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Theorem caragenuncl 47728
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.
StepHypRef Expression
1 caragenuncl.1 . 2 (𝜑 → 𝑂 ∈ OutMeas)
2 eqid 2763 . 2 ∪ dom 𝑂 = ∪ dom 𝑂
3 caragenuncl.2 . 2 𝑆 = (CaraGen‘𝑂)
4 caragenuncl.3 . . . . 5 (𝜑 → 𝐸 ∈ 𝑆)
51, 3, 4, 2caragenelss 47716 . . . 4 (𝜑 → 𝐸 ⊆ ∪ dom 𝑂)
6 caragenuncl.4 . . . . 5 (𝜑 → 𝐹 ∈ 𝑆)
71, 3, 6, 2caragenelss 47716 . . . 4 (𝜑 → 𝐹 ⊆ ∪ dom 𝑂)
85, 7unssd 4193 . . 3 (𝜑 → (𝐸 ∪ 𝐹) ⊆ ∪ dom 𝑂)
91, 2unidmex 46272 . . . . 5 (𝜑 → ∪ dom 𝑂 ∈ V)
10 ssexg 5285 . . . . 5 (((𝐸 ∪ 𝐹) ⊆ ∪ dom 𝑂 ∧ ∪ dom 𝑂 ∈ V) → (𝐸 ∪ 𝐹) ∈ V)
118, 9, 10syl2anc 596 . . . 4 (𝜑 → (𝐸 ∪ 𝐹) ∈ V)
12 elpwg 4563 . . . 4 ((𝐸 ∪ 𝐹) ∈ V → ((𝐸 ∪ 𝐹) ∈ 𝒫 ∪ dom 𝑂 ↔ (𝐸 ∪ 𝐹) ⊆ ∪ dom 𝑂))
1311, 12syl 18 . . 3 (𝜑 → ((𝐸 ∪ 𝐹) ∈ 𝒫 ∪ dom 𝑂 ↔ (𝐸 ∪ 𝐹) ⊆ ∪ dom 𝑂))
148, 13mpbird 260 . 2 (𝜑 → (𝐸 ∪ 𝐹) ∈ 𝒫 ∪ dom 𝑂)
151adantr 486 . . 3 ((𝜑 ∧ 𝑎 ∈ 𝒫 ∪ dom 𝑂) → 𝑂 ∈ OutMeas)
164adantr 486 . . 3 ((𝜑 ∧ 𝑎 ∈ 𝒫 ∪ dom 𝑂) → 𝐸 ∈ 𝑆)
176adantr 486 . . 3 ((𝜑 ∧ 𝑎 ∈ 𝒫 ∪ dom 𝑂) → 𝐹 ∈ 𝑆)
18 elpwi 4567 . . . 4 (𝑎 ∈ 𝒫 ∪ dom 𝑂 → 𝑎 ⊆ ∪ dom 𝑂)
1918adantl 487 . . 3 ((𝜑 ∧ 𝑎 ∈ 𝒫 ∪ dom 𝑂) → 𝑎 ⊆ ∪ dom 𝑂)
2015, 3, 16, 17, 2, 19caragenuncllem 47727 . 2 ((𝜑 ∧ 𝑎 ∈ 𝒫 ∪ dom 𝑂) → ((𝑂‘(𝑎 ∩ (𝐸 ∪ 𝐹))) +e (𝑂‘(𝑎 ∖ (𝐸 ∪ 𝐹)))) = (𝑂‘𝑎))
211, 2, 3, 14, 20carageneld 47717 1 (𝜑 → (𝐸 ∪ 𝐹) ∈ 𝑆)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ↔ wb 209   ∧ wa 401   = wceq 1570   ∈ wcel 2147  Vcvv 3454   ⊆ wss 3900   ∪ cun 4152  𝒫 cpw 4560  ∪ cuni 4870  dom cdm 5655  ‘cfv 6558  OutMeascome 47704  CaraGenccaragen 47706
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1945  ax-6 2002  ax-7 2043  ax-8 2149  ax-9 2157  ax-10 2180  ax-11 2197  ax-12 2216  ax-ext 2735  ax-sep 5252  ax-nul 5263  ax-pow 5331  ax-pr 5395  ax-un 7775  ax-cnex 11283  ax-resscn 11284  ax-1cn 11285  ax-icn 11286  ax-addcl 11287  ax-addrcl 11288  ax-mulcl 11289  ax-addass 11292  ax-i2m1 11295  ax-rnegex 11298  ax-cnre 11300  ax-pre-lttri 11301  ax-pre-lttrn 11302
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3or 1104  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2102  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2839  df-nfc 2913  df-ne 2960  df-nel 3066  df-ral 3081  df-rex 3091  df-rab 3417  df-v 3456  df-sbc 3743  df-csb 3852  df-ss 3901  df-dif 4050  df-in 4094  df-un 4154  df-nul 4282  df-if 4486  df-pw 4562  df-sn 4589  df-pr 4591  df-op 4839  df-uni 4871  df-iun 4956  df-br 5107  df-opab 5171  df-mpt 5190  df-id 5550  df-po 5563  df-so 5564  df-xp 5661  df-rel 5662  df-cnv 5663  df-co 5664  df-dm 5665  df-rn 5666  df-res 5667  df-ima 5668  df-iota 6512  df-fun 6560  df-fn 6561  df-f 6562  df-f1 6563  df-fo 6564  df-f1o 6565  df-fv 6566  df-ov 7446  df-oprab 7447  df-mpo 7448  df-1st 8025  df-2nd 8026  df-er 8745  df-en 9002  df-dom 9003  df-sdom 9004  df-pnf 11372  df-mnf 11373  df-xr 11374  df-ltxr 11375  df-le 11376  df-xadd 13269  df-icc 13510  df-ome 47705  df-caragen 47707
This theorem is used by:  caragenfiiuncl  47730
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