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Theorem ppttop 20716
Description: The particular point topology. (Contributed by Mario Carneiro, 3-Sep-2015.)
Assertion
Ref Expression
ppttop ((𝐴𝑉𝑃𝐴) → {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} ∈ (TopOn‘𝐴))
Distinct variable groups:   𝑥,𝐴   𝑥,𝑃   𝑥,𝑉

Proof of Theorem ppttop
Dummy variables 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 ssrab 3664 . . . . 5 (𝑦 ⊆ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} ↔ (𝑦 ⊆ 𝒫 𝐴 ∧ ∀𝑥𝑦 (𝑃𝑥𝑥 = ∅)))
2 simprl 793 . . . . . . . . 9 (((𝐴𝑉𝑃𝐴) ∧ (𝑦 ⊆ 𝒫 𝐴 ∧ ∀𝑥𝑦 (𝑃𝑥𝑥 = ∅))) → 𝑦 ⊆ 𝒫 𝐴)
3 sspwuni 4582 . . . . . . . . 9 (𝑦 ⊆ 𝒫 𝐴 𝑦𝐴)
42, 3sylib 208 . . . . . . . 8 (((𝐴𝑉𝑃𝐴) ∧ (𝑦 ⊆ 𝒫 𝐴 ∧ ∀𝑥𝑦 (𝑃𝑥𝑥 = ∅))) → 𝑦𝐴)
5 vuniex 6908 . . . . . . . . 9 𝑦 ∈ V
65elpw 4141 . . . . . . . 8 ( 𝑦 ∈ 𝒫 𝐴 𝑦𝐴)
74, 6sylibr 224 . . . . . . 7 (((𝐴𝑉𝑃𝐴) ∧ (𝑦 ⊆ 𝒫 𝐴 ∧ ∀𝑥𝑦 (𝑃𝑥𝑥 = ∅))) → 𝑦 ∈ 𝒫 𝐴)
8 neq0 3911 . . . . . . . . . 10 𝑦 = ∅ ↔ ∃𝑧 𝑧 𝑦)
9 eluni2 4411 . . . . . . . . . . . 12 (𝑧 𝑦 ↔ ∃𝑥𝑦 𝑧𝑥)
10 r19.29 3070 . . . . . . . . . . . . . . 15 ((∀𝑥𝑦 (𝑃𝑥𝑥 = ∅) ∧ ∃𝑥𝑦 𝑧𝑥) → ∃𝑥𝑦 ((𝑃𝑥𝑥 = ∅) ∧ 𝑧𝑥))
11 n0i 3901 . . . . . . . . . . . . . . . . . . . 20 (𝑧𝑥 → ¬ 𝑥 = ∅)
1211adantl 482 . . . . . . . . . . . . . . . . . . 19 (((𝑃𝑥𝑥 = ∅) ∧ 𝑧𝑥) → ¬ 𝑥 = ∅)
13 simpl 473 . . . . . . . . . . . . . . . . . . . 20 (((𝑃𝑥𝑥 = ∅) ∧ 𝑧𝑥) → (𝑃𝑥𝑥 = ∅))
1413ord 392 . . . . . . . . . . . . . . . . . . 19 (((𝑃𝑥𝑥 = ∅) ∧ 𝑧𝑥) → (¬ 𝑃𝑥𝑥 = ∅))
1512, 14mt3d 140 . . . . . . . . . . . . . . . . . 18 (((𝑃𝑥𝑥 = ∅) ∧ 𝑧𝑥) → 𝑃𝑥)
1615adantl 482 . . . . . . . . . . . . . . . . 17 ((𝑥𝑦 ∧ ((𝑃𝑥𝑥 = ∅) ∧ 𝑧𝑥)) → 𝑃𝑥)
17 simpl 473 . . . . . . . . . . . . . . . . 17 ((𝑥𝑦 ∧ ((𝑃𝑥𝑥 = ∅) ∧ 𝑧𝑥)) → 𝑥𝑦)
18 elunii 4412 . . . . . . . . . . . . . . . . 17 ((𝑃𝑥𝑥𝑦) → 𝑃 𝑦)
1916, 17, 18syl2anc 692 . . . . . . . . . . . . . . . 16 ((𝑥𝑦 ∧ ((𝑃𝑥𝑥 = ∅) ∧ 𝑧𝑥)) → 𝑃 𝑦)
2019rexlimiva 3026 . . . . . . . . . . . . . . 15 (∃𝑥𝑦 ((𝑃𝑥𝑥 = ∅) ∧ 𝑧𝑥) → 𝑃 𝑦)
