Mathbox for Glauco Siliprandi < Previous   Next > Nearby theorems Mirrors  >  Home  >  MPE Home  >  Th. List  >   Mathboxes  >  subsaliuncl Structured version   Visualization version   GIF version

Theorem subsaliuncl 39252
 Description: A subspace sigma-algebra is closed under countable union. This is Lemma 121A (iii) of [Fremlin1] p. 35. (Contributed by Glauco Siliprandi, 26-Jun-2021.)
Hypotheses
Ref Expression
subsaliuncl.1 (𝜑𝑆 ∈ SAlg)
subsaliuncl.2 (𝜑𝐷𝑉)
subsaliuncl.3 𝑇 = (𝑆t 𝐷)
subsaliuncl.4 (𝜑𝐹:ℕ⟶𝑇)
Assertion
Ref Expression
subsaliuncl (𝜑 𝑛 ∈ ℕ (𝐹𝑛) ∈ 𝑇)
Distinct variable groups:   𝐷,𝑛   𝑛,𝐹   𝑆,𝑛   𝜑,𝑛
Allowed substitution hints:   𝑇(𝑛)   𝑉(𝑛)

Proof of Theorem subsaliuncl
Dummy variables 𝑒 𝑓 𝑧 𝑚 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 eqid 2610 . . . . . . . . 9 {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)} = {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}
2 subsaliuncl.1 . . . . . . . . 9 (𝜑𝑆 ∈ SAlg)
31, 2rabexd 4741 . . . . . . . 8 (𝜑 → {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)} ∈ V)
43ralrimivw 2950 . . . . . . 7 (𝜑 → ∀𝑛 ∈ ℕ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)} ∈ V)
5 eqid 2610 . . . . . . . 8 (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) = (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})
65fnmpt 5933 . . . . . . 7 (∀𝑛 ∈ ℕ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)} ∈ V → (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) Fn ℕ)
74, 6syl 17 . . . . . 6 (𝜑 → (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) Fn ℕ)
8 nnex 10903 . . . . . . 7 ℕ ∈ V
9 fnrndomg 9239 . . . . . . 7 (ℕ ∈ V → ((𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) Fn ℕ → ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) ≼ ℕ))
108, 9ax-mp 5 . . . . . 6 ((𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) Fn ℕ → ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) ≼ ℕ)
117, 10syl 17 . . . . 5 (𝜑 → ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) ≼ ℕ)
12 nnenom 12641 . . . . . 6 ℕ ≈ ω
1312a1i 11 . . . . 5 (𝜑 → ℕ ≈ ω)
14 domentr 7901 . . . . 5 ((ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) ≼ ℕ ∧ ℕ ≈ ω) → ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) ≼ ω)
1511, 13, 14syl2anc 691 . . . 4 (𝜑 → ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) ≼ ω)
16 vex 3176 . . . . . . . 8 𝑦 ∈ V
175elrnmpt 5293 . . . . . . . 8 (𝑦 ∈ V → (𝑦 ∈ ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) ↔ ∃𝑛 ∈ ℕ 𝑦 = {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}))
