Theorem saliuncl 42601

Description: SAlg sigma-algebra is closed under countable indexed union. (Contributed by Glauco Siliprandi, 17-Aug-2020.)

Hypotheses

Ref	Expression
saliuncl.s	⊢ (𝜑 → 𝑆 ∈ SAlg)
saliuncl.kct	⊢ (𝜑 → 𝐾 ≼ ω)
saliuncl.b	⊢ ((𝜑 ∧ 𝑘 ∈ 𝐾) → 𝐸 ∈ 𝑆)

Assertion

Ref	Expression
saliuncl	⊢ (𝜑 → ∪ 𝑘 ∈ 𝐾 𝐸 ∈ 𝑆)

Distinct variable groups:   𝑘,𝐾   𝑆,𝑘   𝜑,𝑘

Allowed substitution hint:   𝐸(𝑘)

Proof of Theorem saliuncl

Step	Hyp	Ref	Expression
1		saliuncl.b	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐾) → 𝐸 ∈ 𝑆)
2	1	ralrimiva 3182	. . 3 ⊢ (𝜑 → ∀𝑘 ∈ 𝐾 𝐸 ∈ 𝑆)
3		dfiun3g 5829	. . 3 ⊢ (∀𝑘 ∈ 𝐾 𝐸 ∈ 𝑆 → ∪ 𝑘 ∈ 𝐾 𝐸 = ∪ ran (𝑘 ∈ 𝐾 ↦ 𝐸))
4	2, 3	syl 17	. 2 ⊢ (𝜑 → ∪ 𝑘 ∈ 𝐾 𝐸 = ∪ ran (𝑘 ∈ 𝐾 ↦ 𝐸))
5		saliuncl.s	. . 3 ⊢ (𝜑 → 𝑆 ∈ SAlg)
6		eqid 2821	. . . . . 6 ⊢ (𝑘 ∈ 𝐾 ↦ 𝐸) = (𝑘 ∈ 𝐾 ↦ 𝐸)
7	6	rnmptss 6880	. . . . 5 ⊢ (∀𝑘 ∈ 𝐾 𝐸 ∈ 𝑆 → ran (𝑘 ∈ 𝐾 ↦ 𝐸) ⊆ 𝑆)
8	2, 7	syl 17	. . . 4 ⊢ (𝜑 → ran (𝑘 ∈ 𝐾 ↦ 𝐸) ⊆ 𝑆)
9	5, 8	ssexd 5220	. . . . 5 ⊢ (𝜑 → ran (𝑘 ∈ 𝐾 ↦ 𝐸) ∈ V)
10		elpwg 4544	. . . . 5 ⊢ (ran (𝑘 ∈ 𝐾 ↦ 𝐸) ∈ V → (ran (𝑘 ∈ 𝐾 ↦ 𝐸) ∈ 𝒫 𝑆 ↔ ran (𝑘 ∈ 𝐾 ↦ 𝐸) ⊆ 𝑆))
11	9, 10	syl 17	. . . 4 ⊢ (𝜑 → (ran (𝑘 ∈ 𝐾 ↦ 𝐸) ∈ 𝒫 𝑆 ↔ ran (𝑘 ∈ 𝐾 ↦ 𝐸) ⊆ 𝑆))
12	8, 11	mpbird 259	. . 3 ⊢ (𝜑 → ran (𝑘 ∈ 𝐾 ↦ 𝐸) ∈ 𝒫 𝑆)
13		saliuncl.kct	. . . 4 ⊢ (𝜑 → 𝐾 ≼ ω)
14		1stcrestlem 22054	. . . 4 ⊢ (𝐾 ≼ ω → ran (𝑘 ∈ 𝐾 ↦ 𝐸) ≼ ω)
15	13, 14	syl 17	. . 3 ⊢ (𝜑 → ran (𝑘 ∈ 𝐾 ↦ 𝐸) ≼ ω)
16	5, 12, 15	salunicl 42595	. 2 ⊢ (𝜑 → ∪ ran (𝑘 ∈ 𝐾 ↦ 𝐸) ∈ 𝑆)
17	4, 16	eqeltrd 2913	1 ⊢ (𝜑 → ∪ 𝑘 ∈ 𝐾 𝐸 ∈ 𝑆)

Syntax hints:   → wi 4   ↔ wb 208   ∧ wa 398   = wceq 1533   ∈ wcel 2110  ∀wral 3138  Vcvv 3494   ⊆ wss 3935  𝒫 cpw 4538  ∪ cuni 4831  ∪ ciun 4911   class class class wbr 5058   ↦ cmpt 5138  ran crn 5550  ωcom 7574   ≼ cdom 8501  SAlgcsalg 42587

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

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3or 1084  df-3an 1085  df-tru 1536  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-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-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-om 7575  df-1st 7683  df-2nd 7684  df-wrecs 7941  df-recs 8002  df-er 8283  df-map 8402  df-en 8504  df-dom 8505  df-card 9362  df-acn 9365  df-salg 42588

This theorem is referenced by:  saliincl  42604  subsaliuncl  42635  meaiunlelem  42744  meaiuninclem  42756  meaiuninc3v  42760  meaiininclem  42762  caratheodory  42804  opnvonmbllem2  42909  ctvonmbl  42965  vonct  42969  smfaddlem2  43034  smflimlem1  43041  smfresal  43057  smfmullem4  43063