caragenunicl - Mathbox for Glauco Siliprandi

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Theorem caragenunicl 45906

Description: The Caratheodory's construction is closed under countable union. Step (d) in the proof of Theorem 113C of [Fremlin1] p. 20. (Contributed by Glauco Siliprandi, 17-Aug-2020.)

**Hypotheses**
Ref	Expression
caragenunicl.o	⊢ (𝜑 → 𝑂 ∈ OutMeas)
caragenunicl.s	⊢ 𝑆 = (CaraGen‘𝑂)
caragenunicl.y	⊢ (𝜑 → 𝑋 ⊆ 𝑆)
caragenunicl.ctb	⊢ (𝜑 → 𝑋 ≼ ω)

**Assertion**
Ref	Expression
caragenunicl	⊢ (𝜑 → ∪ 𝑋 ∈ 𝑆)

Proof of Theorem caragenunicl Dummy variables 𝑛 𝑓 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		unieq 4914	. . . . 5 ⊢ (𝑋 = ∅ → ∪ 𝑋 = ∪ ∅)
2		uni0 4933	. . . . 5 ⊢ ∪ ∅ = ∅
3	1, 2	eqtrdi 2784	. . . 4 ⊢ (𝑋 = ∅ → ∪ 𝑋 = ∅)
4	3	adantl 481	. . 3 ⊢ ((𝜑 ∧ 𝑋 = ∅) → ∪ 𝑋 = ∅)
5		caragenunicl.o	. . . . 5 ⊢ (𝜑 → 𝑂 ∈ OutMeas)
6		caragenunicl.s	. . . . 5 ⊢ 𝑆 = (CaraGen‘𝑂)
7	5, 6	caragen0 45888	. . . 4 ⊢ (𝜑 → ∅ ∈ 𝑆)
8	7	adantr 480	. . 3 ⊢ ((𝜑 ∧ 𝑋 = ∅) → ∅ ∈ 𝑆)
9	4, 8	eqeltrd 2829	. 2 ⊢ ((𝜑 ∧ 𝑋 = ∅) → ∪ 𝑋 ∈ 𝑆)
10		simpl 482	. . 3 ⊢ ((𝜑 ∧ ¬ 𝑋 = ∅) → 𝜑)
11		neqne 2944	. . . 4 ⊢ (¬ 𝑋 = ∅ → 𝑋 ≠ ∅)
12	11	adantl 481	. . 3 ⊢ ((𝜑 ∧ ¬ 𝑋 = ∅) → 𝑋 ≠ ∅)
13		simpr 484	. . . . . 6 ⊢ ((𝜑 ∧ 𝑋 ≠ ∅) → 𝑋 ≠ ∅)
14		caragenunicl.ctb	. . . . . . . . 9 ⊢ (𝜑 → 𝑋 ≼ ω)
15		reldom 8963	. . . . . . . . . 10 ⊢ Rel ≼
16		brrelex1 5725	. . . . . . . . . 10 ⊢ ((Rel ≼ ∧ 𝑋 ≼ ω) → 𝑋 ∈ V)
17	15, 16	mpan 689	. . . . . . . . 9 ⊢ (𝑋 ≼ ω → 𝑋 ∈ V)
18	14, 17	syl 17	. . . . . . . 8 ⊢ (𝜑 → 𝑋 ∈ V)
19	18	adantr 480	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑋 ≠ ∅) → 𝑋 ∈ V)
20		0sdomg 9122	. . . . . . 7 ⊢ (𝑋 ∈ V → (∅ ≺ 𝑋 ↔ 𝑋 ≠ ∅))
21	19, 20	syl 17	. . . . . 6 ⊢ ((𝜑 ∧ 𝑋 ≠ ∅) → (∅ ≺ 𝑋 ↔ 𝑋 ≠ ∅))
22	13, 21	mpbird 257	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 ≠ ∅) → ∅ ≺ 𝑋)
23		nnenom 13971	. . . . . . . . 9 ⊢ ℕ ≈ ω