1816, 17ax-mp 5 . . . . . . 7 (𝑦 ∈ ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) ↔ ∃𝑛 ∈ ℕ 𝑦 = {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})
1918biimpi 205 . . . . . 6 (𝑦 ∈ ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) → ∃𝑛 ∈ ℕ 𝑦 = {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})
2019adantl 481 . . . . 5 ((𝜑𝑦 ∈ ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})) → ∃𝑛 ∈ ℕ 𝑦 = {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})
21 simp3 1056 . . . . . . . . 9 ((𝜑𝑛 ∈ ℕ ∧ 𝑦 = {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) → 𝑦 = {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})
22 subsaliuncl.4 . . . . . . . . . . . . . 14 (𝜑𝐹:ℕ⟶𝑇)
2322ffvelrnda 6267 . . . . . . . . . . . . 13 ((𝜑𝑛 ∈ ℕ) → (𝐹𝑛) ∈ 𝑇)
24 subsaliuncl.3 . . . . . . . . . . . . 13 𝑇 = (𝑆t 𝐷)
2523, 24syl6eleq 2698 . . . . . . . . . . . 12 ((𝜑𝑛 ∈ ℕ) → (𝐹𝑛) ∈ (𝑆t 𝐷))
26 subsaliuncl.2 . . . . . . . . . . . . . . 15 (𝜑𝐷𝑉)
2726elexd 3187 . . . . . . . . . . . . . 14 (𝜑𝐷 ∈ V)
28 elrest 15911 . . . . . . . . . . . . . 14 ((𝑆 ∈ SAlg ∧ 𝐷 ∈ V) → ((𝐹𝑛) ∈ (𝑆t 𝐷) ↔ ∃𝑥𝑆 (𝐹𝑛) = (𝑥𝐷)))
292, 27, 28syl2anc 691 . . . . . . . . . . . . 13 (𝜑 → ((𝐹𝑛) ∈ (𝑆t 𝐷) ↔ ∃𝑥𝑆 (𝐹𝑛) = (𝑥𝐷)))
3029adantr 480 . . . . . . . . . . . 12 ((𝜑𝑛 ∈ ℕ) → ((𝐹𝑛) ∈ (𝑆t 𝐷) ↔ ∃𝑥𝑆 (𝐹𝑛) = (𝑥𝐷)))
3125, 30mpbid 221 . . . . . . . . . . 11 ((𝜑𝑛 ∈ ℕ) → ∃𝑥𝑆 (𝐹𝑛) = (𝑥𝐷))
32 rabn0 3912 . . . . . . . . . . 11 ({𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)} ≠ ∅ ↔ ∃𝑥𝑆 (𝐹𝑛) = (𝑥𝐷))
3331, 32sylibr 223 . . . . . . . . . 10 ((𝜑𝑛 ∈ ℕ) → {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)} ≠ ∅)
34333adant3 1074 . . . . . . . . 9 ((𝜑𝑛 ∈ ℕ ∧ 𝑦 = {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) → {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)} ≠ ∅)
3521, 34eqnetrd 2849 . . . . . . . 8 ((𝜑𝑛 ∈ ℕ ∧ 𝑦 = {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) → 𝑦 ≠ ∅)
36353exp 1256 . . . . . . 7 (𝜑 → (𝑛 ∈ ℕ → (𝑦 = {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)} → 𝑦 ≠ ∅)))
3736rexlimdv 3012 . . . . . 6 (𝜑 → (∃𝑛 ∈ ℕ 𝑦 = {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)} → 𝑦 ≠ ∅))
3837adantr 480 . . . . 5 ((𝜑𝑦 ∈ ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})) → (∃𝑛 ∈ ℕ 𝑦 = {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)} → 𝑦 ≠ ∅))
3920, 38mpd 15 . . . 4 ((𝜑𝑦 ∈ ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})) → 𝑦 ≠ ∅)
