Theorem caragenuncl 40021

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

Hypotheses

Ref	Expression
caragenuncl.1	⊢ (𝜑 → 𝑂 ∈ OutMeas)
caragenuncl.2	⊢ 𝑆 = (CaraGen‘𝑂)
caragenuncl.3	⊢ (𝜑 → 𝐸 ∈ 𝑆)
caragenuncl.4	⊢ (𝜑 → 𝐹 ∈ 𝑆)

Assertion

Ref	Expression
caragenuncl	⊢ (𝜑 → (𝐸 ∪ 𝐹) ∈ 𝑆)

Proof of Theorem caragenuncl

Dummy variable 𝑎 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		caragenuncl.1	. 2 ⊢ (𝜑 → 𝑂 ∈ OutMeas)
2		eqid 2626	. 2 ⊢ ∪ dom 𝑂 = ∪ dom 𝑂
3		caragenuncl.2	. 2 ⊢ 𝑆 = (CaraGen‘𝑂)
4		caragenuncl.3	. . . . 5 ⊢ (𝜑 → 𝐸 ∈ 𝑆)
5	1, 3, 4, 2	caragenelss 40009	. . . 4 ⊢ (𝜑 → 𝐸 ⊆ ∪ dom 𝑂)
6		caragenuncl.4	. . . . 5 ⊢ (𝜑 → 𝐹 ∈ 𝑆)
7	1, 3, 6, 2	caragenelss 40009	. . . 4 ⊢ (𝜑 → 𝐹 ⊆ ∪ dom 𝑂)
8	5, 7	unssd 3772	. . 3 ⊢ (𝜑 → (𝐸 ∪ 𝐹) ⊆ ∪ dom 𝑂)
9	1, 2	unidmex 38688	. . . . 5 ⊢ (𝜑 → ∪ dom 𝑂 ∈ V)
10		ssexg 4769	. . . . 5 ⊢ (((𝐸 ∪ 𝐹) ⊆ ∪ dom 𝑂 ∧ ∪ dom 𝑂 ∈ V) → (𝐸 ∪ 𝐹) ∈ V)
11	8, 9, 10	syl2anc 692	. . . 4 ⊢ (𝜑 → (𝐸 ∪ 𝐹) ∈ V)
12		elpwg 4143	. . . 4 ⊢ ((𝐸 ∪ 𝐹) ∈ V → ((𝐸 ∪ 𝐹) ∈ 𝒫 ∪ dom 𝑂 ↔ (𝐸 ∪ 𝐹) ⊆ ∪ dom 𝑂))
13	11, 12	syl 17	. . 3 ⊢ (𝜑 → ((𝐸 ∪ 𝐹) ∈ 𝒫 ∪ dom 𝑂 ↔ (𝐸 ∪ 𝐹) ⊆ ∪ dom 𝑂))
14	8, 13	mpbird 247	. 2 ⊢ (𝜑 → (𝐸 ∪ 𝐹) ∈ 𝒫 ∪ dom 𝑂)
15	1	adantr 481	. . 3 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝒫 ∪ dom 𝑂) → 𝑂 ∈ OutMeas)
16	4	adantr 481	. . 3 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝒫 ∪ dom 𝑂) → 𝐸 ∈ 𝑆)
17	6	adantr 481	. . 3 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝒫 ∪ dom 𝑂) → 𝐹 ∈ 𝑆)
18		elpwi 4145	. . . 4 ⊢ (𝑎 ∈ 𝒫 ∪ dom 𝑂 → 𝑎 ⊆ ∪ dom 𝑂)
19	18	adantl 482	. . 3 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝒫 ∪ dom 𝑂) → 𝑎 ⊆ ∪ dom 𝑂)
20	15, 3, 16, 17, 2, 19	caragenuncllem 40020	. 2 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝒫 ∪ dom 𝑂) → ((𝑂‘(𝑎 ∩ (𝐸 ∪ 𝐹))) +𝑒 (𝑂‘(𝑎 ∖ (𝐸 ∪ 𝐹)))) = (𝑂‘𝑎))
21	1, 2, 3, 14, 20	carageneld 40010	1 ⊢ (𝜑 → (𝐸 ∪ 𝐹) ∈ 𝑆)

Syntax hints:   → wi 4   ↔ wb 196   ∧ wa 384   = wceq 1480   ∈ wcel 1992  Vcvv 3191   ∪ cun 3558   ⊆ wss 3560  𝒫 cpw 4135  ∪ cuni 4407  dom cdm 5079  ‘cfv 5850  OutMeascome 39997  CaraGenccaragen 39999

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1841  ax-6 1890  ax-7 1937  ax-8 1994  ax-9 2001  ax-10 2021  ax-11 2036  ax-12 2049  ax-13 2250  ax-ext 2606  ax-sep 4746  ax-nul 4754  ax-pow 4808  ax-pr 4872  ax-un 6903  ax-cnex 9937  ax-resscn 9938  ax-1cn 9939  ax-icn 9940  ax-addcl 9941  ax-addrcl 9942  ax-mulcl 9943  ax-mulrcl 9944  ax-addass 9946  ax-i2m1 9949  ax-1ne0 9950  ax-rnegex 9952  ax-rrecex 9953  ax-cnre 9954  ax-pre-lttri 9955  ax-pre-lttrn 9956

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1037  df-3an 1038  df-tru 1483  df-ex 1702  df-nf 1707  df-sb 1883  df-eu 2478  df-mo 2479  df-clab 2613  df-cleq 2619  df-clel 2622  df-nfc 2756  df-ne 2797  df-nel 2900  df-ral 2917  df-rex 2918  df-rab 2921  df-v 3193  df-sbc 3423  df-csb 3520  df-dif 3563  df-un 3565  df-in 3567  df-ss 3574  df-nul 3897  df-if 4064  df-pw 4137  df-sn 4154  df-pr 4156  df-op 4160  df-uni 4408  df-iun 4492  df-br 4619  df-opab 4679  df-mpt 4680  df-id 4994  df-po 5000  df-so 5001  df-xp 5085  df-rel 5086  df-cnv 5087  df-co 5088  df-dm 5089  df-rn 5090  df-res 5091  df-ima 5092  df-iota 5813  df-fun 5852  df-fn 5853  df-f 5854  df-f1 5855  df-fo 5856  df-f1o 5857  df-fv 5858  df-ov 6608  df-oprab 6609  df-mpt2 6610  df-1st 7116  df-2nd 7117  df-er 7688  df-en 7901  df-dom 7902  df-sdom 7903  df-pnf 10021  df-mnf 10022  df-xr 10023  df-ltxr 10024  df-le 10025  df-xadd 11891  df-icc 12121  df-ome 39998  df-caragen 40000

This theorem is referenced by:  caragenfiiuncl  40023