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Theorem txkgen 22260
 Description: The topological product of a locally compact space and a compactly generated Hausdorff space is compactly generated. (The condition on 𝑆 can also be replaced with either "compactly generated weak Hausdorff (CGWH)" or "compact Hausdorff-ly generated (CHG)", where WH means that all images of compact Hausdorff spaces are closed and CHG means that a set is open iff it is open in all compact Hausdorff spaces.) (Contributed by Mario Carneiro, 23-Mar-2015.)
Assertion
Ref Expression
txkgen ((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) → (𝑅 ×t 𝑆) ∈ ran 𝑘Gen)

Proof of Theorem txkgen
Dummy variables 𝑎 𝑏 𝑘 𝑠 𝑡 𝑢 𝑥 𝑦 𝑣 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 nllytop 22081 . . 3 (𝑅 ∈ 𝑛-Locally Comp → 𝑅 ∈ Top)
2 elinel1 4125 . . . 4 (𝑆 ∈ (ran 𝑘Gen ∩ Haus) → 𝑆 ∈ ran 𝑘Gen)
3 kgentop 22150 . . . 4 (𝑆 ∈ ran 𝑘Gen → 𝑆 ∈ Top)
42, 3syl 17 . . 3 (𝑆 ∈ (ran 𝑘Gen ∩ Haus) → 𝑆 ∈ Top)
5 txtop 22177 . . 3 ((𝑅 ∈ Top ∧ 𝑆 ∈ Top) → (𝑅 ×t 𝑆) ∈ Top)
61, 4, 5syl2an 598 . 2 ((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) → (𝑅 ×t 𝑆) ∈ Top)
7 simplll 774 . . . . . . . 8 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → 𝑅 ∈ 𝑛-Locally Comp)
8 eqid 2801 . . . . . . . . . 10 (𝑡 𝑅 ↦ ⟨𝑡, (2nd𝑦)⟩) = (𝑡 𝑅 ↦ ⟨𝑡, (2nd𝑦)⟩)
98mptpreima 6063 . . . . . . . . 9 ((𝑡 𝑅 ↦ ⟨𝑡, (2nd𝑦)⟩) “ 𝑥) = {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥}
101ad3antrrr 729 . . . . . . . . . . . . . 14 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → 𝑅 ∈ Top)
11 toptopon2 21526 . . . . . . . . . . . . . 14 (𝑅 ∈ Top ↔ 𝑅 ∈ (TopOn‘ 𝑅))
1210, 11sylib 221 . . . . . . . . . . . . 13 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → 𝑅 ∈ (TopOn‘ 𝑅))
13 idcn 21865 . . . . . . . . . . . . 13 (𝑅 ∈ (TopOn‘ 𝑅) → ( I ↾ 𝑅) ∈ (𝑅 Cn 𝑅))
1412, 13syl 17 . . . . . . . . . . . 12 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → ( I ↾ 𝑅) ∈ (𝑅 Cn 𝑅))
15 simpllr 775 . . . . . . . . . . . . . . 15 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → 𝑆 ∈ (ran 𝑘Gen ∩ Haus))
1615, 4syl 17 . . . . . . . . . . . . . 14 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → 𝑆 ∈ Top)
17 toptopon2 21526 . . . . . . . . . . . . . 14 (𝑆 ∈ Top ↔ 𝑆 ∈ (TopOn‘ 𝑆))
1816, 17sylib 221 . . . . . . . . . . . . 13 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → 𝑆 ∈ (TopOn‘ 𝑆))
19 simpr 488 . . . . . . . . . . . . . . . 16 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → 𝑦𝑥)
20 simplr 768 . . . . . . . . . . . . . . . 16 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆)))
21 elunii 4808 . . . . . . . . . . . . . . . 16 ((𝑦𝑥𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) → 𝑦 (𝑘Gen‘(𝑅 ×t 𝑆)))
2219, 20, 21syl2anc 587 . . . . . . . . . . . . . . 15 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → 𝑦 (𝑘Gen‘(𝑅 ×t 𝑆)))
23 eqid 2801 . . . . . . . . . . . . . . . . . 18 𝑅 = 𝑅
24 eqid 2801 . . . . . . . . . . . . . . . . . 18 𝑆 = 𝑆
2523, 24txuni 22200 . . . . . . . . . . . . . . . . 17 ((𝑅 ∈ Top ∧ 𝑆 ∈ Top) → ( 𝑅 × 𝑆) = (𝑅 ×t 𝑆))
2610, 16, 25syl2anc 587 . . . . . . . . . . . . . . . 16 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → ( 𝑅 × 𝑆) = (𝑅 ×t 𝑆))
2710, 16, 5syl2anc 587 . . . . . . . . . . . . . . . . 17 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → (𝑅 ×t 𝑆) ∈ Top)
28 eqid 2801 . . . . . . . . . . . . . . . . . 18 (𝑅 ×t 𝑆) = (𝑅 ×t 𝑆)
2928kgenuni 22147 . . . . . . . . . . . . . . . . 17 ((𝑅 ×t 𝑆) ∈ Top → (𝑅 ×t 𝑆) = (𝑘Gen‘(𝑅 ×t 𝑆)))
3027, 29syl 17 . . . . . . . . . . . . . . . 16 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → (𝑅 ×t 𝑆) = (𝑘Gen‘(𝑅 ×t 𝑆)))
3126, 30eqtrd 2836 . . . . . . . . . . . . . . 15 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → ( 𝑅 × 𝑆) = (𝑘Gen‘(𝑅 ×t 𝑆)))
3222, 31eleqtrrd 2896 . . . . . . . . . . . . . 14 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → 𝑦 ∈ ( 𝑅 × 𝑆))
33 xp2nd 7708 . . . . . . . . . . . . . 14 (𝑦 ∈ ( 𝑅 × 𝑆) → (2nd𝑦) ∈ 𝑆)
3432, 33syl 17 . . . . . . . . . . . . 13 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → (2nd𝑦) ∈ 𝑆)
35 cnconst2 21891 . . . . . . . . . . . . 13 ((𝑅 ∈ (TopOn‘ 𝑅) ∧ 𝑆 ∈ (TopOn‘ 𝑆) ∧ (2nd𝑦) ∈ 𝑆) → ( 𝑅 × {(2nd𝑦)}) ∈ (𝑅 Cn 𝑆))
3612, 18, 34, 35syl3anc 1368 . . . . . . . . . . . 12 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → ( 𝑅 × {(2nd𝑦)}) ∈ (𝑅 Cn 𝑆))
37 fvresi 6916 . . . . . . . . . . . . . . . 16 (𝑡 𝑅 → (( I ↾ 𝑅)‘𝑡) = 𝑡)
38 fvex 6662 . . . . . . . . . . . . . . . . 17 (2nd𝑦) ∈ V
3938fvconst2 6947 . . . . . . . . . . . . . . . 16 (𝑡 𝑅 → (( 𝑅 × {(2nd𝑦)})‘𝑡) = (2nd𝑦))
4037, 39opeq12d 4776 . . . . . . . . . . . . . . 15 (𝑡 𝑅 → ⟨(( I ↾ 𝑅)‘𝑡), (( 𝑅 × {(2nd𝑦)})‘𝑡)⟩ = ⟨𝑡, (2nd𝑦)⟩)
4140mpteq2ia 5124 . . . . . . . . . . . . . 14 (𝑡 𝑅 ↦ ⟨(( I ↾ 𝑅)‘𝑡), (( 𝑅 × {(2nd𝑦)})‘𝑡)⟩) = (𝑡 𝑅 ↦ ⟨𝑡, (2nd𝑦)⟩)
4241eqcomi 2810 . . . . . . . . . . . . 13 (𝑡 𝑅 ↦ ⟨𝑡, (2nd𝑦)⟩) = (𝑡 𝑅 ↦ ⟨(( I ↾ 𝑅)‘𝑡), (( 𝑅 × {(2nd𝑦)})‘𝑡)⟩)
4323, 42txcnmpt 22232 . . . . . . . . . . . 12 ((( I ↾ 𝑅) ∈ (𝑅 Cn 𝑅) ∧ ( 𝑅 × {(2nd𝑦)}) ∈ (𝑅 Cn 𝑆)) → (𝑡 𝑅 ↦ ⟨𝑡, (2nd𝑦)⟩) ∈ (𝑅 Cn (𝑅 ×t 𝑆)))
4414, 36, 43syl2anc 587 . . . . . . . . . . 11 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → (𝑡 𝑅 ↦ ⟨𝑡, (2nd𝑦)⟩) ∈ (𝑅 Cn (𝑅 ×t 𝑆)))
