Theorem caragenuncl 39403

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 2610	. 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 39391	. . . 4 ⊢ (𝜑 → 𝐸 ⊆ ∪ dom 𝑂)
6		caragenuncl.4	. . . . 5 ⊢ (𝜑 → 𝐹 ∈ 𝑆)
7	1, 3, 6, 2	caragenelss 39391	. . . 4 ⊢ (𝜑 → 𝐹 ⊆ ∪ dom 𝑂)
8	5, 7	unssd 3751	. . 3 ⊢ (𝜑 → (𝐸 ∪ 𝐹) ⊆ ∪ dom 𝑂)
9	1, 2	unidmex 38242	. . . . 5 ⊢ (𝜑 → ∪ dom 𝑂 ∈ V)
10		ssexg 4732	. . . . 5 ⊢ (((𝐸 ∪ 𝐹) ⊆ ∪ dom 𝑂 ∧ ∪ dom 𝑂 ∈ V) → (𝐸 ∪ 𝐹) ∈ V)
11	8, 9, 10	syl2anc 691	. . . 4 ⊢ (𝜑 → (𝐸 ∪ 𝐹) ∈ V)
12		elpwg 4116	. . . 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 246	. 2 ⊢ (𝜑 → (𝐸 ∪ 𝐹) ∈ 𝒫 ∪ dom 𝑂)
15	1	adantr 480	. . 3 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝒫 ∪ dom 𝑂) → 𝑂 ∈ OutMeas)
16	4	adantr 480	. . 3 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝒫 ∪ dom 𝑂) → 𝐸 ∈ 𝑆)
17	6	adantr 480	. . 3 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝒫 ∪ dom 𝑂) → 𝐹 ∈ 𝑆)
18		elpwi 4117	. . . 4 ⊢ (𝑎 ∈ 𝒫 ∪ dom 𝑂 → 𝑎 ⊆ ∪ dom 𝑂)
19	18	adantl 481	. . 3 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝒫 ∪ dom 𝑂) → 𝑎 ⊆ ∪ dom 𝑂)
20	15, 3, 16, 17, 2, 19	caragenuncllem 39402	. 2 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝒫 ∪ dom 𝑂) → ((𝑂‘(𝑎 ∩ (𝐸 ∪ 𝐹))) +𝑒 (𝑂‘(𝑎 ∖ (𝐸 ∪ 𝐹)))) = (𝑂‘𝑎))
21	1, 2, 3, 14, 20	carageneld 39392	1 ⊢ (𝜑 → (𝐸 ∪ 𝐹) ∈ 𝑆)

Syntax hints:   → wi 4   ↔ wb 195   ∧ wa 383   = wceq 1475   ∈ wcel 1977  Vcvv 3173   ∪ cun 3538   ⊆ wss 3540  𝒫 cpw 4108  ∪ cuni 4372  dom cdm 5038  ‘cfv 5804  OutMeascome 39379  CaraGenccaragen 39381

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-cnex 9871  ax-resscn 9872  ax-1cn 9873  ax-icn 9874  ax-addcl 9875  ax-addrcl 9876  ax-mulcl 9877  ax-mulrcl 9878  ax-addass 9880  ax-i2m1 9883  ax-1ne0 9884  ax-rnegex 9886  ax-rrecex 9887  ax-cnre 9888  ax-pre-lttri 9889  ax-pre-lttrn 9890

This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-op 4132  df-uni 4373  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-id 4953  df-po 4959  df-so 4960  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-1st 7059  df-2nd 7060  df-er 7629  df-en 7842  df-dom 7843  df-sdom 7844  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-xadd 11823  df-icc 12053  df-ome 39380  df-caragen 39382

This theorem is referenced by:  caragenfiiuncl  39405