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Theorem alexsubALTlem2 21775
 Description: Lemma for alexsubALT 21778. Every subset of a base which has no finite subcover is a subset of a maximal such collection. (Contributed by Jeff Hankins, 27-Jan-2010.)
Hypothesis
Ref Expression
alexsubALT.1 𝑋 = 𝐽
Assertion
Ref Expression
alexsubALTlem2 (((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) → ∃𝑢 ∈ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅})∀𝑣 ∈ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ¬ 𝑢𝑣)
Distinct variable groups:   𝑎,𝑏,𝑐,𝑑,𝑢,𝑣,𝑥,𝑧,𝐽   𝑋,𝑎,𝑏,𝑐,𝑑,𝑢,𝑣,𝑥,𝑧

Proof of Theorem alexsubALTlem2
Dummy variables 𝑛 𝑤 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 ssel 3581 . . . . . . . . . . . . 13 (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) → (𝑤𝑦𝑤 ∈ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅})))
2 elun 3736 . . . . . . . . . . . . . . 15 (𝑤 ∈ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ↔ (𝑤 ∈ {𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∨ 𝑤 ∈ {∅}))
3 sseq2 3611 . . . . . . . . . . . . . . . . . 18 (𝑧 = 𝑤 → (𝑎𝑧𝑎𝑤))
4 pweq 4138 . . . . . . . . . . . . . . . . . . . 20 (𝑧 = 𝑤 → 𝒫 𝑧 = 𝒫 𝑤)
54ineq1d 3796 . . . . . . . . . . . . . . . . . . 19 (𝑧 = 𝑤 → (𝒫 𝑧 ∩ Fin) = (𝒫 𝑤 ∩ Fin))
65raleqdv 3136 . . . . . . . . . . . . . . . . . 18 (𝑧 = 𝑤 → (∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏 ↔ ∀𝑏 ∈ (𝒫 𝑤 ∩ Fin) ¬ 𝑋 = 𝑏))
73, 6anbi12d 746 . . . . . . . . . . . . . . . . 17 (𝑧 = 𝑤 → ((𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏) ↔ (𝑎𝑤 ∧ ∀𝑏 ∈ (𝒫 𝑤 ∩ Fin) ¬ 𝑋 = 𝑏)))
87elrab 3350 . . . . . . . . . . . . . . . 16 (𝑤 ∈ {𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ↔ (𝑤 ∈ 𝒫 (fi‘𝑥) ∧ (𝑎𝑤 ∧ ∀𝑏 ∈ (𝒫 𝑤 ∩ Fin) ¬ 𝑋 = 𝑏)))
9 velsn 4169 . . . . . . . . . . . . . . . 16 (𝑤 ∈ {∅} ↔ 𝑤 = ∅)
108, 9orbi12i 543 . . . . . . . . . . . . . . 15 ((𝑤 ∈ {𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∨ 𝑤 ∈ {∅}) ↔ ((𝑤 ∈ 𝒫 (fi‘𝑥) ∧ (𝑎𝑤 ∧ ∀𝑏 ∈ (𝒫 𝑤 ∩ Fin) ¬ 𝑋 = 𝑏)) ∨ 𝑤 = ∅))
112, 10bitri 264 . . . . . . . . . . . . . 14 (𝑤 ∈ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ↔ ((𝑤 ∈ 𝒫 (fi‘𝑥) ∧ (𝑎𝑤 ∧ ∀𝑏 ∈ (𝒫 𝑤 ∩ Fin) ¬ 𝑋 = 𝑏)) ∨ 𝑤 = ∅))
12 elpwi 4145 . . . . . . . . . . . . . . . 16 (𝑤 ∈ 𝒫 (fi‘𝑥) → 𝑤 ⊆ (fi‘𝑥))
1312adantr 481 . . . . . . . . . . . . . . 15 ((𝑤 ∈ 𝒫 (fi‘𝑥) ∧ (𝑎𝑤 ∧ ∀𝑏 ∈ (𝒫 𝑤 ∩ Fin) ¬ 𝑋 = 𝑏)) → 𝑤 ⊆ (fi‘𝑥))