45 llycmpkgen 22160 . . . . . . . . . . . . 13 (𝑅 ∈ 𝑛-Locally Comp → 𝑅 ∈ ran 𝑘Gen)
4645ad3antrrr 729 . . . . . . . . . . . 12 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → 𝑅 ∈ ran 𝑘Gen)
476ad2antrr 725 . . . . . . . . . . . 12 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → (𝑅 ×t 𝑆) ∈ Top)
48 kgencn3 22166 . . . . . . . . . . . 12 ((𝑅 ∈ ran 𝑘Gen ∧ (𝑅 ×t 𝑆) ∈ Top) → (𝑅 Cn (𝑅 ×t 𝑆)) = (𝑅 Cn (𝑘Gen‘(𝑅 ×t 𝑆))))
4946, 47, 48syl2anc 587 . . . . . . . . . . 11 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → (𝑅 Cn (𝑅 ×t 𝑆)) = (𝑅 Cn (𝑘Gen‘(𝑅 ×t 𝑆))))
5044, 49eleqtrd 2895 . . . . . . . . . 10 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → (𝑡 𝑅 ↦ ⟨𝑡, (2nd𝑦)⟩) ∈ (𝑅 Cn (𝑘Gen‘(𝑅 ×t 𝑆))))
51 cnima 21873 . . . . . . . . . 10 (((𝑡 𝑅 ↦ ⟨𝑡, (2nd𝑦)⟩) ∈ (𝑅 Cn (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) → ((𝑡 𝑅 ↦ ⟨𝑡, (2nd𝑦)⟩) “ 𝑥) ∈ 𝑅)
5250, 20, 51syl2anc 587 . . . . . . . . 9 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → ((𝑡 𝑅 ↦ ⟨𝑡, (2nd𝑦)⟩) “ 𝑥) ∈ 𝑅)
539, 52eqeltrrid 2898 . . . . . . . 8 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∈ 𝑅)
54 opeq1 4766 . . . . . . . . . 10 (𝑡 = (1st𝑦) → ⟨𝑡, (2nd𝑦)⟩ = ⟨(1st𝑦), (2nd𝑦)⟩)
5554eleq1d 2877 . . . . . . . . 9 (𝑡 = (1st𝑦) → (⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥 ↔ ⟨(1st𝑦), (2nd𝑦)⟩ ∈ 𝑥))
56 xp1st 7707 . . . . . . . . . 10 (𝑦 ∈ ( 𝑅 × 𝑆) → (1st𝑦) ∈ 𝑅)
5732, 56syl 17 . . . . . . . . 9 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → (1st𝑦) ∈ 𝑅)
58 1st2nd2 7714 . . . . . . . . . . 11 (𝑦 ∈ ( 𝑅 × 𝑆) → 𝑦 = ⟨(1st𝑦), (2nd𝑦)⟩)
5932, 58syl 17 . . . . . . . . . 10 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → 𝑦 = ⟨(1st𝑦), (2nd𝑦)⟩)
6059, 19eqeltrrd 2894 . . . . . . . . 9 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → ⟨(1st𝑦), (2nd𝑦)⟩ ∈ 𝑥)
6155, 57, 60elrabd 3633 . . . . . . . 8 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → (1st𝑦) ∈ {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥})
62 nlly2i 22084 . . . . . . . 8 ((𝑅 ∈ 𝑛-Locally Comp ∧ {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∈ 𝑅 ∧ (1st𝑦) ∈ {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥}) → ∃𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥}∃𝑢𝑅 ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))
637, 53, 61, 62syl3anc 1368 . . . . . . 7 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → ∃𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥}∃𝑢𝑅 ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))
6410adantr 484 . . . . . . . . . . 11 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → 𝑅 ∈ Top)
6516adantr 484 . . . . . . . . . . 11 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → 𝑆 ∈ Top)
66 simprlr 779 . . . . . . . . . . 11 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → 𝑢𝑅)
67 ssrab2 4010 . . . . . . . . . . . . . 14 {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥} ⊆ 𝑆
6867a1i 11 . . . . . . . . . . . . 13 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥} ⊆ 𝑆)
69 incom 4131 . . . . . . . . . . . . . . . 16 ({𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥} ∩ 𝑘) = (𝑘 ∩ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥})
70 simprll 778 . . . . . . . . . . . . . . . . . . . . . . 23 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → 𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥})
7170elpwid 4511 . . . . . . . . . . . . . . . . . . . . . 22 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → 𝑠 ⊆ {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥})
72 ssrab2 4010 . . . . . . . . . . . . . . . . . . . . . 22 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ⊆ 𝑅
7371, 72sstrdi 3930 . . . . . . . . . . . . . . . . . . . . 21 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → 𝑠 𝑅)
7473adantr 484 . . . . . . . . . . . . . . . . . . . 20 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → 𝑠 𝑅)
75 elpwi 4509 . . . . . . . . . . . . . . . . . . . . 21 (𝑘 ∈ 𝒫 𝑆𝑘 𝑆)
7675ad2antrl 727 . . . . . . . . . . . . . . . . . . . 20 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → 𝑘 𝑆)
77 eldif 3894 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (𝑡 ∈ ((𝑠 × 𝑘) ∖ 𝑥) ↔ (𝑡 ∈ (𝑠 × 𝑘) ∧ ¬ 𝑡𝑥))
7877anbi1i 626 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((𝑡 ∈ ((𝑠 × 𝑘) ∖ 𝑥) ∧ ((2nd ↾ ( 𝑅 × 𝑆))‘𝑡) = 𝑏) ↔ ((𝑡 ∈ (𝑠 × 𝑘) ∧ ¬ 𝑡𝑥) ∧ ((2nd ↾ ( 𝑅 × 𝑆))‘𝑡) = 𝑏))
79 anass 472 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (((𝑡 ∈ (𝑠 × 𝑘) ∧ ¬ 𝑡𝑥) ∧ ((2nd ↾ ( 𝑅 × 𝑆))‘𝑡) = 𝑏) ↔ (𝑡 ∈ (𝑠 × 𝑘) ∧ (¬ 𝑡𝑥 ∧ ((2nd ↾ ( 𝑅 × 𝑆))‘𝑡) = 𝑏)))
8078, 79bitri 278 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((𝑡 ∈ ((𝑠 × 𝑘) ∖ 𝑥) ∧ ((2nd ↾ ( 𝑅 × 𝑆))‘𝑡) = 𝑏) ↔ (𝑡 ∈ (𝑠 × 𝑘) ∧ (¬ 𝑡𝑥 ∧ ((2nd ↾ ( 𝑅 × 𝑆))‘𝑡) = 𝑏)))
8180rexbii2 3211 . . . . . . . . . . . . . . . . . . . . . . . 24 (∃𝑡 ∈ ((𝑠 × 𝑘) ∖ 𝑥)((2nd ↾ ( 𝑅 × 𝑆))‘𝑡) = 𝑏 ↔ ∃𝑡 ∈ (𝑠 × 𝑘)(¬ 𝑡𝑥 ∧ ((2nd ↾ ( 𝑅 × 𝑆))‘𝑡) = 𝑏))
82 ancom 464 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((¬ 𝑡𝑥 ∧ ((2nd ↾ ( 𝑅 × 𝑆))‘𝑡) = 𝑏) ↔ (((2nd ↾ ( 𝑅 × 𝑆))‘𝑡) = 𝑏 ∧ ¬ 𝑡𝑥))
83 fveqeq2 6658 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (𝑡 = ⟨𝑎, 𝑢⟩ → (((2nd ↾ ( 𝑅 × 𝑆))‘𝑡) = 𝑏 ↔ ((2nd ↾ ( 𝑅 × 𝑆))‘⟨𝑎, 𝑢⟩) = 𝑏))