2110, 20syl 17 . . . . . . . . . . . . . 14 ((∀𝑥𝑦 (𝑃𝑥𝑥 = ∅) ∧ ∃𝑥𝑦 𝑧𝑥) → 𝑃 𝑦)
2221ex 450 . . . . . . . . . . . . 13 (∀𝑥𝑦 (𝑃𝑥𝑥 = ∅) → (∃𝑥𝑦 𝑧𝑥𝑃 𝑦))
2322ad2antll 764 . . . . . . . . . . . 12 (((𝐴𝑉𝑃𝐴) ∧ (𝑦 ⊆ 𝒫 𝐴 ∧ ∀𝑥𝑦 (𝑃𝑥𝑥 = ∅))) → (∃𝑥𝑦 𝑧𝑥𝑃 𝑦))
249, 23syl5bi 232 . . . . . . . . . . 11 (((𝐴𝑉𝑃𝐴) ∧ (𝑦 ⊆ 𝒫 𝐴 ∧ ∀𝑥𝑦 (𝑃𝑥𝑥 = ∅))) → (𝑧 𝑦𝑃 𝑦))
2524exlimdv 1863 . . . . . . . . . 10 (((𝐴𝑉𝑃𝐴) ∧ (𝑦 ⊆ 𝒫 𝐴 ∧ ∀𝑥𝑦 (𝑃𝑥𝑥 = ∅))) → (∃𝑧 𝑧 𝑦𝑃 𝑦))
268, 25syl5bi 232 . . . . . . . . 9 (((𝐴𝑉𝑃𝐴) ∧ (𝑦 ⊆ 𝒫 𝐴 ∧ ∀𝑥𝑦 (𝑃𝑥𝑥 = ∅))) → (¬ 𝑦 = ∅ → 𝑃 𝑦))
2726con1d 139 . . . . . . . 8 (((𝐴𝑉𝑃𝐴) ∧ (𝑦 ⊆ 𝒫 𝐴 ∧ ∀𝑥𝑦 (𝑃𝑥𝑥 = ∅))) → (¬ 𝑃 𝑦 𝑦 = ∅))
2827orrd 393 . . . . . . 7 (((𝐴𝑉𝑃𝐴) ∧ (𝑦 ⊆ 𝒫 𝐴 ∧ ∀𝑥𝑦 (𝑃𝑥𝑥 = ∅))) → (𝑃 𝑦 𝑦 = ∅))
29 eleq2 2693 . . . . . . . . 9 (𝑥 = 𝑦 → (𝑃𝑥𝑃 𝑦))
30 eqeq1 2630 . . . . . . . . 9 (𝑥 = 𝑦 → (𝑥 = ∅ ↔ 𝑦 = ∅))
3129, 30orbi12d 745 . . . . . . . 8 (𝑥 = 𝑦 → ((𝑃𝑥𝑥 = ∅) ↔ (𝑃 𝑦 𝑦 = ∅)))
3231elrab 3351 . . . . . . 7 ( 𝑦 ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} ↔ ( 𝑦 ∈ 𝒫 𝐴 ∧ (𝑃 𝑦 𝑦 = ∅)))
337, 28, 32sylanbrc 697 . . . . . 6 (((𝐴𝑉𝑃𝐴) ∧ (𝑦 ⊆ 𝒫 𝐴 ∧ ∀𝑥𝑦 (𝑃𝑥𝑥 = ∅))) → 𝑦 ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)})
3433ex 450 . . . . 5 ((𝐴𝑉𝑃𝐴) → ((𝑦 ⊆ 𝒫 𝐴 ∧ ∀𝑥𝑦 (𝑃𝑥𝑥 = ∅)) → 𝑦 ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)}))
351, 34syl5bi 232 . . . 4 ((𝐴𝑉𝑃𝐴) → (𝑦 ⊆ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} → 𝑦 ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)}))
3635alrimiv 1857 . . 3 ((𝐴𝑉𝑃𝐴) → ∀𝑦(𝑦 ⊆ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} → 𝑦 ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)}))
37 eleq2 2693 . . . . . . . 8 (𝑥 = 𝑦 → (𝑃𝑥𝑃𝑦))
38 eqeq1 2630 . . . . . . . 8 (𝑥 = 𝑦 → (𝑥 = ∅ ↔ 𝑦 = ∅))
3937, 38orbi12d 745 . . . . . . 7 (𝑥 = 𝑦 → ((𝑃𝑥𝑥 = ∅) ↔ (𝑃𝑦𝑦 = ∅)))
4039elrab 3351 . . . . . 6 (𝑦 ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} ↔ (𝑦 ∈ 𝒫 𝐴 ∧ (𝑃𝑦𝑦 = ∅)))
41 eleq2 2693 . . . . . . . 8 (𝑥 = 𝑧 → (𝑃𝑥𝑃𝑧))
42 eqeq1 2630 . . . . . . . 8 (𝑥 = 𝑧 → (𝑥 = ∅ ↔ 𝑧 = ∅))
