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 398 ∧ w3a 1083 = wceq 1533 ∈ wcel 2110 ∖ cdif 3932 ∪ cun 3933 ⊆ wss 3935 ∅c0 4290 𝒫 cpw 4538 {csn 4560 ∪ cuni 4831 class class class wbr 5058 ⟶wf 6345 ‘cfv 6349 (class class class)co 7150 ωcom 7574 ≼ cdom 8501 Fincfn 8503 0cc0 10531 +∞cpnf 10666 ≤ cle 10670 +_𝑒 cxad 12499 [,]cicc 12735 Σ^*cesum 31281 toCaraSigaccarsg 31554

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 ax-rep 5182 ax-sep 5195 ax-nul 5202 ax-pow 5258 ax-pr 5321 ax-un 7455 ax-inf2 9098 ax-cnex 10587 ax-resscn 10588 ax-1cn 10589 ax-icn 10590 ax-addcl 10591 ax-addrcl 10592 ax-mulcl 10593 ax-mulrcl 10594 ax-mulcom 10595 ax-addass 10596 ax-mulass 10597 ax-distr 10598 ax-i2m1 10599 ax-1ne0 10600 ax-1rid 10601 ax-rnegex 10602 ax-rrecex 10603 ax-cnre 10604 ax-pre-lttri 10605 ax-pre-lttrn 10606 ax-pre-ltadd 10607 ax-pre-mulgt0 10608 ax-pre-sup 10609 ax-addf 10610 ax-mulf 10611

This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1536 df-fal 1546 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-reu 3145 df-rmo 3146 df-rab 3147 df-v 3496 df-sbc 3772 df-csb 3883 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-pss 3953 df-nul 4291 df-if 4467 df-pw 4540 df-sn 4561 df-pr 4563 df-tp 4565 df-op 4567 df-uni 4832 df-int 4869 df-iun 4913 df-iin 4914 df-br 5059 df-opab 5121 df-mpt 5139 df-tr 5165 df-id 5454 df-eprel 5459 df-po 5468 df-so 5469 df-fr 5508 df-se 5509 df-we 5510 df-xp 5555 df-rel 5556 df-cnv 5557 df-co 5558 df-dm 5559 df-rn 5560 df-res 5561 df-ima 5562 df-pred 6142 df-ord 6188 df-on 6189 df-lim 6190 df-suc 6191 df-iota 6308 df-fun 6351 df-fn 6352 df-f 6353 df-f1 6354 df-fo 6355 df-f1o 6356 df-fv 6357 df-isom 6358 df-riota 7108 df-ov 7153 df-oprab 7154 df-mpo 7155 df-of 7403 df-om 7575 df-1st 7683 df-2nd 7684 df-supp 7825 df-wrecs 7941 df-recs 8002 df-rdg 8040 df-1o 8096 df-2o 8097 df-oadd 8100 df-er 8283 df-map 8402 df-pm 8403 df-ixp 8456 df-en 8504 df-dom 8505 df-sdom 8506 df-fin 8507 df-fsupp 8828 df-fi 8869 df-sup 8900 df-inf 8901 df-oi 8968 df-dju 9324 df-card 9362 df-pnf 10671 df-mnf 10672 df-xr 10673 df-ltxr 10674 df-le 10675 df-sub 10866 df-neg 10867 df-div 11292 df-nn 11633 df-2 11694 df-3 11695 df-4 11696 df-5 11697 df-6 11698 df-7 11699 df-8 11700 df-9 11701 df-n0 11892 df-z 11976 df-dec 12093 df-uz 12238 df-q 12343 df-rp 12384 df-xneg 12501 df-xadd 12502 df-xmul 12503 df-ioo 12736 df-ioc 12737 df-ico 12738 df-icc 12739 df-fz 12887 df-fzo 13028 df-fl 13156 df-mod 13232 df-seq 13364 df-exp 13424 df-fac 13628 df-bc 13657 df-hash 13685 df-shft 14420 df-cj 14452 df-re 14453 df-im 14454 df-sqrt 14588 df-abs 14589 df-limsup 14822 df-clim 14839 df-rlim 14840 df-sum 15037 df-ef 15415 df-sin 15417 df-cos 15418 df-pi 15420 df-struct 16479 df-ndx 16480 df-slot 16481 df-base 16483 df-sets 16484 df-ress 16485 df-plusg 16572 df-mulr 16573 df-starv 16574 df-sca 16575 df-vsca 16576 df-ip 16577 df-tset 16578 df-ple 16579 df-ds 16581 df-unif 16582 df-hom 16583 df-cco 16584 df-rest 16690 df-topn 16691 df-0g 16709 df-gsum 16710 df-topgen 16711 df-pt 16712 df-prds 16715 df-ordt 16768 df-xrs 16769 df-qtop 16774 df-imas 16775 df-xps 16777 df-mre 16851 df-mrc 16852 df-acs 16854 df-ps 17804 df-tsr 17805 df-plusf 17845 df-mgm 17846 df-sgrp 17895 df-mnd 17906 df-mhm 17950 df-submnd 17951 df-grp 18100 df-minusg 18101 df-sbg 18102 df-mulg 18219 df-subg 18270 df-cntz 18441 df-cmn 18902 df-abl 18903 df-mgp 19234 df-ur 19246 df-ring 19293 df-cring 19294 df-subrg 19527 df-abv 19582 df-lmod 19630 df-scaf 19631 df-sra 19938 df-rgmod 19939 df-psmet 20531 df-xmet 20532 df-met 20533 df-bl 20534 df-mopn 20535 df-fbas 20536 df-fg 20537 df-cnfld 20540 df-top 21496 df-topon 21513 df-topsp 21535 df-bases 21548 df-cld 21621 df-ntr 21622 df-cls 21623 df-nei 21700 df-lp 21738 df-perf 21739 df-cn 21829 df-cnp 21830 df-haus 21917 df-tx 22164 df-hmeo 22357 df-fil 22448 df-fm 22540 df-flim 22541 df-flf 22542 df-tmd 22674 df-tgp 22675 df-tsms 22729 df-trg 22762 df-xms 22924 df-ms 22925 df-tms 22926 df-nm 23186 df-ngp 23187 df-nrg 23189 df-nlm 23190 df-ii 23479 df-cncf 23480 df-limc 24458 df-dv 24459 df-log 25134 df-esum 31282 df-carsg 31555

This theorem is referenced by: carsgclctunlem1 31570 carsgclctunlem2 31572 carsgclctunlem3 31573

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