24	23	ensymi 9018	. . . . . . . 8 ⊢ ω ≈ ℕ
25	24	a1i 11	. . . . . . 7 ⊢ (𝜑 → ω ≈ ℕ)
26		domentr 9027	. . . . . . 7 ⊢ ((𝑋 ≼ ω ∧ ω ≈ ℕ) → 𝑋 ≼ ℕ)
27	14, 25, 26	syl2anc 583	. . . . . 6 ⊢ (𝜑 → 𝑋 ≼ ℕ)
28	27	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 ≠ ∅) → 𝑋 ≼ ℕ)
29		fodomr 9146	. . . . 5 ⊢ ((∅ ≺ 𝑋 ∧ 𝑋 ≼ ℕ) → ∃𝑓 𝑓:ℕ–onto→𝑋)
30	22, 28, 29	syl2anc 583	. . . 4 ⊢ ((𝜑 ∧ 𝑋 ≠ ∅) → ∃𝑓 𝑓:ℕ–onto→𝑋)
31		founiiun 44546	. . . . . . . . 9 ⊢ (𝑓:ℕ–onto→𝑋 → ∪ 𝑋 = ∪ 𝑛 ∈ ℕ (𝑓‘𝑛))
32	31	adantl 481	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑓:ℕ–onto→𝑋) → ∪ 𝑋 = ∪ 𝑛 ∈ ℕ (𝑓‘𝑛))
33	5	adantr 480	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑓:ℕ–onto→𝑋) → 𝑂 ∈ OutMeas)
34		1zzd 12617	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑓:ℕ–onto→𝑋) → 1 ∈ ℤ)
35		nnuz 12889	. . . . . . . . 9 ⊢ ℕ = (ℤ_≥‘1)
36		fof 6805	. . . . . . . . . . 11 ⊢ (𝑓:ℕ–onto→𝑋 → 𝑓:ℕ⟶𝑋)
37	36	adantl 481	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑓:ℕ–onto→𝑋) → 𝑓:ℕ⟶𝑋)
38		caragenunicl.y	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑋 ⊆ 𝑆)
39	38	adantr 480	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑓:ℕ–onto→𝑋) → 𝑋 ⊆ 𝑆)
40	37, 39	fssd 6734	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑓:ℕ–onto→𝑋) → 𝑓:ℕ⟶𝑆)
41	33, 6, 34, 35, 40	carageniuncl 45905	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑓:ℕ–onto→𝑋) → ∪ 𝑛 ∈ ℕ (𝑓‘𝑛) ∈ 𝑆)
42	32, 41	eqeltrd 2829	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑓:ℕ–onto→𝑋) → ∪ 𝑋 ∈ 𝑆)
43	42	ex 412	. . . . . 6 ⊢ (𝜑 → (𝑓:ℕ–onto→𝑋 → ∪ 𝑋 ∈ 𝑆))
44	43	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ 𝑋 ≠ ∅) → (𝑓:ℕ–onto→𝑋 → ∪ 𝑋 ∈ 𝑆))
45	44	exlimdv 1929	. . . 4 ⊢ ((𝜑 ∧ 𝑋 ≠ ∅) → (∃𝑓 𝑓:ℕ–onto→𝑋 → ∪ 𝑋 ∈ 𝑆))
46	30, 45	mpd 15	. . 3 ⊢ ((𝜑 ∧ 𝑋 ≠ ∅) → ∪ 𝑋 ∈ 𝑆)
47	10, 12, 46	syl2anc 583	. 2 ⊢ ((𝜑 ∧ ¬ 𝑋 = ∅) → ∪ 𝑋 ∈ 𝑆)
48	9, 47	pm2.61dan 812	1 ⊢ (𝜑 → ∪ 𝑋 ∈ 𝑆)