84 eleq1 2880 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (𝑡 = ⟨𝑎, 𝑢⟩ → (𝑡𝑥 ↔ ⟨𝑎, 𝑢⟩ ∈ 𝑥))
8584notbid 321 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (𝑡 = ⟨𝑎, 𝑢⟩ → (¬ 𝑡𝑥 ↔ ¬ ⟨𝑎, 𝑢⟩ ∈ 𝑥))
8683, 85anbi12d 633 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (𝑡 = ⟨𝑎, 𝑢⟩ → ((((2nd ↾ ( 𝑅 × 𝑆))‘𝑡) = 𝑏 ∧ ¬ 𝑡𝑥) ↔ (((2nd ↾ ( 𝑅 × 𝑆))‘⟨𝑎, 𝑢⟩) = 𝑏 ∧ ¬ ⟨𝑎, 𝑢⟩ ∈ 𝑥)))
8782, 86syl5bb 286 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑡 = ⟨𝑎, 𝑢⟩ → ((¬ 𝑡𝑥 ∧ ((2nd ↾ ( 𝑅 × 𝑆))‘𝑡) = 𝑏) ↔ (((2nd ↾ ( 𝑅 × 𝑆))‘⟨𝑎, 𝑢⟩) = 𝑏 ∧ ¬ ⟨𝑎, 𝑢⟩ ∈ 𝑥)))
8887rexxp 5681 . . . . . . . . . . . . . . . . . . . . . . . 24 (∃𝑡 ∈ (𝑠 × 𝑘)(¬ 𝑡𝑥 ∧ ((2nd ↾ ( 𝑅 × 𝑆))‘𝑡) = 𝑏) ↔ ∃𝑎𝑠𝑢𝑘 (((2nd ↾ ( 𝑅 × 𝑆))‘⟨𝑎, 𝑢⟩) = 𝑏 ∧ ¬ ⟨𝑎, 𝑢⟩ ∈ 𝑥))
8981, 88bitri 278 . . . . . . . . . . . . . . . . . . . . . . 23 (∃𝑡 ∈ ((𝑠 × 𝑘) ∖ 𝑥)((2nd ↾ ( 𝑅 × 𝑆))‘𝑡) = 𝑏 ↔ ∃𝑎𝑠𝑢𝑘 (((2nd ↾ ( 𝑅 × 𝑆))‘⟨𝑎, 𝑢⟩) = 𝑏 ∧ ¬ ⟨𝑎, 𝑢⟩ ∈ 𝑥))
90 simpl 486 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 ((𝑠 𝑅𝑘 𝑆) → 𝑠 𝑅)
9190sselda 3918 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 (((𝑠 𝑅𝑘 𝑆) ∧ 𝑎𝑠) → 𝑎 𝑅)
9291adantr 484 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 ((((𝑠 𝑅𝑘 𝑆) ∧ 𝑎𝑠) ∧ 𝑢𝑘) → 𝑎 𝑅)
93 simplr 768 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 (((𝑠 𝑅𝑘 𝑆) ∧ 𝑎𝑠) → 𝑘 𝑆)
9493sselda 3918 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 ((((𝑠 𝑅𝑘 𝑆) ∧ 𝑎𝑠) ∧ 𝑢𝑘) → 𝑢 𝑆)
9592, 94opelxpd 5561 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ((((𝑠 𝑅𝑘 𝑆) ∧ 𝑎𝑠) ∧ 𝑢𝑘) → ⟨𝑎, 𝑢⟩ ∈ ( 𝑅 × 𝑆))
9695fvresd 6669 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ((((𝑠 𝑅𝑘 𝑆) ∧ 𝑎𝑠) ∧ 𝑢𝑘) → ((2nd ↾ ( 𝑅 × 𝑆))‘⟨𝑎, 𝑢⟩) = (2nd ‘⟨𝑎, 𝑢⟩))
97 vex 3447 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 𝑎 ∈ V
98 vex 3447 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 𝑢 ∈ V
9997, 98op2nd 7684 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 (2nd ‘⟨𝑎, 𝑢⟩) = 𝑢
10096, 99eqtrdi 2852 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ((((𝑠 𝑅𝑘 𝑆) ∧ 𝑎𝑠) ∧ 𝑢𝑘) → ((2nd ↾ ( 𝑅 × 𝑆))‘⟨𝑎, 𝑢⟩) = 𝑢)
101100eqeq1d 2803 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ((((𝑠 𝑅𝑘 𝑆) ∧ 𝑎𝑠) ∧ 𝑢𝑘) → (((2nd ↾ ( 𝑅 × 𝑆))‘⟨𝑎, 𝑢⟩) = 𝑏𝑢 = 𝑏))
102101anbi1d 632 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ((((𝑠 𝑅𝑘 𝑆) ∧ 𝑎𝑠) ∧ 𝑢𝑘) → ((((2nd ↾ ( 𝑅 × 𝑆))‘⟨𝑎, 𝑢⟩) = 𝑏 ∧ ¬ ⟨𝑎, 𝑢⟩ ∈ 𝑥) ↔ (𝑢 = 𝑏 ∧ ¬ ⟨𝑎, 𝑢⟩ ∈ 𝑥)))
103102rexbidva 3258 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (((𝑠 𝑅𝑘 𝑆) ∧ 𝑎𝑠) → (∃𝑢𝑘 (((2nd ↾ ( 𝑅 × 𝑆))‘⟨𝑎, 𝑢⟩) = 𝑏 ∧ ¬ ⟨𝑎, 𝑢⟩ ∈ 𝑥) ↔ ∃𝑢𝑘 (𝑢 = 𝑏 ∧ ¬ ⟨𝑎, 𝑢⟩ ∈ 𝑥)))
104 opeq2 4768 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 (𝑢 = 𝑏 → ⟨𝑎, 𝑢⟩ = ⟨𝑎, 𝑏⟩)
105104eleq1d 2877 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (𝑢 = 𝑏 → (⟨𝑎, 𝑢⟩ ∈ 𝑥 ↔ ⟨𝑎, 𝑏⟩ ∈ 𝑥))
106105notbid 321 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (𝑢 = 𝑏 → (¬ ⟨𝑎, 𝑢⟩ ∈ 𝑥 ↔ ¬ ⟨𝑎, 𝑏⟩ ∈ 𝑥))
107106ceqsrexbv 3601 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (∃𝑢𝑘 (𝑢 = 𝑏 ∧ ¬ ⟨𝑎, 𝑢⟩ ∈ 𝑥) ↔ (𝑏𝑘 ∧ ¬ ⟨𝑎, 𝑏⟩ ∈ 𝑥))
108103, 107syl6bb 290 . . . . . . . . . . . . . . . . . . . . . . . . 25 (((𝑠 𝑅𝑘 𝑆) ∧ 𝑎𝑠) → (∃𝑢𝑘 (((2nd ↾ ( 𝑅 × 𝑆))‘⟨𝑎, 𝑢⟩) = 𝑏 ∧ ¬ ⟨𝑎, 𝑢⟩ ∈ 𝑥) ↔ (𝑏𝑘 ∧ ¬ ⟨𝑎, 𝑏⟩ ∈ 𝑥)))
109108rexbidva 3258 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝑠 𝑅𝑘 𝑆) → (∃𝑎𝑠𝑢𝑘 (((2nd ↾ ( 𝑅 × 𝑆))‘⟨𝑎, 𝑢⟩) = 𝑏 ∧ ¬ ⟨𝑎, 𝑢⟩ ∈ 𝑥) ↔ ∃𝑎𝑠 (𝑏𝑘 ∧ ¬ ⟨𝑎, 𝑏⟩ ∈ 𝑥)))
110 r19.42v 3306 . . . . . . . . . . . . . . . . . . . . . . . 24 (∃𝑎𝑠 (𝑏𝑘 ∧ ¬ ⟨𝑎, 𝑏⟩ ∈ 𝑥) ↔ (𝑏𝑘 ∧ ∃𝑎𝑠 ¬ ⟨𝑎, 𝑏⟩ ∈ 𝑥))
111109, 110syl6bb 290 . . . . . . . . . . . . . . . . . . . . . . 23 ((𝑠 𝑅𝑘 𝑆) → (∃𝑎𝑠𝑢𝑘 (((2nd ↾ ( 𝑅 × 𝑆))‘⟨𝑎, 𝑢⟩) = 𝑏 ∧ ¬ ⟨𝑎, 𝑢⟩ ∈ 𝑥) ↔ (𝑏𝑘 ∧ ∃𝑎𝑠 ¬ ⟨𝑎, 𝑏⟩ ∈ 𝑥)))
11289, 111syl5bb 286 . . . . . . . . . . . . . . . . . . . . . 22 ((𝑠 𝑅𝑘 𝑆) → (∃𝑡 ∈ ((𝑠 × 𝑘) ∖ 𝑥)((2nd ↾ ( 𝑅 × 𝑆))‘𝑡) = 𝑏 ↔ (𝑏𝑘 ∧ ∃𝑎𝑠 ¬ ⟨𝑎, 𝑏⟩ ∈ 𝑥)))
113 f2ndres 7700 . . . . . . . . . . . . . . . . . . . . . . . 24 (2nd ↾ ( 𝑅 × 𝑆)):( 𝑅 × 𝑆)⟶ 𝑆
114 ffn 6491 . . . . . . . . . . . . . . . . . . . . . . . 24 ((2nd ↾ ( 𝑅 × 𝑆)):( 𝑅 × 𝑆)⟶ 𝑆 → (2nd ↾ ( 𝑅 × 𝑆)) Fn ( 𝑅 × 𝑆))
115113, 114ax-mp 5 . . . . . . . . . . . . . . . . . . . . . . 23 (2nd ↾ ( 𝑅 × 𝑆)) Fn ( 𝑅 × 𝑆)
116 difss 4062 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝑠 × 𝑘) ∖ 𝑥) ⊆ (𝑠 × 𝑘)
117 xpss12 5538 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝑠 𝑅𝑘 𝑆) → (𝑠 × 𝑘) ⊆ ( 𝑅 × 𝑆))
118116, 117sstrid 3929 . . . . . . . . . . . . . . . . . . . . . . 23 ((𝑠 𝑅𝑘 𝑆) → ((𝑠 × 𝑘) ∖ 𝑥) ⊆ ( 𝑅 × 𝑆))
119 fvelimab 6716 . . . . . . . . . . . . . . . . . . . . . . 23 (((2nd ↾ ( 𝑅 × 𝑆)) Fn ( 𝑅 × 𝑆) ∧ ((𝑠 × 𝑘) ∖ 𝑥) ⊆ ( 𝑅 × 𝑆)) → (𝑏 ∈ ((2nd ↾ ( 𝑅 × 𝑆)) “ ((𝑠 × 𝑘) ∖ 𝑥)) ↔ ∃𝑡 ∈ ((𝑠 × 𝑘) ∖ 𝑥)((2nd ↾ ( 𝑅 × 𝑆))‘𝑡) = 𝑏))
120115, 118, 119sylancr 590 . . . . . . . . . . . . . . . . . . . . . 22 ((𝑠 𝑅𝑘 𝑆) → (𝑏 ∈ ((2nd ↾ ( 𝑅 × 𝑆)) “ ((𝑠 × 𝑘) ∖ 𝑥)) ↔ ∃𝑡 ∈ ((𝑠 × 𝑘) ∖ 𝑥)((2nd ↾ ( 𝑅 × 𝑆))‘𝑡) = 𝑏))
121 eldif 3894 . . . . . . . . . . . . . . . . . . . . . . 23 (𝑏 ∈ (𝑘 ∖ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) ↔ (𝑏𝑘 ∧ ¬ 𝑏 ∈ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}))
122 simpr 488 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ((𝑠 𝑅𝑘 𝑆) → 𝑘 𝑆)
123122sselda 3918 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (((𝑠 𝑅𝑘 𝑆) ∧ 𝑏𝑘) → 𝑏 𝑆)