4341, 42orbi12d 745 . . . . . . 7 (𝑥 = 𝑧 → ((𝑃𝑥𝑥 = ∅) ↔ (𝑃𝑧𝑧 = ∅)))
4443elrab 3351 . . . . . 6 (𝑧 ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} ↔ (𝑧 ∈ 𝒫 𝐴 ∧ (𝑃𝑧𝑧 = ∅)))
4540, 44anbi12i 732 . . . . 5 ((𝑦 ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} ∧ 𝑧 ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)}) ↔ ((𝑦 ∈ 𝒫 𝐴 ∧ (𝑃𝑦𝑦 = ∅)) ∧ (𝑧 ∈ 𝒫 𝐴 ∧ (𝑃𝑧𝑧 = ∅))))
46 inss1 3816 . . . . . . . . 9 (𝑦𝑧) ⊆ 𝑦
47 simprll 801 . . . . . . . . . 10 (((𝐴𝑉𝑃𝐴) ∧ ((𝑦 ∈ 𝒫 𝐴 ∧ (𝑃𝑦𝑦 = ∅)) ∧ (𝑧 ∈ 𝒫 𝐴 ∧ (𝑃𝑧𝑧 = ∅)))) → 𝑦 ∈ 𝒫 𝐴)
4847elpwid 4146 . . . . . . . . 9 (((𝐴𝑉𝑃𝐴) ∧ ((𝑦 ∈ 𝒫 𝐴 ∧ (𝑃𝑦𝑦 = ∅)) ∧ (𝑧 ∈ 𝒫 𝐴 ∧ (𝑃𝑧𝑧 = ∅)))) → 𝑦𝐴)
4946, 48syl5ss 3599 . . . . . . . 8 (((𝐴𝑉𝑃𝐴) ∧ ((𝑦 ∈ 𝒫 𝐴 ∧ (𝑃𝑦𝑦 = ∅)) ∧ (𝑧 ∈ 𝒫 𝐴 ∧ (𝑃𝑧𝑧 = ∅)))) → (𝑦𝑧) ⊆ 𝐴)
50 vex 3194 . . . . . . . . . 10 𝑦 ∈ V
5150inex1 4764 . . . . . . . . 9 (𝑦𝑧) ∈ V
5251elpw 4141 . . . . . . . 8 ((𝑦𝑧) ∈ 𝒫 𝐴 ↔ (𝑦𝑧) ⊆ 𝐴)
5349, 52sylibr 224 . . . . . . 7 (((𝐴𝑉𝑃𝐴) ∧ ((𝑦 ∈ 𝒫 𝐴 ∧ (𝑃𝑦𝑦 = ∅)) ∧ (𝑧 ∈ 𝒫 𝐴 ∧ (𝑃𝑧𝑧 = ∅)))) → (𝑦𝑧) ∈ 𝒫 𝐴)
54 ianor 509 . . . . . . . . . . 11 (¬ (𝑃𝑦𝑃𝑧) ↔ (¬ 𝑃𝑦 ∨ ¬ 𝑃𝑧))
55 elin 3779 . . . . . . . . . . 11 (𝑃 ∈ (𝑦𝑧) ↔ (𝑃𝑦𝑃𝑧))
5654, 55xchnxbir 323 . . . . . . . . . 10 𝑃 ∈ (𝑦𝑧) ↔ (¬ 𝑃𝑦 ∨ ¬ 𝑃𝑧))
57 simprlr 802 . . . . . . . . . . . 12 (((𝐴𝑉𝑃𝐴) ∧ ((𝑦 ∈ 𝒫 𝐴 ∧ (𝑃𝑦𝑦 = ∅)) ∧ (𝑧 ∈ 𝒫 𝐴 ∧ (𝑃𝑧𝑧 = ∅)))) → (𝑃𝑦𝑦 = ∅))
5857ord 392 . . . . . . . . . . 11 (((𝐴𝑉𝑃𝐴) ∧ ((𝑦 ∈ 𝒫 𝐴 ∧ (𝑃𝑦𝑦 = ∅)) ∧ (𝑧 ∈ 𝒫 𝐴 ∧ (𝑃𝑧𝑧 = ∅)))) → (¬ 𝑃𝑦𝑦 = ∅))
59 simprrr 804 . . . . . . . . . . . 12 (((𝐴𝑉𝑃𝐴) ∧ ((𝑦 ∈ 𝒫 𝐴 ∧ (𝑃𝑦𝑦 = ∅)) ∧ (𝑧 ∈ 𝒫 𝐴 ∧ (𝑃𝑧𝑧 = ∅)))) → (𝑃𝑧𝑧 = ∅))
6059ord 392 . . . . . . . . . . 11 (((𝐴𝑉𝑃𝐴) ∧ ((𝑦 ∈ 𝒫 𝐴 ∧ (𝑃𝑦𝑦 = ∅)) ∧ (𝑧 ∈ 𝒫 𝐴 ∧ (𝑃𝑧𝑧 = ∅)))) → (¬ 𝑃𝑧𝑧 = ∅))
6158, 60orim12d 882 . . . . . . . . . 10 (((𝐴𝑉𝑃𝐴) ∧ ((𝑦 ∈ 𝒫 𝐴 ∧ (𝑃𝑦𝑦 = ∅)) ∧ (𝑧 ∈ 𝒫 𝐴 ∧ (𝑃𝑧𝑧 = ∅)))) → ((¬ 𝑃𝑦 ∨ ¬ 𝑃𝑧) → (𝑦 = ∅ ∨ 𝑧 = ∅)))
6256, 61syl5bi 232 . . . . . . . . 9 (((𝐴𝑉𝑃𝐴) ∧ ((𝑦 ∈ 𝒫 𝐴 ∧ (𝑃𝑦𝑦 = ∅)) ∧ (𝑧 ∈ 𝒫 𝐴 ∧ (𝑃𝑧𝑧 = ∅)))) → (¬ 𝑃 ∈ (𝑦𝑧) → (𝑦 = ∅ ∨ 𝑧 = ∅)))