14 0ss 3949 . . . . . . . . . . . . . . . 16 ∅ ⊆ (fi‘𝑥)
15 sseq1 3610 . . . . . . . . . . . . . . . 16 (𝑤 = ∅ → (𝑤 ⊆ (fi‘𝑥) ↔ ∅ ⊆ (fi‘𝑥)))
1614, 15mpbiri 248 . . . . . . . . . . . . . . 15 (𝑤 = ∅ → 𝑤 ⊆ (fi‘𝑥))
1713, 16jaoi 394 . . . . . . . . . . . . . 14 (((𝑤 ∈ 𝒫 (fi‘𝑥) ∧ (𝑎𝑤 ∧ ∀𝑏 ∈ (𝒫 𝑤 ∩ Fin) ¬ 𝑋 = 𝑏)) ∨ 𝑤 = ∅) → 𝑤 ⊆ (fi‘𝑥))
1811, 17sylbi 207 . . . . . . . . . . . . 13 (𝑤 ∈ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) → 𝑤 ⊆ (fi‘𝑥))
191, 18syl6 35 . . . . . . . . . . . 12 (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) → (𝑤𝑦𝑤 ⊆ (fi‘𝑥)))
2019ralrimiv 2960 . . . . . . . . . . 11 (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) → ∀𝑤𝑦 𝑤 ⊆ (fi‘𝑥))
21 unissb 4440 . . . . . . . . . . 11 ( 𝑦 ⊆ (fi‘𝑥) ↔ ∀𝑤𝑦 𝑤 ⊆ (fi‘𝑥))
2220, 21sylibr 224 . . . . . . . . . 10 (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) → 𝑦 ⊆ (fi‘𝑥))
2322adantr 481 . . . . . . . . 9 ((𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦) → 𝑦 ⊆ (fi‘𝑥))
2423ad2antlr 762 . . . . . . . 8 (((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) ∧ ¬ 𝑦 = ∅) → 𝑦 ⊆ (fi‘𝑥))
25 vuniex 6914 . . . . . . . . 9 𝑦 ∈ V
2625elpw 4141 . . . . . . . 8 ( 𝑦 ∈ 𝒫 (fi‘𝑥) ↔ 𝑦 ⊆ (fi‘𝑥))
2724, 26sylibr 224 . . . . . . 7 (((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) ∧ ¬ 𝑦 = ∅) → 𝑦 ∈ 𝒫 (fi‘𝑥))
28 uni0b 4434 . . . . . . . . . 10 ( 𝑦 = ∅ ↔ 𝑦 ⊆ {∅})
2928notbii 310 . . . . . . . . 9 𝑦 = ∅ ↔ ¬ 𝑦 ⊆ {∅})
30 disjssun 4013 . . . . . . . . . . . . 13 ((𝑦 ∩ {𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)}) = ∅ → (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ↔ 𝑦 ⊆ {∅}))
3130biimpcd 239 . . . . . . . . . . . 12 (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) → ((𝑦 ∩ {𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)}) = ∅ → 𝑦 ⊆ {∅}))
3231necon3bd 2804 . . . . . . . . . . 11 (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) → (¬ 𝑦 ⊆ {∅} → (𝑦 ∩ {𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)}) ≠ ∅))
33 n0 3912 . . . . . . . . . . . 12 ((𝑦 ∩ {𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)}) ≠ ∅ ↔ ∃𝑤 𝑤 ∈ (𝑦 ∩ {𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)}))
34 elin 3779 . . . . . . . . . . . . . . 15 (𝑤 ∈ (𝑦 ∩ {𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)}) ↔ (𝑤𝑦𝑤 ∈ {𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)}))