124 sneq 4538 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 (𝑣 = 𝑏 → {𝑣} = {𝑏})
125124xpeq2d 5553 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 (𝑣 = 𝑏 → (𝑠 × {𝑣}) = (𝑠 × {𝑏}))
126125sseq1d 3949 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 (𝑣 = 𝑏 → ((𝑠 × {𝑣}) ⊆ 𝑥 ↔ (𝑠 × {𝑏}) ⊆ 𝑥))
127 dfss3 3906 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ((𝑠 × {𝑏}) ⊆ 𝑥 ↔ ∀𝑘 ∈ (𝑠 × {𝑏})𝑘𝑥)
128 eleq1 2880 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 (𝑘 = ⟨𝑎, 𝑡⟩ → (𝑘𝑥 ↔ ⟨𝑎, 𝑡⟩ ∈ 𝑥))
129128ralxp 5680 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 (∀𝑘 ∈ (𝑠 × {𝑏})𝑘𝑥 ↔ ∀𝑎𝑠𝑡 ∈ {𝑏}⟨𝑎, 𝑡⟩ ∈ 𝑥)
130 vex 3447 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 𝑏 ∈ V
131 opeq2 4768 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 (𝑡 = 𝑏 → ⟨𝑎, 𝑡⟩ = ⟨𝑎, 𝑏⟩)
132131eleq1d 2877 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 (𝑡 = 𝑏 → (⟨𝑎, 𝑡⟩ ∈ 𝑥 ↔ ⟨𝑎, 𝑏⟩ ∈ 𝑥))
133130, 132ralsn 4582 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 (∀𝑡 ∈ {𝑏}⟨𝑎, 𝑡⟩ ∈ 𝑥 ↔ ⟨𝑎, 𝑏⟩ ∈ 𝑥)
134133ralbii 3136 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 (∀𝑎𝑠𝑡 ∈ {𝑏}⟨𝑎, 𝑡⟩ ∈ 𝑥 ↔ ∀𝑎𝑠𝑎, 𝑏⟩ ∈ 𝑥)
135127, 129, 1343bitri 300 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ((𝑠 × {𝑏}) ⊆ 𝑥 ↔ ∀𝑎𝑠𝑎, 𝑏⟩ ∈ 𝑥)
136126, 135syl6bb 290 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (𝑣 = 𝑏 → ((𝑠 × {𝑣}) ⊆ 𝑥 ↔ ∀𝑎𝑠𝑎, 𝑏⟩ ∈ 𝑥))
137136elrab3 3632 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (𝑏 𝑆 → (𝑏 ∈ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥} ↔ ∀𝑎𝑠𝑎, 𝑏⟩ ∈ 𝑥))
138123, 137syl 17 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (((𝑠 𝑅𝑘 𝑆) ∧ 𝑏𝑘) → (𝑏 ∈ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥} ↔ ∀𝑎𝑠𝑎, 𝑏⟩ ∈ 𝑥))
139138notbid 321 . . . . . . . . . . . . . . . . . . . . . . . . 25 (((𝑠 𝑅𝑘 𝑆) ∧ 𝑏𝑘) → (¬ 𝑏 ∈ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥} ↔ ¬ ∀𝑎𝑠𝑎, 𝑏⟩ ∈ 𝑥))
140 rexnal 3204 . . . . . . . . . . . . . . . . . . . . . . . . 25 (∃𝑎𝑠 ¬ ⟨𝑎, 𝑏⟩ ∈ 𝑥 ↔ ¬ ∀𝑎𝑠𝑎, 𝑏⟩ ∈ 𝑥)
141139, 140syl6bbr 292 . . . . . . . . . . . . . . . . . . . . . . . 24 (((𝑠 𝑅𝑘 𝑆) ∧ 𝑏𝑘) → (¬ 𝑏 ∈ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥} ↔ ∃𝑎𝑠 ¬ ⟨𝑎, 𝑏⟩ ∈ 𝑥))
142141pm5.32da 582 . . . . . . . . . . . . . . . . . . . . . . 23 ((𝑠 𝑅𝑘 𝑆) → ((𝑏𝑘 ∧ ¬ 𝑏 ∈ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) ↔ (𝑏𝑘 ∧ ∃𝑎𝑠 ¬ ⟨𝑎, 𝑏⟩ ∈ 𝑥)))
143121, 142syl5bb 286 . . . . . . . . . . . . . . . . . . . . . 22 ((𝑠 𝑅𝑘 𝑆) → (𝑏 ∈ (𝑘 ∖ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) ↔ (𝑏𝑘 ∧ ∃𝑎𝑠 ¬ ⟨𝑎, 𝑏⟩ ∈ 𝑥)))
144112, 120, 1433bitr4d 314 . . . . . . . . . . . . . . . . . . . . 21 ((𝑠 𝑅𝑘 𝑆) → (𝑏 ∈ ((2nd ↾ ( 𝑅 × 𝑆)) “ ((𝑠 × 𝑘) ∖ 𝑥)) ↔ 𝑏 ∈ (𝑘 ∖ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥})))
145144eqrdv 2799 . . . . . . . . . . . . . . . . . . . 20 ((𝑠 𝑅𝑘 𝑆) → ((2nd ↾ ( 𝑅 × 𝑆)) “ ((𝑠 × 𝑘) ∖ 𝑥)) = (𝑘 ∖ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}))
14674, 76, 145syl2anc 587 . . . . . . . . . . . . . . . . . . 19 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → ((2nd ↾ ( 𝑅 × 𝑆)) “ ((𝑠 × 𝑘) ∖ 𝑥)) = (𝑘 ∖ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}))
147 difin 4191 . . . . . . . . . . . . . . . . . . . 20 (𝑘 ∖ (𝑘 ∩ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥})) = (𝑘 ∖ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥})
14865adantr 484 . . . . . . . . . . . . . . . . . . . . . 22 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → 𝑆 ∈ Top)
14924restuni 21770 . . . . . . . . . . . . . . . . . . . . . 22 ((𝑆 ∈ Top ∧ 𝑘 𝑆) → 𝑘 = (𝑆t 𝑘))
150148, 76, 149syl2anc 587 . . . . . . . . . . . . . . . . . . . . 21 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → 𝑘 = (𝑆t 𝑘))
151150difeq1d 4052 . . . . . . . . . . . . . . . . . . . 20 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → (𝑘 ∖ (𝑘 ∩ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥})) = ( (𝑆t 𝑘) ∖ (𝑘 ∩ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥})))
152147, 151syl5eqr 2850 . . . . . . . . . . . . . . . . . . 19 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → (𝑘 ∖ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) = ( (𝑆t 𝑘) ∖ (𝑘 ∩ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥})))
153146, 152eqtrd 2836 . . . . . . . . . . . . . . . . . 18 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → ((2nd ↾ ( 𝑅 × 𝑆)) “ ((𝑠 × 𝑘) ∖ 𝑥)) = ( (𝑆t 𝑘) ∖ (𝑘 ∩ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥})))
15415ad2antrr 725 . . . . . . . . . . . . . . . . . . . . 21 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → 𝑆 ∈ (ran 𝑘Gen ∩ Haus))
155154elin2d 4129 . . . . . . . . . . . . . . . . . . . 20 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → 𝑆 ∈ Haus)
156 df-ima 5536 . . . . . . . . . . . . . . . . . . . . . . 23 ((2nd ↾ ( 𝑅 × 𝑆)) “ ((𝑠 × 𝑘) ∖ 𝑥)) = ran ((2nd ↾ ( 𝑅 × 𝑆)) ↾ ((𝑠 × 𝑘) ∖ 𝑥))
157 resres 5835 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((2nd ↾ ( 𝑅 × 𝑆)) ↾ ((𝑠 × 𝑘) ∖ 𝑥)) = (2nd ↾ (( 𝑅 × 𝑆) ∩ ((𝑠 × 𝑘) ∖ 𝑥)))
158 inss2 4159 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (( 𝑅 × 𝑆) ∩ ((𝑠 × 𝑘) ∖ 𝑥)) ⊆ ((𝑠 × 𝑘) ∖ 𝑥)
159158, 116sstri 3927 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (( 𝑅 × 𝑆) ∩ ((𝑠 × 𝑘) ∖ 𝑥)) ⊆ (𝑠 × 𝑘)
