Theorem saliuncl 41326

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 3175	. . 3 ⊢ (𝜑 → ∀𝑘 ∈ 𝐾 𝐸 ∈ 𝑆)
3		dfiun3g 5611	. . 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 2825	. . . . . 6 ⊢ (𝑘 ∈ 𝐾 ↦ 𝐸) = (𝑘 ∈ 𝐾 ↦ 𝐸)
7	6	rnmptss 6641	. . . . 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 5030	. . . . 5 ⊢ (𝜑 → ran (𝑘 ∈ 𝐾 ↦ 𝐸) ∈ V)
10		elpwg 4386	. . . . 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 249	. . 3 ⊢ (𝜑 → ran (𝑘 ∈ 𝐾 ↦ 𝐸) ∈ 𝒫 𝑆)
13		saliuncl.kct	. . . 4 ⊢ (𝜑 → 𝐾 ≼ ω)
14		1stcrestlem 21626	. . . 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 41320	. 2 ⊢ (𝜑 → ∪ ran (𝑘 ∈ 𝐾 ↦ 𝐸) ∈ 𝑆)
17	4, 16	eqeltrd 2906	1 ⊢ (𝜑 → ∪ 𝑘 ∈ 𝐾 𝐸 ∈ 𝑆)

Syntax hints:   → wi 4   ↔ wb 198   ∧ wa 386   = wceq 1656   ∈ wcel 2164  ∀wral 3117  Vcvv 3414   ⊆ wss 3798  𝒫 cpw 4378  ∪ cuni 4658  ∪ ciun 4740   class class class wbr 4873   ↦ cmpt 4952  ran crn 5343  ωcom 7326   ≼ cdom 8220  SAlgcsalg 41312

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1894  ax-4 1908  ax-5 2009  ax-6 2075  ax-7 2112  ax-8 2166  ax-9 2173  ax-10 2192  ax-11 2207  ax-12 2220  ax-13 2389  ax-ext 2803  ax-rep 4994  ax-sep 5005  ax-nul 5013  ax-pow 5065  ax-pr 5127  ax-un 7209

This theorem depends on definitions:  df-bi 199  df-an 387  df-or 879  df-3or 1112  df-3an 1113  df-tru 1660  df-ex 1879  df-nf 1883  df-sb 2068  df-mo 2605  df-eu 2640  df-clab 2812  df-cleq 2818  df-clel 2821  df-nfc 2958  df-ne 3000  df-ral 3122  df-rex 3123  df-reu 3124  df-rmo 3125  df-rab 3126  df-v 3416  df-sbc 3663  df-csb 3758  df-dif 3801  df-un 3803  df-in 3805  df-ss 3812  df-pss 3814  df-nul 4145  df-if 4307  df-pw 4380  df-sn 4398  df-pr 4400  df-tp 4402  df-op 4404  df-uni 4659  df-int 4698  df-iun 4742  df-br 4874  df-opab 4936  df-mpt 4953  df-tr 4976  df-id 5250  df-eprel 5255  df-po 5263  df-so 5264  df-fr 5301  df-se 5302  df-we 5303  df-xp 5348  df-rel 5349  df-cnv 5350  df-co 5351  df-dm 5352  df-rn 5353  df-res 5354  df-ima 5355  df-pred 5920  df-ord 5966  df-on 5967  df-lim 5968  df-suc 5969  df-iota 6086  df-fun 6125  df-fn 6126  df-f 6127  df-f1 6128  df-fo 6129  df-f1o 6130  df-fv 6131  df-isom 6132  df-riota 6866  df-ov 6908  df-oprab 6909  df-mpt2 6910  df-om 7327  df-1st 7428  df-2nd 7429  df-wrecs 7672  df-recs 7734  df-er 8009  df-map 8124  df-en 8223  df-dom 8224  df-card 9078  df-acn 9081  df-salg 41313

This theorem is referenced by:  saliincl  41329  subsaliuncl  41360  meaiunlelem  41469  meaiuninclem  41481  meaiuninc3v  41485  meaiininclem  41487  caratheodory  41529  opnvonmbllem2  41634  ctvonmbl  41690  vonct  41694  smfaddlem2  41759  smflimlem1  41766  smfresal  41782  smfmullem4  41788