4015, 39axccdom 38411 . . 3 (𝜑 → ∃𝑓(𝑓 Fn ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) ∧ ∀𝑦 ∈ ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦))
41 simpl 472 . . . . . 6 ((𝜑 ∧ (𝑓 Fn ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) ∧ ∀𝑦 ∈ ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦)) → 𝜑)
42 fveq2 6103 . . . . . . . . . . . . 13 (𝑛 = 𝑚 → (𝐹𝑛) = (𝐹𝑚))
4342eqeq1d 2612 . . . . . . . . . . . 12 (𝑛 = 𝑚 → ((𝐹𝑛) = (𝑥𝐷) ↔ (𝐹𝑚) = (𝑥𝐷)))
4443rabbidv 3164 . . . . . . . . . . 11 (𝑛 = 𝑚 → {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)} = {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)})
4544cbvmptv 4678 . . . . . . . . . 10 (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) = (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)})
4645rneqi 5273 . . . . . . . . 9 ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) = ran (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)})
4746fneq2i 5900 . . . . . . . 8 (𝑓 Fn ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) ↔ 𝑓 Fn ran (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)}))
4847biimpi 205 . . . . . . 7 (𝑓 Fn ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) → 𝑓 Fn ran (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)}))
4948ad2antrl 760 . . . . . 6 ((𝜑 ∧ (𝑓 Fn ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) ∧ ∀𝑦 ∈ ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦)) → 𝑓 Fn ran (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)}))
5046raleqi 3119 . . . . . . . . 9 (∀𝑦 ∈ ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦 ↔ ∀𝑦 ∈ ran (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦)
5150biimpi 205 . . . . . . . 8 (∀𝑦 ∈ ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦 → ∀𝑦 ∈ ran (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦)
5251adantl 481 . . . . . . 7 ((𝜑 ∧ ∀𝑦 ∈ ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦) → ∀𝑦 ∈ ran (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦)
5352adantrl 748 . . . . . 6 ((𝜑 ∧ (𝑓 Fn ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) ∧ ∀𝑦 ∈ ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦)) → ∀𝑦 ∈ ran (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦)
54 nfv 1830 . . . . . . 7 𝑧(𝜑𝑓 Fn ran (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)}) ∧ ∀𝑦 ∈ ran (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦)