160 ssres2 5850 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((( 𝑅 × 𝑆) ∩ ((𝑠 × 𝑘) ∖ 𝑥)) ⊆ (𝑠 × 𝑘) → (2nd ↾ (( 𝑅 × 𝑆) ∩ ((𝑠 × 𝑘) ∖ 𝑥))) ⊆ (2nd ↾ (𝑠 × 𝑘)))
161159, 160ax-mp 5 . . . . . . . . . . . . . . . . . . . . . . . . 25 (2nd ↾ (( 𝑅 × 𝑆) ∩ ((𝑠 × 𝑘) ∖ 𝑥))) ⊆ (2nd ↾ (𝑠 × 𝑘))
162157, 161eqsstri 3952 . . . . . . . . . . . . . . . . . . . . . . . 24 ((2nd ↾ ( 𝑅 × 𝑆)) ↾ ((𝑠 × 𝑘) ∖ 𝑥)) ⊆ (2nd ↾ (𝑠 × 𝑘))
163162rnssi 5778 . . . . . . . . . . . . . . . . . . . . . . 23 ran ((2nd ↾ ( 𝑅 × 𝑆)) ↾ ((𝑠 × 𝑘) ∖ 𝑥)) ⊆ ran (2nd ↾ (𝑠 × 𝑘))
164156, 163eqsstri 3952 . . . . . . . . . . . . . . . . . . . . . 22 ((2nd ↾ ( 𝑅 × 𝑆)) “ ((𝑠 × 𝑘) ∖ 𝑥)) ⊆ ran (2nd ↾ (𝑠 × 𝑘))
165 f2ndres 7700 . . . . . . . . . . . . . . . . . . . . . . 23 (2nd ↾ (𝑠 × 𝑘)):(𝑠 × 𝑘)⟶𝑘
166 frn 6497 . . . . . . . . . . . . . . . . . . . . . . 23 ((2nd ↾ (𝑠 × 𝑘)):(𝑠 × 𝑘)⟶𝑘 → ran (2nd ↾ (𝑠 × 𝑘)) ⊆ 𝑘)
167165, 166ax-mp 5 . . . . . . . . . . . . . . . . . . . . . 22 ran (2nd ↾ (𝑠 × 𝑘)) ⊆ 𝑘
168164, 167sstri 3927 . . . . . . . . . . . . . . . . . . . . 21 ((2nd ↾ ( 𝑅 × 𝑆)) “ ((𝑠 × 𝑘) ∖ 𝑥)) ⊆ 𝑘
169168, 76sstrid 3929 . . . . . . . . . . . . . . . . . . . 20 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → ((2nd ↾ ( 𝑅 × 𝑆)) “ ((𝑠 × 𝑘) ∖ 𝑥)) ⊆ 𝑆)
17012ad2antrr 725 . . . . . . . . . . . . . . . . . . . . . 22 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → 𝑅 ∈ (TopOn‘ 𝑅))
171148, 17sylib 221 . . . . . . . . . . . . . . . . . . . . . 22 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → 𝑆 ∈ (TopOn‘ 𝑆))
172 tx2cn 22218 . . . . . . . . . . . . . . . . . . . . . 22 ((𝑅 ∈ (TopOn‘ 𝑅) ∧ 𝑆 ∈ (TopOn‘ 𝑆)) → (2nd ↾ ( 𝑅 × 𝑆)) ∈ ((𝑅 ×t 𝑆) Cn 𝑆))
173170, 171, 172syl2anc 587 . . . . . . . . . . . . . . . . . . . . 21 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → (2nd ↾ ( 𝑅 × 𝑆)) ∈ ((𝑅 ×t 𝑆) Cn 𝑆))
17427ad2antrr 725 . . . . . . . . . . . . . . . . . . . . . . 23 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → (𝑅 ×t 𝑆) ∈ Top)
175116a1i 11 . . . . . . . . . . . . . . . . . . . . . . 23 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → ((𝑠 × 𝑘) ∖ 𝑥) ⊆ (𝑠 × 𝑘))
176 vex 3447 . . . . . . . . . . . . . . . . . . . . . . . . 25 𝑠 ∈ V
177 vex 3447 . . . . . . . . . . . . . . . . . . . . . . . . 25 𝑘 ∈ V
178176, 177xpex 7460 . . . . . . . . . . . . . . . . . . . . . . . 24 (𝑠 × 𝑘) ∈ V
179178a1i 11 . . . . . . . . . . . . . . . . . . . . . . 23 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → (𝑠 × 𝑘) ∈ V)
180 restabs 21773 . . . . . . . . . . . . . . . . . . . . . . 23 (((𝑅 ×t 𝑆) ∈ Top ∧ ((𝑠 × 𝑘) ∖ 𝑥) ⊆ (𝑠 × 𝑘) ∧ (𝑠 × 𝑘) ∈ V) → (((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘)) ↾t ((𝑠 × 𝑘) ∖ 𝑥)) = ((𝑅 ×t 𝑆) ↾t ((𝑠 × 𝑘) ∖ 𝑥)))
181174, 175, 179, 180syl3anc 1368 . . . . . . . . . . . . . . . . . . . . . 22 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → (((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘)) ↾t ((𝑠 × 𝑘) ∖ 𝑥)) = ((𝑅 ×t 𝑆) ↾t ((𝑠 × 𝑘) ∖ 𝑥)))
18264adantr 484 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → 𝑅 ∈ Top)
183154, 4syl 17 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → 𝑆 ∈ Top)
184176a1i 11 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → 𝑠 ∈ V)
185 simprl 770 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → 𝑘 ∈ 𝒫 𝑆)
186 txrest 22239 . . . . . . . . . . . . . . . . . . . . . . . . 25 (((𝑅 ∈ Top ∧ 𝑆 ∈ Top) ∧ (𝑠 ∈ V ∧ 𝑘 ∈ 𝒫 𝑆)) → ((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘)) = ((𝑅t 𝑠) ×t (𝑆t 𝑘)))
187182, 183, 184, 185, 186syl22anc 837 . . . . . . . . . . . . . . . . . . . . . . . 24 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → ((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘)) = ((𝑅t 𝑠) ×t (𝑆t 𝑘)))
188 simprr3 1220 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → (𝑅t 𝑠) ∈ Comp)
189188adantr 484 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → (𝑅t 𝑠) ∈ Comp)
190 simprr 772 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → (𝑆t 𝑘) ∈ Comp)
191 txcmp 22251 . . . . . . . . . . . . . . . . . . . . . . . . 25 (((𝑅t 𝑠) ∈ Comp ∧ (𝑆t 𝑘) ∈ Comp) → ((𝑅t 𝑠) ×t (𝑆t 𝑘)) ∈ Comp)
192189, 190, 191syl2anc 587 . . . . . . . . . . . . . . . . . . . . . . . 24 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → ((𝑅t 𝑠) ×t (𝑆t 𝑘)) ∈ Comp)
193187, 192eqeltrd 2893 . . . . . . . . . . . . . . . . . . . . . . 23 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → ((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘)) ∈ Comp)
194 difin 4191 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((𝑠 × 𝑘) ∖ ((𝑠 × 𝑘) ∩ 𝑥)) = ((𝑠 × 𝑘) ∖ 𝑥)
19574, 76, 117syl2anc 587 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → (𝑠 × 𝑘) ⊆ ( 𝑅 × 𝑆))
196182, 148, 25syl2anc 587 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → ( 𝑅 × 𝑆) = (𝑅 ×t 𝑆))
197195, 196sseqtrd 3958 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → (𝑠 × 𝑘) ⊆ (𝑅 ×t 𝑆))
19828restuni 21770 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (((𝑅 ×t 𝑆) ∈ Top ∧ (𝑠 × 𝑘) ⊆ (𝑅 ×t 𝑆)) → (𝑠 × 𝑘) = ((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘)))
199174, 197, 198syl2anc 587 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → (𝑠 × 𝑘) = ((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘)))