63 inss 3825 . . . . . . . . . 10 ((𝑦 ⊆ ∅ ∨ 𝑧 ⊆ ∅) → (𝑦𝑧) ⊆ ∅)
64 ss0b 3950 . . . . . . . . . . 11 (𝑦 ⊆ ∅ ↔ 𝑦 = ∅)
65 ss0b 3950 . . . . . . . . . . 11 (𝑧 ⊆ ∅ ↔ 𝑧 = ∅)
6664, 65orbi12i 543 . . . . . . . . . 10 ((𝑦 ⊆ ∅ ∨ 𝑧 ⊆ ∅) ↔ (𝑦 = ∅ ∨ 𝑧 = ∅))
67 ss0b 3950 . . . . . . . . . 10 ((𝑦𝑧) ⊆ ∅ ↔ (𝑦𝑧) = ∅)
6863, 66, 673imtr3i 280 . . . . . . . . 9 ((𝑦 = ∅ ∨ 𝑧 = ∅) → (𝑦𝑧) = ∅)
6962, 68syl6 35 . . . . . . . 8 (((𝐴𝑉𝑃𝐴) ∧ ((𝑦 ∈ 𝒫 𝐴 ∧ (𝑃𝑦𝑦 = ∅)) ∧ (𝑧 ∈ 𝒫 𝐴 ∧ (𝑃𝑧𝑧 = ∅)))) → (¬ 𝑃 ∈ (𝑦𝑧) → (𝑦𝑧) = ∅))
7069orrd 393 . . . . . . 7 (((𝐴𝑉𝑃𝐴) ∧ ((𝑦 ∈ 𝒫 𝐴 ∧ (𝑃𝑦𝑦 = ∅)) ∧ (𝑧 ∈ 𝒫 𝐴 ∧ (𝑃𝑧𝑧 = ∅)))) → (𝑃 ∈ (𝑦𝑧) ∨ (𝑦𝑧) = ∅))
71 eleq2 2693 . . . . . . . . 9 (𝑥 = (𝑦𝑧) → (𝑃𝑥𝑃 ∈ (𝑦𝑧)))
72 eqeq1 2630 . . . . . . . . 9 (𝑥 = (𝑦𝑧) → (𝑥 = ∅ ↔ (𝑦𝑧) = ∅))
7371, 72orbi12d 745 . . . . . . . 8 (𝑥 = (𝑦𝑧) → ((𝑃𝑥𝑥 = ∅) ↔ (𝑃 ∈ (𝑦𝑧) ∨ (𝑦𝑧) = ∅)))
7473elrab 3351 . . . . . . 7 ((𝑦𝑧) ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} ↔ ((𝑦𝑧) ∈ 𝒫 𝐴 ∧ (𝑃 ∈ (𝑦𝑧) ∨ (𝑦𝑧) = ∅)))
7553, 70, 74sylanbrc 697 . . . . . 6 (((𝐴𝑉𝑃𝐴) ∧ ((𝑦 ∈ 𝒫 𝐴 ∧ (𝑃𝑦𝑦 = ∅)) ∧ (𝑧 ∈ 𝒫 𝐴 ∧ (𝑃𝑧𝑧 = ∅)))) → (𝑦𝑧) ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)})
7675ex 450 . . . . 5 ((𝐴𝑉𝑃𝐴) → (((𝑦 ∈ 𝒫 𝐴 ∧ (𝑃𝑦𝑦 = ∅)) ∧ (𝑧 ∈ 𝒫 𝐴 ∧ (𝑃𝑧𝑧 = ∅))) → (𝑦𝑧) ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)}))
7745, 76syl5bi 232 . . . 4 ((𝐴𝑉𝑃𝐴) → ((𝑦 ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} ∧ 𝑧 ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)}) → (𝑦𝑧) ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)}))
7877ralrimivv 2969 . . 3 ((𝐴𝑉𝑃𝐴) → ∀𝑦 ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)}∀𝑧 ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} (𝑦𝑧) ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)})
79 pwexg 4815 . . . . . 6 (𝐴𝑉 → 𝒫 𝐴 ∈ V)
8079adantr 481 . . . . 5 ((𝐴𝑉𝑃𝐴) → 𝒫 𝐴 ∈ V)
81 rabexg 4777 . . . . 5 (𝒫 𝐴 ∈ V → {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} ∈ V)