358anbi2i 729 . . . . . . . . . . . . . . 15 ((𝑤𝑦𝑤 ∈ {𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)}) ↔ (𝑤𝑦 ∧ (𝑤 ∈ 𝒫 (fi‘𝑥) ∧ (𝑎𝑤 ∧ ∀𝑏 ∈ (𝒫 𝑤 ∩ Fin) ¬ 𝑋 = 𝑏))))
3634, 35bitri 264 . . . . . . . . . . . . . 14 (𝑤 ∈ (𝑦 ∩ {𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)}) ↔ (𝑤𝑦 ∧ (𝑤 ∈ 𝒫 (fi‘𝑥) ∧ (𝑎𝑤 ∧ ∀𝑏 ∈ (𝒫 𝑤 ∩ Fin) ¬ 𝑋 = 𝑏))))
37 simprrl 803 . . . . . . . . . . . . . . 15 ((𝑤𝑦 ∧ (𝑤 ∈ 𝒫 (fi‘𝑥) ∧ (𝑎𝑤 ∧ ∀𝑏 ∈ (𝒫 𝑤 ∩ Fin) ¬ 𝑋 = 𝑏))) → 𝑎𝑤)
38 simpl 473 . . . . . . . . . . . . . . 15 ((𝑤𝑦 ∧ (𝑤 ∈ 𝒫 (fi‘𝑥) ∧ (𝑎𝑤 ∧ ∀𝑏 ∈ (𝒫 𝑤 ∩ Fin) ¬ 𝑋 = 𝑏))) → 𝑤𝑦)
39 ssuni 4430 . . . . . . . . . . . . . . 15 ((𝑎𝑤𝑤𝑦) → 𝑎 𝑦)
4037, 38, 39syl2anc 692 . . . . . . . . . . . . . 14 ((𝑤𝑦 ∧ (𝑤 ∈ 𝒫 (fi‘𝑥) ∧ (𝑎𝑤 ∧ ∀𝑏 ∈ (𝒫 𝑤 ∩ Fin) ¬ 𝑋 = 𝑏))) → 𝑎 𝑦)
4136, 40sylbi 207 . . . . . . . . . . . . 13 (𝑤 ∈ (𝑦 ∩ {𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)}) → 𝑎 𝑦)
4241exlimiv 1855 . . . . . . . . . . . 12 (∃𝑤 𝑤 ∈ (𝑦 ∩ {𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)}) → 𝑎 𝑦)
4333, 42sylbi 207 . . . . . . . . . . 11 ((𝑦 ∩ {𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)}) ≠ ∅ → 𝑎 𝑦)
4432, 43syl6 35 . . . . . . . . . 10 (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) → (¬ 𝑦 ⊆ {∅} → 𝑎 𝑦))
4544ad2antrl 763 . . . . . . . . 9 ((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) → (¬ 𝑦 ⊆ {∅} → 𝑎 𝑦))
4629, 45syl5bi 232 . . . . . . . 8 ((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) → (¬ 𝑦 = ∅ → 𝑎 𝑦))
4746imp 445 . . . . . . 7 (((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) ∧ ¬ 𝑦 = ∅) → 𝑎 𝑦)
48 elfpw 8220 . . . . . . . . . 10 (𝑛 ∈ (𝒫 𝑦 ∩ Fin) ↔ (𝑛 𝑦𝑛 ∈ Fin))
49 unieq 4415 . . . . . . . . . . . . . . . . . . . 20 (𝑦 = ∅ → 𝑦 = ∅)
50 uni0 4436 . . . . . . . . . . . . . . . . . . . 20 ∅ = ∅
5149, 50syl6eq 2671 . . . . . . . . . . . . . . . . . . 19 (𝑦 = ∅ → 𝑦 = ∅)
5251necon3bi 2816 . . . . . . . . . . . . . . . . . 18 𝑦 = ∅ → 𝑦 ≠ ∅)
5352adantr 481 . . . . . . . . . . . . . . . . 17 ((¬ 𝑦 = ∅ ∧ 𝑛 ∈ Fin) → 𝑦 ≠ ∅)
5453ad2antrl 763 . . . . . . . . . . . . . . . 16 (((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) ∧ ((¬ 𝑦 = ∅ ∧ 𝑛 ∈ Fin) ∧ 𝑛 𝑦)) → 𝑦 ≠ ∅)
55 simplrr 800 . . . . . . . . . . . . . . . 16 (((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) ∧ ((¬ 𝑦 = ∅ ∧ 𝑛 ∈ Fin) ∧ 𝑛 𝑦)) → [] Or 𝑦)
56 simprlr 802 . . . . . . . . . . . . . . . 16 (((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) ∧ ((¬ 𝑦 = ∅ ∧ 𝑛 ∈ Fin) ∧ 𝑛 𝑦)) → 𝑛 ∈ Fin)