200199difeq1d 4052 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → ((𝑠 × 𝑘) ∖ ((𝑠 × 𝑘) ∩ 𝑥)) = ( ((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘)) ∖ ((𝑠 × 𝑘) ∩ 𝑥)))
201194, 200syl5eqr 2850 . . . . . . . . . . . . . . . . . . . . . . . 24 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → ((𝑠 × 𝑘) ∖ 𝑥) = ( ((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘)) ∖ ((𝑠 × 𝑘) ∩ 𝑥)))
202 resttop 21768 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (((𝑅 ×t 𝑆) ∈ Top ∧ (𝑠 × 𝑘) ∈ V) → ((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘)) ∈ Top)
203174, 178, 202sylancl 589 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → ((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘)) ∈ Top)
204 incom 4131 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((𝑠 × 𝑘) ∩ 𝑥) = (𝑥 ∩ (𝑠 × 𝑘))
20520ad2antrr 725 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆)))
206 kgeni 22145 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ((𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆)) ∧ ((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘)) ∈ Comp) → (𝑥 ∩ (𝑠 × 𝑘)) ∈ ((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘)))
207205, 193, 206syl2anc 587 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → (𝑥 ∩ (𝑠 × 𝑘)) ∈ ((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘)))
208204, 207eqeltrid 2897 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → ((𝑠 × 𝑘) ∩ 𝑥) ∈ ((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘)))
209 eqid 2801 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘)) = ((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘))
210209opncld 21641 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘)) ∈ Top ∧ ((𝑠 × 𝑘) ∩ 𝑥) ∈ ((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘))) → ( ((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘)) ∖ ((𝑠 × 𝑘) ∩ 𝑥)) ∈ (Clsd‘((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘))))
211203, 208, 210syl2anc 587 . . . . . . . . . . . . . . . . . . . . . . . 24 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → ( ((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘)) ∖ ((𝑠 × 𝑘) ∩ 𝑥)) ∈ (Clsd‘((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘))))
212201, 211eqeltrd 2893 . . . . . . . . . . . . . . . . . . . . . . 23 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → ((𝑠 × 𝑘) ∖ 𝑥) ∈ (Clsd‘((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘))))
213 cmpcld 22010 . . . . . . . . . . . . . . . . . . . . . . 23 ((((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘)) ∈ Comp ∧ ((𝑠 × 𝑘) ∖ 𝑥) ∈ (Clsd‘((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘)))) → (((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘)) ↾t ((𝑠 × 𝑘) ∖ 𝑥)) ∈ Comp)
214193, 212, 213syl2anc 587 . . . . . . . . . . . . . . . . . . . . . 22 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → (((𝑅 ×t 𝑆) ↾t (𝑠 × 𝑘)) ↾t ((𝑠 × 𝑘) ∖ 𝑥)) ∈ Comp)
215181, 214eqeltrrd 2894 . . . . . . . . . . . . . . . . . . . . 21 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → ((𝑅 ×t 𝑆) ↾t ((𝑠 × 𝑘) ∖ 𝑥)) ∈ Comp)
216 imacmp 22005 . . . . . . . . . . . . . . . . . . . . 21 (((2nd ↾ ( 𝑅 × 𝑆)) ∈ ((𝑅 ×t 𝑆) Cn 𝑆) ∧ ((𝑅 ×t 𝑆) ↾t ((𝑠 × 𝑘) ∖ 𝑥)) ∈ Comp) → (𝑆t ((2nd ↾ ( 𝑅 × 𝑆)) “ ((𝑠 × 𝑘) ∖ 𝑥))) ∈ Comp)
217173, 215, 216syl2anc 587 . . . . . . . . . . . . . . . . . . . 20 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → (𝑆t ((2nd ↾ ( 𝑅 × 𝑆)) “ ((𝑠 × 𝑘) ∖ 𝑥))) ∈ Comp)
21824hauscmp 22015 . . . . . . . . . . . . . . . . . . . 20 ((𝑆 ∈ Haus ∧ ((2nd ↾ ( 𝑅 × 𝑆)) “ ((𝑠 × 𝑘) ∖ 𝑥)) ⊆ 𝑆 ∧ (𝑆t ((2nd ↾ ( 𝑅 × 𝑆)) “ ((𝑠 × 𝑘) ∖ 𝑥))) ∈ Comp) → ((2nd ↾ ( 𝑅 × 𝑆)) “ ((𝑠 × 𝑘) ∖ 𝑥)) ∈ (Clsd‘𝑆))
219155, 169, 217, 218syl3anc 1368 . . . . . . . . . . . . . . . . . . 19 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → ((2nd ↾ ( 𝑅 × 𝑆)) “ ((𝑠 × 𝑘) ∖ 𝑥)) ∈ (Clsd‘𝑆))
220168a1i 11 . . . . . . . . . . . . . . . . . . 19 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → ((2nd ↾ ( 𝑅 × 𝑆)) “ ((𝑠 × 𝑘) ∖ 𝑥)) ⊆ 𝑘)
22124restcldi 21781 . . . . . . . . . . . . . . . . . . 19 ((𝑘 𝑆 ∧ ((2nd ↾ ( 𝑅 × 𝑆)) “ ((𝑠 × 𝑘) ∖ 𝑥)) ∈ (Clsd‘𝑆) ∧ ((2nd ↾ ( 𝑅 × 𝑆)) “ ((𝑠 × 𝑘) ∖ 𝑥)) ⊆ 𝑘) → ((2nd ↾ ( 𝑅 × 𝑆)) “ ((𝑠 × 𝑘) ∖ 𝑥)) ∈ (Clsd‘(𝑆t 𝑘)))
22276, 219, 220, 221syl3anc 1368 . . . . . . . . . . . . . . . . . 18 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → ((2nd ↾ ( 𝑅 × 𝑆)) “ ((𝑠 × 𝑘) ∖ 𝑥)) ∈ (Clsd‘(𝑆t 𝑘)))
223153, 222eqeltrrd 2894 . . . . . . . . . . . . . . . . 17 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → ( (𝑆t 𝑘) ∖ (𝑘 ∩ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥})) ∈ (Clsd‘(𝑆t 𝑘)))
224 resttop 21768 . . . . . . . . . . . . . . . . . . 19 ((𝑆 ∈ Top ∧ 𝑘 ∈ 𝒫 𝑆) → (𝑆t 𝑘) ∈ Top)
225148, 185, 224syl2anc 587 . . . . . . . . . . . . . . . . . 18 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → (𝑆t 𝑘) ∈ Top)
226 inss1 4158 . . . . . . . . . . . . . . . . . . 19 (𝑘 ∩ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) ⊆ 𝑘
227226, 150sseqtrid 3970 . . . . . . . . . . . . . . . . . 18 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → (𝑘 ∩ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) ⊆ (𝑆t 𝑘))
228 eqid 2801 . . . . . . . . . . . . . . . . . . 19 (𝑆t 𝑘) = (𝑆t 𝑘)