5523ad2ant1 1075 . . . . . . 7 ((𝜑𝑓 Fn ran (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)}) ∧ ∀𝑦 ∈ ran (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦) → 𝑆 ∈ SAlg)
56 ineq1 3769 . . . . . . . . . . . 12 (𝑥 = 𝑧 → (𝑥𝐷) = (𝑧𝐷))
5756eqeq2d 2620 . . . . . . . . . . 11 (𝑥 = 𝑧 → ((𝐹𝑚) = (𝑥𝐷) ↔ (𝐹𝑚) = (𝑧𝐷)))
5857cbvrabv 3172 . . . . . . . . . 10 {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)} = {𝑧𝑆 ∣ (𝐹𝑚) = (𝑧𝐷)}
5958mpteq2i 4669 . . . . . . . . 9 (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)}) = (𝑚 ∈ ℕ ↦ {𝑧𝑆 ∣ (𝐹𝑚) = (𝑧𝐷)})
6045, 59eqtr2i 2633 . . . . . . . 8 (𝑚 ∈ ℕ ↦ {𝑧𝑆 ∣ (𝐹𝑚) = (𝑧𝐷)}) = (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})
6160coeq2i 5204 . . . . . . 7 (𝑓 ∘ (𝑚 ∈ ℕ ↦ {𝑧𝑆 ∣ (𝐹𝑚) = (𝑧𝐷)})) = (𝑓 ∘ (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}))
6247biimpri 217 . . . . . . . 8 (𝑓 Fn ran (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)}) → 𝑓 Fn ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}))
63623ad2ant2 1076 . . . . . . 7 ((𝜑𝑓 Fn ran (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)}) ∧ ∀𝑦 ∈ ran (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦) → 𝑓 Fn ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}))
6446eqcomi 2619 . . . . . . . . . . 11 ran (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)}) = ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})
6564raleqi 3119 . . . . . . . . . 10 (∀𝑦 ∈ ran (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦 ↔ ∀𝑦 ∈ ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦)
66 fveq2 6103 . . . . . . . . . . . 12 (𝑦 = 𝑧 → (𝑓𝑦) = (𝑓𝑧))
67 id 22 . . . . . . . . . . . 12 (𝑦 = 𝑧𝑦 = 𝑧)
6866, 67eleq12d 2682 . . . . . . . . . . 11 (𝑦 = 𝑧 → ((𝑓𝑦) ∈ 𝑦 ↔ (𝑓𝑧) ∈ 𝑧))
6968cbvralv 3147 . . . . . . . . . 10 (∀𝑦 ∈ ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦 ↔ ∀𝑧 ∈ ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})(𝑓𝑧) ∈ 𝑧)
7065, 69bitri 263 . . . . . . . . 9 (∀𝑦 ∈ ran (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦 ↔ ∀𝑧 ∈ ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})(𝑓𝑧) ∈ 𝑧)
7170biimpi 205 . . . . . . . 8 (∀𝑦 ∈ ran (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦 → ∀𝑧 ∈ ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})(𝑓𝑧) ∈ 𝑧)
72713ad2ant3 1077 . . . . . . 7 ((𝜑𝑓 Fn ran (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)}) ∧ ∀𝑦 ∈ ran (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦) → ∀𝑧 ∈ ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})(𝑓𝑧) ∈ 𝑧)