57 simprr 795 . . . . . . . . . . . . . . . 16 (((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) ∧ ((¬ 𝑦 = ∅ ∧ 𝑛 ∈ Fin) ∧ 𝑛 𝑦)) → 𝑛 𝑦)
58 finsschain 8225 . . . . . . . . . . . . . . . 16 (((𝑦 ≠ ∅ ∧ [] Or 𝑦) ∧ (𝑛 ∈ Fin ∧ 𝑛 𝑦)) → ∃𝑤𝑦 𝑛𝑤)
5954, 55, 56, 57, 58syl22anc 1324 . . . . . . . . . . . . . . 15 (((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) ∧ ((¬ 𝑦 = ∅ ∧ 𝑛 ∈ Fin) ∧ 𝑛 𝑦)) → ∃𝑤𝑦 𝑛𝑤)
6059expr 642 . . . . . . . . . . . . . 14 (((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) ∧ (¬ 𝑦 = ∅ ∧ 𝑛 ∈ Fin)) → (𝑛 𝑦 → ∃𝑤𝑦 𝑛𝑤))
61 0elpw 4799 . . . . . . . . . . . . . . . . . . . . 21 ∅ ∈ 𝒫 𝑎
62 0fin 8140 . . . . . . . . . . . . . . . . . . . . 21 ∅ ∈ Fin
63 elin 3779 . . . . . . . . . . . . . . . . . . . . 21 (∅ ∈ (𝒫 𝑎 ∩ Fin) ↔ (∅ ∈ 𝒫 𝑎 ∧ ∅ ∈ Fin))
6461, 62, 63mpbir2an 954 . . . . . . . . . . . . . . . . . . . 20 ∅ ∈ (𝒫 𝑎 ∩ Fin)
65 unieq 4415 . . . . . . . . . . . . . . . . . . . . . . 23 (𝑏 = ∅ → 𝑏 = ∅)
6665eqeq2d 2631 . . . . . . . . . . . . . . . . . . . . . 22 (𝑏 = ∅ → (𝑋 = 𝑏𝑋 = ∅))
6766notbid 308 . . . . . . . . . . . . . . . . . . . . 21 (𝑏 = ∅ → (¬ 𝑋 = 𝑏 ↔ ¬ 𝑋 = ∅))
6867rspccv 3295 . . . . . . . . . . . . . . . . . . . 20 (∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏 → (∅ ∈ (𝒫 𝑎 ∩ Fin) → ¬ 𝑋 = ∅))
6964, 68mpi 20 . . . . . . . . . . . . . . . . . . 19 (∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏 → ¬ 𝑋 = ∅)
70 vex 3192 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 𝑛 ∈ V
7170elpw 4141 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (𝑛 ∈ 𝒫 𝑤𝑛𝑤)
72 elin 3779 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 (𝑛 ∈ (𝒫 𝑤 ∩ Fin) ↔ (𝑛 ∈ 𝒫 𝑤𝑛 ∈ Fin))
73 unieq 4415 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 (𝑏 = 𝑛 𝑏 = 𝑛)
7473eqeq2d 2631 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 (𝑏 = 𝑛 → (𝑋 = 𝑏𝑋 = 𝑛))
7574notbid 308 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 (𝑏 = 𝑛 → (¬ 𝑋 = 𝑏 ↔ ¬ 𝑋 = 𝑛))
7675rspccv 3295 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 (∀𝑏 ∈ (𝒫 𝑤 ∩ Fin) ¬ 𝑋 = 𝑏 → (𝑛 ∈ (𝒫 𝑤 ∩ Fin) → ¬ 𝑋 = 𝑛))
7772, 76syl5bir 233 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (∀𝑏 ∈ (𝒫 𝑤 ∩ Fin) ¬ 𝑋 = 𝑏 → ((𝑛 ∈ 𝒫 𝑤𝑛 ∈ Fin) → ¬ 𝑋 = 𝑛))
7877expd 452 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (∀𝑏 ∈ (𝒫 𝑤 ∩ Fin) ¬ 𝑋 = 𝑏 → (𝑛 ∈ 𝒫 𝑤 → (𝑛 ∈ Fin → ¬ 𝑋 = 𝑛)))