8280, 81syl 17 . . . 4 ((𝐴𝑉𝑃𝐴) → {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} ∈ V)
83 istopg 20620 . . . 4 ({𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} ∈ V → ({𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} ∈ Top ↔ (∀𝑦(𝑦 ⊆ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} → 𝑦 ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)}) ∧ ∀𝑦 ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)}∀𝑧 ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} (𝑦𝑧) ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)})))
8482, 83syl 17 . . 3 ((𝐴𝑉𝑃𝐴) → ({𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} ∈ Top ↔ (∀𝑦(𝑦 ⊆ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} → 𝑦 ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)}) ∧ ∀𝑦 ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)}∀𝑧 ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} (𝑦𝑧) ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)})))
8536, 78, 84mpbir2and 956 . 2 ((𝐴𝑉𝑃𝐴) → {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} ∈ Top)
86 pwidg 4149 . . . . . 6 (𝐴𝑉𝐴 ∈ 𝒫 𝐴)
8786adantr 481 . . . . 5 ((𝐴𝑉𝑃𝐴) → 𝐴 ∈ 𝒫 𝐴)
88 simpr 477 . . . . . 6 ((𝐴𝑉𝑃𝐴) → 𝑃𝐴)
8988orcd 407 . . . . 5 ((𝐴𝑉𝑃𝐴) → (𝑃𝐴𝐴 = ∅))
90 eleq2 2693 . . . . . . 7 (𝑥 = 𝐴 → (𝑃𝑥𝑃𝐴))
91 eqeq1 2630 . . . . . . 7 (𝑥 = 𝐴 → (𝑥 = ∅ ↔ 𝐴 = ∅))
9290, 91orbi12d 745 . . . . . 6 (𝑥 = 𝐴 → ((𝑃𝑥𝑥 = ∅) ↔ (𝑃𝐴𝐴 = ∅)))
9392elrab 3351 . . . . 5 (𝐴 ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} ↔ (𝐴 ∈ 𝒫 𝐴 ∧ (𝑃𝐴𝐴 = ∅)))
9487, 89, 93sylanbrc 697 . . . 4 ((𝐴𝑉𝑃𝐴) → 𝐴 ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)})
95 elssuni 4438 . . . 4 (𝐴 ∈ {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} → 𝐴 {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)})
9694, 95syl 17 . . 3 ((𝐴𝑉𝑃𝐴) → 𝐴 {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)})
97 ssrab2 3671 . . . . 5 {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} ⊆ 𝒫 𝐴