7354, 55, 5, 61, 63, 72subsaliuncllem 39251 . . . . . 6 ((𝜑𝑓 Fn ran (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)}) ∧ ∀𝑦 ∈ ran (𝑚 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑚) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦) → ∃𝑒 ∈ (𝑆𝑚 ℕ)∀𝑛 ∈ ℕ (𝐹𝑛) = ((𝑒𝑛) ∩ 𝐷))
7441, 49, 53, 73syl3anc 1318 . . . . 5 ((𝜑 ∧ (𝑓 Fn ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) ∧ ∀𝑦 ∈ ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦)) → ∃𝑒 ∈ (𝑆𝑚 ℕ)∀𝑛 ∈ ℕ (𝐹𝑛) = ((𝑒𝑛) ∩ 𝐷))
7574ex 449 . . . 4 (𝜑 → ((𝑓 Fn ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) ∧ ∀𝑦 ∈ ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦) → ∃𝑒 ∈ (𝑆𝑚 ℕ)∀𝑛 ∈ ℕ (𝐹𝑛) = ((𝑒𝑛) ∩ 𝐷)))
7675exlimdv 1848 . . 3 (𝜑 → (∃𝑓(𝑓 Fn ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)}) ∧ ∀𝑦 ∈ ran (𝑛 ∈ ℕ ↦ {𝑥𝑆 ∣ (𝐹𝑛) = (𝑥𝐷)})(𝑓𝑦) ∈ 𝑦) → ∃𝑒 ∈ (𝑆𝑚 ℕ)∀𝑛 ∈ ℕ (𝐹𝑛) = ((𝑒𝑛) ∩ 𝐷)))
7740, 76mpd 15 . 2 (𝜑 → ∃𝑒 ∈ (𝑆𝑚 ℕ)∀𝑛 ∈ ℕ (𝐹𝑛) = ((𝑒𝑛) ∩ 𝐷))
7823ad2ant1 1075 . . . . . 6 ((𝜑𝑒 ∈ (𝑆𝑚 ℕ) ∧ ∀𝑛 ∈ ℕ (𝐹𝑛) = ((𝑒𝑛) ∩ 𝐷)) → 𝑆 ∈ SAlg)
79273ad2ant1 1075 . . . . . 6 ((𝜑𝑒 ∈ (𝑆𝑚 ℕ) ∧ ∀𝑛 ∈ ℕ (𝐹𝑛) = ((𝑒𝑛) ∩ 𝐷)) → 𝐷 ∈ V)
802adantr 480 . . . . . . . 8 ((𝜑𝑒 ∈ (𝑆𝑚 ℕ)) → 𝑆 ∈ SAlg)
81 nnct 12642 . . . . . . . . 9 ℕ ≼ ω
8281a1i 11 . . . . . . . 8 ((𝜑𝑒 ∈ (𝑆𝑚 ℕ)) → ℕ ≼ ω)
83 elmapi 7765 . . . . . . . . . 10 (𝑒 ∈ (𝑆𝑚 ℕ) → 𝑒:ℕ⟶𝑆)
8483adantl 481 . . . . . . . . 9 ((𝜑𝑒 ∈ (𝑆𝑚 ℕ)) → 𝑒:ℕ⟶𝑆)
8584ffvelrnda 6267 . . . . . . . 8 (((𝜑𝑒 ∈ (𝑆𝑚 ℕ)) ∧ 𝑛 ∈ ℕ) → (𝑒𝑛) ∈ 𝑆)
8680, 82, 85saliuncl 39218 . . . . . . 7 ((𝜑𝑒 ∈ (𝑆𝑚 ℕ)) → 𝑛 ∈ ℕ (𝑒𝑛) ∈ 𝑆)
87863adant3 1074 . . . . . 6 ((𝜑𝑒 ∈ (𝑆𝑚 ℕ) ∧ ∀𝑛 ∈ ℕ (𝐹𝑛) = ((𝑒𝑛) ∩ 𝐷)) → 𝑛 ∈ ℕ (𝑒𝑛) ∈ 𝑆)
88 eqid 2610 . . . . . 6 ( 𝑛 ∈ ℕ (𝑒𝑛) ∩ 𝐷) = ( 𝑛 ∈ ℕ (𝑒𝑛) ∩ 𝐷)
8978, 79, 87, 88elrestd 38322 . . . . 5 ((𝜑𝑒 ∈ (𝑆𝑚 ℕ) ∧ ∀𝑛 ∈ ℕ (𝐹𝑛) = ((𝑒𝑛) ∩ 𝐷)) → ( 𝑛 ∈ ℕ (𝑒𝑛) ∩ 𝐷) ∈ (𝑆t 𝐷))
90 nfra1 2925 . . . . . . . . 9 𝑛𝑛 ∈ ℕ (𝐹𝑛) = ((𝑒𝑛) ∩ 𝐷)
91 rspa 2914 . . . . . . . . 9 ((∀𝑛 ∈ ℕ (𝐹𝑛) = ((𝑒𝑛) ∩ 𝐷) ∧ 𝑛 ∈ ℕ) → (𝐹𝑛) = ((𝑒𝑛) ∩ 𝐷))
9290, 91iuneq2df 38237 . . . . . . . 8 (∀𝑛 ∈ ℕ (𝐹𝑛) = ((𝑒𝑛) ∩ 𝐷) → 𝑛 ∈ ℕ (𝐹𝑛) = 𝑛 ∈ ℕ ((𝑒𝑛) ∩ 𝐷))
93 iunin1 4521 . . . . . . . . 9 𝑛 ∈ ℕ ((𝑒𝑛) ∩ 𝐷) = ( 𝑛 ∈ ℕ (𝑒𝑛) ∩ 𝐷)
9493a1i 11 . . . . . . . 8 (∀𝑛 ∈ ℕ (𝐹𝑛) = ((𝑒𝑛) ∩ 𝐷) → 𝑛 ∈ ℕ ((𝑒𝑛) ∩ 𝐷) = ( 𝑛 ∈ ℕ (𝑒𝑛) ∩ 𝐷))
9592, 94eqtrd 2644 . . . . . . 7 (∀𝑛 ∈ ℕ (𝐹𝑛) = ((𝑒𝑛) ∩ 𝐷) → 𝑛 ∈ ℕ (𝐹𝑛) = ( 𝑛 ∈ ℕ (𝑒𝑛) ∩ 𝐷))
96953ad2ant3 1077 . . . . . 6 ((𝜑𝑒 ∈ (𝑆𝑚 ℕ) ∧ ∀𝑛 ∈ ℕ (𝐹𝑛) = ((𝑒𝑛) ∩ 𝐷)) → 𝑛 ∈ ℕ (𝐹𝑛) = ( 𝑛 ∈ ℕ (𝑒𝑛) ∩ 𝐷))
9724a1i 11 . . . . . 6 ((𝜑𝑒 ∈ (𝑆𝑚 ℕ) ∧ ∀𝑛 ∈ ℕ (𝐹𝑛) = ((𝑒𝑛) ∩ 𝐷)) → 𝑇 = (𝑆t 𝐷))