229228isopn2 21640 . . . . . . . . . . . . . . . . . 18 (((𝑆t 𝑘) ∈ Top ∧ (𝑘 ∩ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) ⊆ (𝑆t 𝑘)) → ((𝑘 ∩ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) ∈ (𝑆t 𝑘) ↔ ( (𝑆t 𝑘) ∖ (𝑘 ∩ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥})) ∈ (Clsd‘(𝑆t 𝑘))))
230225, 227, 229syl2anc 587 . . . . . . . . . . . . . . . . 17 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → ((𝑘 ∩ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) ∈ (𝑆t 𝑘) ↔ ( (𝑆t 𝑘) ∖ (𝑘 ∩ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥})) ∈ (Clsd‘(𝑆t 𝑘))))
231223, 230mpbird 260 . . . . . . . . . . . . . . . 16 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → (𝑘 ∩ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) ∈ (𝑆t 𝑘))
23269, 231eqeltrid 2897 . . . . . . . . . . . . . . 15 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ (𝑘 ∈ 𝒫 𝑆 ∧ (𝑆t 𝑘) ∈ Comp)) → ({𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥} ∩ 𝑘) ∈ (𝑆t 𝑘))
233232expr 460 . . . . . . . . . . . . . 14 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ 𝑘 ∈ 𝒫 𝑆) → ((𝑆t 𝑘) ∈ Comp → ({𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥} ∩ 𝑘) ∈ (𝑆t 𝑘)))
234233ralrimiva 3152 . . . . . . . . . . . . 13 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → ∀𝑘 ∈ 𝒫 𝑆((𝑆t 𝑘) ∈ Comp → ({𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥} ∩ 𝑘) ∈ (𝑆t 𝑘)))
23565, 17sylib 221 . . . . . . . . . . . . . 14 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → 𝑆 ∈ (TopOn‘ 𝑆))
236 elkgen 22144 . . . . . . . . . . . . . 14 (𝑆 ∈ (TopOn‘ 𝑆) → ({𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥} ∈ (𝑘Gen‘𝑆) ↔ ({𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥} ⊆ 𝑆 ∧ ∀𝑘 ∈ 𝒫 𝑆((𝑆t 𝑘) ∈ Comp → ({𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥} ∩ 𝑘) ∈ (𝑆t 𝑘)))))
237235, 236syl 17 . . . . . . . . . . . . 13 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → ({𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥} ∈ (𝑘Gen‘𝑆) ↔ ({𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥} ⊆ 𝑆 ∧ ∀𝑘 ∈ 𝒫 𝑆((𝑆t 𝑘) ∈ Comp → ({𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥} ∩ 𝑘) ∈ (𝑆t 𝑘)))))
23868, 234, 237mpbir2and 712 . . . . . . . . . . . 12 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥} ∈ (𝑘Gen‘𝑆))
23915adantr 484 . . . . . . . . . . . . . 14 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → 𝑆 ∈ (ran 𝑘Gen ∩ Haus))
240239, 2syl 17 . . . . . . . . . . . . 13 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → 𝑆 ∈ ran 𝑘Gen)
241 kgenidm 22155 . . . . . . . . . . . . 13 (𝑆 ∈ ran 𝑘Gen → (𝑘Gen‘𝑆) = 𝑆)
242240, 241syl 17 . . . . . . . . . . . 12 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → (𝑘Gen‘𝑆) = 𝑆)
243238, 242eleqtrd 2895 . . . . . . . . . . 11 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥} ∈ 𝑆)
244 txopn 22210 . . . . . . . . . . 11 (((𝑅 ∈ Top ∧ 𝑆 ∈ Top) ∧ (𝑢𝑅 ∧ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥} ∈ 𝑆)) → (𝑢 × {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) ∈ (𝑅 ×t 𝑆))
24564, 65, 66, 243, 244syl22anc 837 . . . . . . . . . 10 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → (𝑢 × {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) ∈ (𝑅 ×t 𝑆))
24659adantr 484 . . . . . . . . . . 11 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → 𝑦 = ⟨(1st𝑦), (2nd𝑦)⟩)
247 simprr1 1218 . . . . . . . . . . . 12 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → (1st𝑦) ∈ 𝑢)
248 sneq 4538 . . . . . . . . . . . . . . 15 (𝑣 = (2nd𝑦) → {𝑣} = {(2nd𝑦)})
249248xpeq2d 5553 . . . . . . . . . . . . . 14 (𝑣 = (2nd𝑦) → (𝑠 × {𝑣}) = (𝑠 × {(2nd𝑦)}))
250249sseq1d 3949 . . . . . . . . . . . . 13 (𝑣 = (2nd𝑦) → ((𝑠 × {𝑣}) ⊆ 𝑥 ↔ (𝑠 × {(2nd𝑦)}) ⊆ 𝑥))
25134adantr 484 . . . . . . . . . . . . 13 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → (2nd𝑦) ∈ 𝑆)
252 relxp 5541 . . . . . . . . . . . . . . 15 Rel (𝑠 × {(2nd𝑦)})
253252a1i 11 . . . . . . . . . . . . . 14 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → Rel (𝑠 × {(2nd𝑦)}))
254 opelxp 5559 . . . . . . . . . . . . . . 15 (⟨𝑎, 𝑏⟩ ∈ (𝑠 × {(2nd𝑦)}) ↔ (𝑎𝑠𝑏 ∈ {(2nd𝑦)}))
25571sselda 3918 . . . . . . . . . . . . . . . . . 18 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ 𝑎𝑠) → 𝑎 ∈ {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥})
256 opeq1 4766 . . . . . . . . . . . . . . . . . . . . 21 (𝑡 = 𝑎 → ⟨𝑡, (2nd𝑦)⟩ = ⟨𝑎, (2nd𝑦)⟩)
257256eleq1d 2877 . . . . . . . . . . . . . . . . . . . 20 (𝑡 = 𝑎 → (⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥 ↔ ⟨𝑎, (2nd𝑦)⟩ ∈ 𝑥))
258257elrab 3631 . . . . . . . . . . . . . . . . . . 19 (𝑎 ∈ {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ↔ (𝑎 𝑅 ∧ ⟨𝑎, (2nd𝑦)⟩ ∈ 𝑥))
259258simprbi 500 . . . . . . . . . . . . . . . . . 18 (𝑎 ∈ {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} → ⟨𝑎, (2nd𝑦)⟩ ∈ 𝑥)
260255, 259syl 17 . . . . . . . . . . . . . . . . 17 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ 𝑎𝑠) → ⟨𝑎, (2nd𝑦)⟩ ∈ 𝑥)
261 elsni 4545 . . . . . . . . . . . . . . . . . . 19 (𝑏 ∈ {(2nd𝑦)} → 𝑏 = (2nd𝑦))
262261opeq2d 4775 . . . . . . . . . . . . . . . . . 18 (𝑏 ∈ {(2nd𝑦)} → ⟨𝑎, 𝑏⟩ = ⟨𝑎, (2nd𝑦)⟩)