98 sspwuni 4582 . . . . 5 ({𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} ⊆ 𝒫 𝐴 {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} ⊆ 𝐴)
9997, 98mpbi 220 . . . 4 {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} ⊆ 𝐴
10099a1i 11 . . 3 ((𝐴𝑉𝑃𝐴) → {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} ⊆ 𝐴)
10196, 100eqssd 3605 . 2 ((𝐴𝑉𝑃𝐴) → 𝐴 = {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)})
102 istopon 20635 . 2 ({𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} ∈ (TopOn‘𝐴) ↔ ({𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} ∈ Top ∧ 𝐴 = {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)}))
10385, 101, 102sylanbrc 697 1 ((𝐴𝑉𝑃𝐴) → {𝑥 ∈ 𝒫 𝐴 ∣ (𝑃𝑥𝑥 = ∅)} ∈ (TopOn‘𝐴))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 196  wo 383  wa 384  wal 1478   = wceq 1480  wex 1701  wcel 1992  wral 2912  wrex 2913  {crab 2916  Vcvv 3191  cin 3559  wss 3560  c0 3896  𝒫 cpw 4135   cuni 4407  cfv 5850  Topctop 20612  TopOnctopon 20613
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 1841  ax-6 1890  ax-7 1937  ax-8 1994  ax-9 2001  ax-10 2021  ax-11 2036  ax-12 2049  ax-13 2250  ax-ext 2606  ax-sep 4746  ax-nul 4754  ax-pow 4808  ax-pr 4872  ax-un 6903
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1038  df-tru 1483  df-ex 1702  df-nf 1707  df-sb 1883  df-eu 2478  df-mo 2479  df-clab 2613  df-cleq 2619  df-clel 2622  df-nfc 2756  df-ne 2797  df-ral 2917  df-rex 2918  df-rab 2921  df-v 3193  df-sbc 3423  df-dif 3563  df-un 3565  df-in 3567  df-ss 3574  df-nul 3897  df-if 4064  df-pw 4137  df-sn 4154  df-pr 4156  df-op 4160  df-uni 4408  df-br 4619  df-opab 4679  df-mpt 4680  df-id 4994  df-xp 5085  df-rel 5086  df-cnv 5087  df-co 5088  df-dm 5089  df-iota 5813  df-fun 5852  df-fv 5858  df-top 20616  df-topon 20618
This theorem is referenced by:  pptbas  20717
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