9896, 97eleq12d 2682 . . . . 5 ((𝜑𝑒 ∈ (𝑆𝑚 ℕ) ∧ ∀𝑛 ∈ ℕ (𝐹𝑛) = ((𝑒𝑛) ∩ 𝐷)) → ( 𝑛 ∈ ℕ (𝐹𝑛) ∈ 𝑇 ↔ ( 𝑛 ∈ ℕ (𝑒𝑛) ∩ 𝐷) ∈ (𝑆t 𝐷)))
9989, 98mpbird 246 . . . 4 ((𝜑𝑒 ∈ (𝑆𝑚 ℕ) ∧ ∀𝑛 ∈ ℕ (𝐹𝑛) = ((𝑒𝑛) ∩ 𝐷)) → 𝑛 ∈ ℕ (𝐹𝑛) ∈ 𝑇)
100993exp 1256 . . 3 (𝜑 → (𝑒 ∈ (𝑆𝑚 ℕ) → (∀𝑛 ∈ ℕ (𝐹𝑛) = ((𝑒𝑛) ∩ 𝐷) → 𝑛 ∈ ℕ (𝐹𝑛) ∈ 𝑇)))
101100rexlimdv 3012 . 2 (𝜑 → (∃𝑒 ∈ (𝑆𝑚 ℕ)∀𝑛 ∈ ℕ (𝐹𝑛) = ((𝑒𝑛) ∩ 𝐷) → 𝑛 ∈ ℕ (𝐹𝑛) ∈ 𝑇))
10277, 101mpd 15 1 (𝜑 𝑛 ∈ ℕ (𝐹𝑛) ∈ 𝑇)
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ↔ wb 195   ∧ wa 383   ∧ w3a 1031   = wceq 1475  ∃wex 1695   ∈ wcel 1977   ≠ wne 2780  ∀wral 2896  ∃wrex 2897  {crab 2900  Vcvv 3173   ∩ cin 3539  ∅c0 3874  ∪ ciun 4455   class class class wbr 4583   ↦ cmpt 4643  ran crn 5039   ∘ ccom 5042   Fn wfn 5799  ⟶wf 5800  ‘cfv 5804  (class class class)co 6549  ωcom 6957   ↑𝑚 cmap 7744   ≈ cen 7838   ≼ cdom 7839  ℕcn 10897   ↾t crest 15904  SAlgcsalg 39204 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-rep 4699  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-inf2 8421  ax-cc 9140  ax-ac2 9168  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-mulcom 9879  ax-addass 9880  ax-mulass 9881  ax-distr 9882  ax-i2m1 9883  ax-1ne0 9884  ax-1rid 9885  ax-rnegex 9886  ax-rrecex 9887  ax-cnre 9888  ax-pre-lttri 9889  ax-pre-lttrn 9890  ax-pre-ltadd 9891  ax-pre-mulgt0 9892 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-reu 2903  df-rmo 2904  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-pss 3556  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-tp 4130  df-op 4132  df-uni 4373  df-int 4411  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-tr 4681  df-eprel 4949  df-id 4953  df-po 4959  df-so 4960  df-fr 4997  df-se 4998  df-we 4999  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-pred 5597  df-ord 5643  df-on 5644  df-lim 5645  df-suc 5646  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-isom 5813  df-riota 6511  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-om 6958  df-1st 7059  df-2nd 7060  df-wrecs 7294  df-recs 7355  df-rdg 7393  df-1o 7447  df-oadd 7451  df-er 7629  df-map 7746  df-en 7842  df-dom 7843  df-sdom 7844  df-fin 7845  df-card 8648  df-acn 8651  df-ac 8822  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-sub 10147  df-neg 10148  df-nn 10898  df-n0 11170  df-z 11255  df-uz 11564  df-rest 15906  df-salg 39205 This theorem is referenced by:  subsalsal  39253
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