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Theorem elpwiuncl 29359
Description: Closure of indexed union with regard to elementhood to a power set. (Contributed by Thierry Arnoux, 27-May-2020.)
Hypotheses
Ref Expression
elpwiuncl.1 (𝜑𝐴𝑉)
elpwiuncl.2 ((𝜑𝑘𝐴) → 𝐵 ∈ 𝒫 𝐶)
Assertion
Ref Expression
elpwiuncl (𝜑 𝑘𝐴 𝐵 ∈ 𝒫 𝐶)
Distinct variable groups:   𝐴,𝑘   𝐶,𝑘   𝜑,𝑘
Allowed substitution hints:   𝐵(𝑘)   𝑉(𝑘)

Proof of Theorem elpwiuncl
StepHypRef Expression
1 elpwiuncl.2 . . . . 5 ((𝜑𝑘𝐴) → 𝐵 ∈ 𝒫 𝐶)
21elpwid 4170 . . . 4 ((𝜑𝑘𝐴) → 𝐵𝐶)
32ralrimiva 2966 . . 3 (𝜑 → ∀𝑘𝐴 𝐵𝐶)
4 iunss 4561 . . 3 ( 𝑘𝐴 𝐵𝐶 ↔ ∀𝑘𝐴 𝐵𝐶)
53, 4sylibr 224 . 2 (𝜑 𝑘𝐴 𝐵𝐶)
6 elpwiuncl.1 . . . 4 (𝜑𝐴𝑉)
71ralrimiva 2966 . . . 4 (𝜑 → ∀𝑘𝐴 𝐵 ∈ 𝒫 𝐶)
86, 7jca 554 . . 3 (𝜑 → (𝐴𝑉 ∧ ∀𝑘𝐴 𝐵 ∈ 𝒫 𝐶))
9 iunexg 7143 . . 3 ((𝐴𝑉 ∧ ∀𝑘𝐴 𝐵 ∈ 𝒫 𝐶) → 𝑘𝐴 𝐵 ∈ V)
10 elpwg 4166 . . 3 ( 𝑘𝐴 𝐵 ∈ V → ( 𝑘𝐴 𝐵 ∈ 𝒫 𝐶 𝑘𝐴 𝐵𝐶))
118, 9, 103syl 18 . 2 (𝜑 → ( 𝑘𝐴 𝐵 ∈ 𝒫 𝐶 𝑘𝐴 𝐵𝐶))
125, 11mpbird 247 1 (𝜑 𝑘𝐴 𝐵 ∈ 𝒫 𝐶)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 384  wcel 1990  wral 2912  Vcvv 3200  wss 3574  𝒫 cpw 4158   ciun 4520
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pr 4906  ax-un 6949
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-ral 2917  df-rex 2918  df-reu 2919  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-op 4184  df-uni 4437  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-id 5024  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896
This theorem is referenced by:  carsggect  30380  carsgclctunlem2  30381
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