7971, 78syl5bir 233 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (∀𝑏 ∈ (𝒫 𝑤 ∩ Fin) ¬ 𝑋 = 𝑏 → (𝑛𝑤 → (𝑛 ∈ Fin → ¬ 𝑋 = 𝑛)))
8079com23 86 . . . . . . . . . . . . . . . . . . . . . . . . 25 (∀𝑏 ∈ (𝒫 𝑤 ∩ Fin) ¬ 𝑋 = 𝑏 → (𝑛 ∈ Fin → (𝑛𝑤 → ¬ 𝑋 = 𝑛)))
8180ad2antll 764 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝑤 ∈ 𝒫 (fi‘𝑥) ∧ (𝑎𝑤 ∧ ∀𝑏 ∈ (𝒫 𝑤 ∩ Fin) ¬ 𝑋 = 𝑏)) → (𝑛 ∈ Fin → (𝑛𝑤 → ¬ 𝑋 = 𝑛)))
8281a1i 11 . . . . . . . . . . . . . . . . . . . . . . 23 𝑋 = ∅ → ((𝑤 ∈ 𝒫 (fi‘𝑥) ∧ (𝑎𝑤 ∧ ∀𝑏 ∈ (𝒫 𝑤 ∩ Fin) ¬ 𝑋 = 𝑏)) → (𝑛 ∈ Fin → (𝑛𝑤 → ¬ 𝑋 = 𝑛))))
83 sseq2 3611 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (𝑤 = ∅ → (𝑛𝑤𝑛 ⊆ ∅))
84 ss0 3951 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (𝑛 ⊆ ∅ → 𝑛 = ∅)
8583, 84syl6bi 243 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑤 = ∅ → (𝑛𝑤𝑛 = ∅))
86 unieq 4415 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 (𝑛 = ∅ → 𝑛 = ∅)
8786eqeq2d 2631 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (𝑛 = ∅ → (𝑋 = 𝑛𝑋 = ∅))
8887notbid 308 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (𝑛 = ∅ → (¬ 𝑋 = 𝑛 ↔ ¬ 𝑋 = ∅))
8988biimprcd 240 . . . . . . . . . . . . . . . . . . . . . . . . . 26 𝑋 = ∅ → (𝑛 = ∅ → ¬ 𝑋 = 𝑛))
9089a1dd 50 . . . . . . . . . . . . . . . . . . . . . . . . 25 𝑋 = ∅ → (𝑛 = ∅ → (𝑛 ∈ Fin → ¬ 𝑋 = 𝑛)))
9185, 90syl9r 78 . . . . . . . . . . . . . . . . . . . . . . . 24 𝑋 = ∅ → (𝑤 = ∅ → (𝑛𝑤 → (𝑛 ∈ Fin → ¬ 𝑋 = 𝑛))))
9291com34 91 . . . . . . . . . . . . . . . . . . . . . . 23 𝑋 = ∅ → (𝑤 = ∅ → (𝑛 ∈ Fin → (𝑛𝑤 → ¬ 𝑋 = 𝑛))))
9382, 92jaod 395 . . . . . . . . . . . . . . . . . . . . . 22 𝑋 = ∅ → (((𝑤 ∈ 𝒫 (fi‘𝑥) ∧ (𝑎𝑤 ∧ ∀𝑏 ∈ (𝒫 𝑤 ∩ Fin) ¬ 𝑋 = 𝑏)) ∨ 𝑤 = ∅) → (𝑛 ∈ Fin → (𝑛𝑤 → ¬ 𝑋 = 𝑛))))
9411, 93syl5bi 232 . . . . . . . . . . . . . . . . . . . . 21 𝑋 = ∅ → (𝑤 ∈ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) → (𝑛 ∈ Fin → (𝑛𝑤 → ¬ 𝑋 = 𝑛))))
951, 94sylan9r 689 . . . . . . . . . . . . . . . . . . . 20 ((¬ 𝑋 = ∅ ∧ 𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅})) → (𝑤𝑦 → (𝑛 ∈ Fin → (𝑛𝑤 → ¬ 𝑋 = 𝑛))))
9695com23 86 . . . . . . . . . . . . . . . . . . 19 ((¬ 𝑋 = ∅ ∧ 𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅})) → (𝑛 ∈ Fin → (𝑤𝑦 → (𝑛𝑤 → ¬ 𝑋 = 𝑛))))
9769, 96sylan 488 . . . . . . . . . . . . . . . . . 18 ((∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅})) → (𝑛 ∈ Fin → (𝑤𝑦 → (𝑛𝑤 → ¬ 𝑋 = 𝑛))))