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 395 = wceq 1534 ∃wex 1774 ∈ wcel 2099 ≠ wne 2936 Vcvv 3470 ⊆ wss 3945 ∅c0 4318 ∪ cuni 4903 ∪ ciun 4991 class class class wbr 5142 Rel wrel 5677 ⟶wf 6538 –onto→wfo 6540 ‘cfv 6542 ωcom 7864 ≈ cen 8954 ≼ cdom 8955 ≺ csdm 8956 1c1 11133 ℕcn 12236 OutMeascome 45871 CaraGenccaragen 45873

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1906 ax-6 1964 ax-7 2004 ax-8 2101 ax-9 2109 ax-10 2130 ax-11 2147 ax-12 2167 ax-ext 2699 ax-rep 5279 ax-sep 5293 ax-nul 5300 ax-pow 5359 ax-pr 5423 ax-un 7734 ax-inf2 9658 ax-ac2 10480 ax-cnex 11188 ax-resscn 11189 ax-1cn 11190 ax-icn 11191 ax-addcl 11192 ax-addrcl 11193 ax-mulcl 11194 ax-mulrcl 11195 ax-mulcom 11196 ax-addass 11197 ax-mulass 11198 ax-distr 11199 ax-i2m1 11200 ax-1ne0 11201 ax-1rid 11202 ax-rnegex 11203 ax-rrecex 11204 ax-cnre 11205 ax-pre-lttri 11206 ax-pre-lttrn 11207 ax-pre-ltadd 11208 ax-pre-mulgt0 11209 ax-pre-sup 11210

This theorem depends on definitions: df-bi 206 df-an 396 df-or 847 df-3or 1086 df-3an 1087 df-tru 1537 df-fal 1547 df-ex 1775 df-nf 1779 df-sb 2061 df-mo 2530 df-eu 2559 df-clab 2706 df-cleq 2720 df-clel 2806 df-nfc 2881 df-ne 2937 df-nel 3043 df-ral 3058 df-rex 3067 df-rmo 3372 df-reu 3373 df-rab 3429 df-v 3472 df-sbc 3776 df-csb 3891 df-dif 3948 df-un 3950 df-in 3952 df-ss 3962 df-pss 3964 df-nul 4319 df-if 4525 df-pw 4600 df-sn 4625 df-pr 4627 df-op 4631 df-uni 4904 df-int 4945 df-iun 4993 df-disj 5108 df-br 5143 df-opab 5205 df-mpt 5226 df-tr 5260 df-id 5570 df-eprel 5576 df-po 5584 df-so 5585 df-fr 5627 df-se 5628 df-we 5629 df-xp 5678 df-rel 5679 df-cnv 5680 df-co 5681 df-dm 5682 df-rn 5683 df-res 5684 df-ima 5685 df-pred 6299 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-isom 6551 df-riota 7370 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7865 df-1st 7987 df-2nd 7988 df-frecs 8280 df-wrecs 8311 df-recs 8385 df-rdg 8424 df-1o 8480 df-oadd 8484 df-omul 8485 df-er 8718 df-map 8840 df-en 8958 df-dom 8959 df-sdom 8960 df-fin 8961 df-sup 9459 df-inf 9460 df-oi 9527 df-card 9956 df-acn 9959 df-ac 10133 df-pnf 11274 df-mnf 11275 df-xr 11276 df-ltxr 11277 df-le 11278 df-sub 11470 df-neg 11471 df-div 11896 df-nn 12237 df-2 12299 df-3 12300 df-n0 12497 df-z 12583 df-uz 12847 df-q 12957 df-rp 13001 df-xadd 13119 df-ico 13356 df-icc 13357 df-fz 13511 df-fzo 13654 df-seq 13993 df-exp 14053 df-hash 14316 df-cj 15072 df-re 15073 df-im 15074 df-sqrt 15208 df-abs 15209 df-clim 15458 df-sum 15659 df-sumge0 45745 df-ome 45872 df-caragen 45874

This theorem is referenced by: caragensal 45907

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