9897ad2ant2lr 783 . . . . . . . . . . . . . . . . 17 ((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) → (𝑛 ∈ Fin → (𝑤𝑦 → (𝑛𝑤 → ¬ 𝑋 = 𝑛))))
9998imp 445 . . . . . . . . . . . . . . . 16 (((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) ∧ 𝑛 ∈ Fin) → (𝑤𝑦 → (𝑛𝑤 → ¬ 𝑋 = 𝑛)))
10099adantrl 751 . . . . . . . . . . . . . . 15 (((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) ∧ (¬ 𝑦 = ∅ ∧ 𝑛 ∈ Fin)) → (𝑤𝑦 → (𝑛𝑤 → ¬ 𝑋 = 𝑛)))
101100rexlimdv 3024 . . . . . . . . . . . . . 14 (((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) ∧ (¬ 𝑦 = ∅ ∧ 𝑛 ∈ Fin)) → (∃𝑤𝑦 𝑛𝑤 → ¬ 𝑋 = 𝑛))
10260, 101syld 47 . . . . . . . . . . . . 13 (((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) ∧ (¬ 𝑦 = ∅ ∧ 𝑛 ∈ Fin)) → (𝑛 𝑦 → ¬ 𝑋 = 𝑛))
103102expr 642 . . . . . . . . . . . 12 (((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) ∧ ¬ 𝑦 = ∅) → (𝑛 ∈ Fin → (𝑛 𝑦 → ¬ 𝑋 = 𝑛)))
104103com23 86 . . . . . . . . . . 11 (((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) ∧ ¬ 𝑦 = ∅) → (𝑛 𝑦 → (𝑛 ∈ Fin → ¬ 𝑋 = 𝑛)))
105104impd 447 . . . . . . . . . 10 (((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) ∧ ¬ 𝑦 = ∅) → ((𝑛 𝑦𝑛 ∈ Fin) → ¬ 𝑋 = 𝑛))
10648, 105syl5bi 232 . . . . . . . . 9 (((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) ∧ ¬ 𝑦 = ∅) → (𝑛 ∈ (𝒫 𝑦 ∩ Fin) → ¬ 𝑋 = 𝑛))
107106ralrimiv 2960 . . . . . . . 8 (((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) ∧ ¬ 𝑦 = ∅) → ∀𝑛 ∈ (𝒫 𝑦 ∩ Fin) ¬ 𝑋 = 𝑛)
108 unieq 4415 . . . . . . . . . . 11 (𝑛 = 𝑏 𝑛 = 𝑏)
109108eqeq2d 2631 . . . . . . . . . 10 (𝑛 = 𝑏 → (𝑋 = 𝑛𝑋 = 𝑏))
110109notbid 308 . . . . . . . . 9 (𝑛 = 𝑏 → (¬ 𝑋 = 𝑛 ↔ ¬ 𝑋 = 𝑏))
111110cbvralv 3162 . . . . . . . 8 (∀𝑛 ∈ (𝒫 𝑦 ∩ Fin) ¬ 𝑋 = 𝑛 ↔ ∀𝑏 ∈ (𝒫 𝑦 ∩ Fin) ¬ 𝑋 = 𝑏)
112107, 111sylib 208 . . . . . . 7 (((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) ∧ ¬ 𝑦 = ∅) → ∀𝑏 ∈ (𝒫 𝑦 ∩ Fin) ¬ 𝑋 = 𝑏)
11327, 47, 112jca32 557 . . . . . 6 (((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) ∧ ¬ 𝑦 = ∅) → ( 𝑦 ∈ 𝒫 (fi‘𝑥) ∧ (𝑎 𝑦 ∧ ∀𝑏 ∈ (𝒫 𝑦 ∩ Fin) ¬ 𝑋 = 𝑏)))
114113ex 450 . . . . 5 ((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) → (¬ 𝑦 = ∅ → ( 𝑦 ∈ 𝒫 (fi‘𝑥) ∧ (𝑎 𝑦 ∧ ∀𝑏 ∈ (𝒫 𝑦 ∩ Fin) ¬ 𝑋 = 𝑏))))
115 orcom 402 . . . . . 6 (( 𝑦 ∈ {∅} ∨ 𝑦 ∈ {𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)}) ↔ ( 𝑦 ∈ {𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∨ 𝑦 ∈ {∅}))
11625elsn 4168 . . . . . . . 8 ( 𝑦 ∈ {∅} ↔ 𝑦 = ∅)
117 sseq2 3611 . . . . . . . . . 10 (𝑧 = 𝑦 → (𝑎𝑧𝑎 𝑦))
118 pweq 4138 . . . . . . . . . . . 12 (𝑧 = 𝑦 → 𝒫 𝑧 = 𝒫 𝑦)
119118ineq1d 3796 . . . . . . . . . . 11 (𝑧 = 𝑦 → (𝒫 𝑧 ∩ Fin) = (𝒫 𝑦 ∩ Fin))
120119raleqdv 3136 . . . . . . . . . 10 (𝑧 = 𝑦 → (∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏 ↔ ∀𝑏 ∈ (𝒫 𝑦 ∩ Fin) ¬ 𝑋 = 𝑏))
121117, 120anbi12d 746 . . . . . . . . 9 (𝑧 = 𝑦 → ((𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏) ↔ (𝑎 𝑦 ∧ ∀𝑏 ∈ (𝒫 𝑦 ∩ Fin) ¬ 𝑋 = 𝑏)))
122121elrab 3350 . . . . . . . 8 ( 𝑦 ∈ {𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ↔ ( 𝑦 ∈ 𝒫 (fi‘𝑥) ∧ (𝑎 𝑦 ∧ ∀𝑏 ∈ (𝒫 𝑦 ∩ Fin) ¬ 𝑋 = 𝑏)))
123116, 122orbi12i 543 . . . . . . 7 (( 𝑦 ∈ {∅} ∨ 𝑦 ∈ {𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)}) ↔ ( 𝑦 = ∅ ∨ ( 𝑦 ∈ 𝒫 (fi‘𝑥) ∧ (𝑎 𝑦 ∧ ∀𝑏 ∈ (𝒫 𝑦 ∩ Fin) ¬ 𝑋 = 𝑏))))
124 df-or 385 . . . . . . 7 (( 𝑦 = ∅ ∨ ( 𝑦 ∈ 𝒫 (fi‘𝑥) ∧ (𝑎 𝑦 ∧ ∀𝑏 ∈ (𝒫 𝑦 ∩ Fin) ¬ 𝑋 = 𝑏))) ↔ (¬ 𝑦 = ∅ → ( 𝑦 ∈ 𝒫 (fi‘𝑥) ∧ (𝑎 𝑦 ∧ ∀𝑏 ∈ (𝒫 𝑦 ∩ Fin) ¬ 𝑋 = 𝑏))))
125123, 124bitr2i 265 . . . . . 6 ((¬ 𝑦 = ∅ → ( 𝑦 ∈ 𝒫 (fi‘𝑥) ∧ (𝑎 𝑦 ∧ ∀𝑏 ∈ (𝒫 𝑦 ∩ Fin) ¬ 𝑋 = 𝑏))) ↔ ( 𝑦 ∈ {∅} ∨ 𝑦 ∈ {𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)}))
126 elun 3736 . . . . . 6 ( 𝑦 ∈ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ↔ ( 𝑦 ∈ {𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∨ 𝑦 ∈ {∅}))
127115, 125, 1263bitr4i 292 . . . . 5 ((¬ 𝑦 = ∅ → ( 𝑦 ∈ 𝒫 (fi‘𝑥) ∧ (𝑎 𝑦 ∧ ∀𝑏 ∈ (𝒫 𝑦 ∩ Fin) ¬ 𝑋 = 𝑏))) ↔ 𝑦 ∈ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}))
128114, 127sylib 208 . . . 4 ((((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) ∧ (𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦)) → 𝑦 ∈ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}))
129128ex 450 . . 3 (((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) → ((𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦) → 𝑦 ∈ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅})))
130129alrimiv 1852 . 2 (((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) → ∀𝑦((𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦) → 𝑦 ∈ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅})))
131 fvex 6163 . . . . . 6 (fi‘𝑥) ∈ V
132131pwex 4813 . . . . 5 𝒫 (fi‘𝑥) ∈ V
133132rabex 4778 . . . 4 {𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∈ V
134 p0ex 4818 . . . 4 {∅} ∈ V
135133, 134unex 6916 . . 3 ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∈ V
136135zorn 9281 . 2 (∀𝑦((𝑦 ⊆ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ∧ [] Or 𝑦) → 𝑦 ∈ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅})) → ∃𝑢 ∈ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅})∀𝑣 ∈ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ¬ 𝑢𝑣)
137130, 136syl 17 1 (((𝐽 = (topGen‘(fi‘𝑥)) ∧ ∀𝑐 ∈ 𝒫 𝑥(𝑋 = 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑋 = 𝑑) ∧ 𝑎 ∈ 𝒫 (fi‘𝑥)) ∧ ∀𝑏 ∈ (𝒫 𝑎 ∩ Fin) ¬ 𝑋 = 𝑏) → ∃𝑢 ∈ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅})∀𝑣 ∈ ({𝑧 ∈ 𝒫 (fi‘𝑥) ∣ (𝑎𝑧 ∧ ∀𝑏 ∈ (𝒫 𝑧 ∩ Fin) ¬ 𝑋 = 𝑏)} ∪ {∅}) ¬ 𝑢𝑣)
 Colors of variables: wff setvar class Syntax hints:  ¬ wn 3   → wi 4   ∨ wo 383   ∧ wa 384   ∧ w3a 1036  ∀wal 1478   = wceq 1480  ∃wex 1701   ∈ wcel 1987   ≠ wne 2790  ∀wral 2907  ∃wrex 2908  {crab 2911   ∪ cun 3557   ∩ cin 3558   ⊆ wss 3559   ⊊ wpss 3560  ∅c0 3896  𝒫 cpw 4135  {csn 4153  ∪ cuni 4407   Or wor 4999  ‘cfv 5852   [⊊] crpss 6896  Fincfn 7907  ficfi 8268  topGenctg 16030 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1836  ax-6 1885  ax-7 1932  ax-8 1989  ax-9 1996  ax-10 2016  ax-11 2031  ax-12 2044  ax-13 2245  ax-ext 2601  ax-rep 4736  ax-sep 4746  ax-nul 4754  ax-pow 4808  ax-pr 4872  ax-un 6909  ax-ac2 9237 This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1037  df-3an 1038  df-tru 1483  df-ex 1702  df-nf 1707  df-sb 1878  df-eu 2473  df-mo 2474  df-clab 2608  df-cleq 2614  df-clel 2617  df-nfc 2750  df-ne 2791  df-ral 2912  df-rex 2913  df-reu 2914  df-rmo 2915  df-rab 2916  df-v 3191  df-sbc 3422  df-csb 3519  df-dif 3562  df-un 3564  df-in 3566  df-ss 3573  df-pss 3575  df-nul 3897  df-if 4064  df-pw 4137  df-sn 4154  df-pr 4156  df-tp 4158  df-op 4160  df-uni 4408  df-int 4446  df-iun 4492  df-br 4619  df-opab 4679  df-mpt 4680  df-tr 4718  df-eprel 4990  df-id 4994  df-po 5000  df-so 5001  df-fr 5038  df-se 5039  df-we 5040  df-xp 5085  df-rel 5086  df-cnv 5087  df-co 5088  df-dm 5089  df-rn 5090  df-res 5091  df-ima 5092  df-pred 5644  df-ord 5690  df-on 5691  df-lim 5692  df-suc 5693  df-iota 5815  df-fun 5854  df-fn 5855  df-f 5856  df-f1 5857  df-fo 5858  df-f1o 5859  df-fv 5860  df-isom 5861  df-riota 6571  df-rpss 6897  df-om 7020  df-wrecs 7359  df-recs 7420  df-1o 7512  df-er 7694  df-en 7908  df-fin 7911  df-card 8717  df-ac 8891 This theorem is referenced by:  alexsubALTlem4  21777
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