263262eleq1d 2877 . . . . . . . . . . . . . . . . 17 (𝑏 ∈ {(2nd𝑦)} → (⟨𝑎, 𝑏⟩ ∈ 𝑥 ↔ ⟨𝑎, (2nd𝑦)⟩ ∈ 𝑥))
264260, 263syl5ibrcom 250 . . . . . . . . . . . . . . . 16 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ 𝑎𝑠) → (𝑏 ∈ {(2nd𝑦)} → ⟨𝑎, 𝑏⟩ ∈ 𝑥))
265264expimpd 457 . . . . . . . . . . . . . . 15 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → ((𝑎𝑠𝑏 ∈ {(2nd𝑦)}) → ⟨𝑎, 𝑏⟩ ∈ 𝑥))
266254, 265syl5bi 245 . . . . . . . . . . . . . 14 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → (⟨𝑎, 𝑏⟩ ∈ (𝑠 × {(2nd𝑦)}) → ⟨𝑎, 𝑏⟩ ∈ 𝑥))
267253, 266relssdv 5629 . . . . . . . . . . . . 13 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → (𝑠 × {(2nd𝑦)}) ⊆ 𝑥)
268250, 251, 267elrabd 3633 . . . . . . . . . . . 12 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → (2nd𝑦) ∈ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥})
269247, 268opelxpd 5561 . . . . . . . . . . 11 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → ⟨(1st𝑦), (2nd𝑦)⟩ ∈ (𝑢 × {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}))
270246, 269eqeltrd 2893 . . . . . . . . . 10 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → 𝑦 ∈ (𝑢 × {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}))
271 relxp 5541 . . . . . . . . . . . 12 Rel (𝑢 × {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥})
272271a1i 11 . . . . . . . . . . 11 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → Rel (𝑢 × {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}))
273 opelxp 5559 . . . . . . . . . . . 12 (⟨𝑎, 𝑏⟩ ∈ (𝑢 × {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) ↔ (𝑎𝑢𝑏 ∈ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}))
274126elrab 3631 . . . . . . . . . . . . . . 15 (𝑏 ∈ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥} ↔ (𝑏 𝑆 ∧ (𝑠 × {𝑏}) ⊆ 𝑥))
275274simprbi 500 . . . . . . . . . . . . . 14 (𝑏 ∈ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥} → (𝑠 × {𝑏}) ⊆ 𝑥)
276 simprr2 1219 . . . . . . . . . . . . . . . 16 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → 𝑢𝑠)
277276sselda 3918 . . . . . . . . . . . . . . 15 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ 𝑎𝑢) → 𝑎𝑠)
278 vsnid 4565 . . . . . . . . . . . . . . 15 𝑏 ∈ {𝑏}
279 opelxpi 5560 . . . . . . . . . . . . . . 15 ((𝑎𝑠𝑏 ∈ {𝑏}) → ⟨𝑎, 𝑏⟩ ∈ (𝑠 × {𝑏}))
280277, 278, 279sylancl 589 . . . . . . . . . . . . . 14 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ 𝑎𝑢) → ⟨𝑎, 𝑏⟩ ∈ (𝑠 × {𝑏}))
281 ssel 3911 . . . . . . . . . . . . . 14 ((𝑠 × {𝑏}) ⊆ 𝑥 → (⟨𝑎, 𝑏⟩ ∈ (𝑠 × {𝑏}) → ⟨𝑎, 𝑏⟩ ∈ 𝑥))
282275, 280, 281syl2imc 41 . . . . . . . . . . . . 13 ((((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) ∧ 𝑎𝑢) → (𝑏 ∈ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥} → ⟨𝑎, 𝑏⟩ ∈ 𝑥))
283282expimpd 457 . . . . . . . . . . . 12 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → ((𝑎𝑢𝑏 ∈ {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) → ⟨𝑎, 𝑏⟩ ∈ 𝑥))
284273, 283syl5bi 245 . . . . . . . . . . 11 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → (⟨𝑎, 𝑏⟩ ∈ (𝑢 × {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) → ⟨𝑎, 𝑏⟩ ∈ 𝑥))
285272, 284relssdv 5629 . . . . . . . . . 10 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → (𝑢 × {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) ⊆ 𝑥)
286 eleq2 2881 . . . . . . . . . . . 12 (𝑡 = (𝑢 × {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) → (𝑦𝑡𝑦 ∈ (𝑢 × {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥})))
287 sseq1 3943 . . . . . . . . . . . 12 (𝑡 = (𝑢 × {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) → (𝑡𝑥 ↔ (𝑢 × {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) ⊆ 𝑥))
288286, 287anbi12d 633 . . . . . . . . . . 11 (𝑡 = (𝑢 × {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) → ((𝑦𝑡𝑡𝑥) ↔ (𝑦 ∈ (𝑢 × {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) ∧ (𝑢 × {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) ⊆ 𝑥)))
289288rspcev 3574 . . . . . . . . . 10 (((𝑢 × {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) ∈ (𝑅 ×t 𝑆) ∧ (𝑦 ∈ (𝑢 × {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) ∧ (𝑢 × {𝑣 𝑆 ∣ (𝑠 × {𝑣}) ⊆ 𝑥}) ⊆ 𝑥)) → ∃𝑡 ∈ (𝑅 ×t 𝑆)(𝑦𝑡𝑡𝑥))
290245, 270, 285, 289syl12anc 835 . . . . . . . . 9 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ ((𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅) ∧ ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp))) → ∃𝑡 ∈ (𝑅 ×t 𝑆)(𝑦𝑡𝑡𝑥))
291290expr 460 . . . . . . . 8 (((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) ∧ (𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥} ∧ 𝑢𝑅)) → (((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp) → ∃𝑡 ∈ (𝑅 ×t 𝑆)(𝑦𝑡𝑡𝑥)))
292291rexlimdvva 3256 . . . . . . 7 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → (∃𝑠 ∈ 𝒫 {𝑡 𝑅 ∣ ⟨𝑡, (2nd𝑦)⟩ ∈ 𝑥}∃𝑢𝑅 ((1st𝑦) ∈ 𝑢𝑢𝑠 ∧ (𝑅t 𝑠) ∈ Comp) → ∃𝑡 ∈ (𝑅 ×t 𝑆)(𝑦𝑡𝑡𝑥)))
29363, 292mpd 15 . . . . . 6 ((((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) ∧ 𝑦𝑥) → ∃𝑡 ∈ (𝑅 ×t 𝑆)(𝑦𝑡𝑡𝑥))
294293ralrimiva 3152 . . . . 5 (((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) → ∀𝑦𝑥𝑡 ∈ (𝑅 ×t 𝑆)(𝑦𝑡𝑡𝑥))
2956adantr 484 . . . . . 6 (((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) → (𝑅 ×t 𝑆) ∈ Top)
296 eltop2 21583 . . . . . 6 ((𝑅 ×t 𝑆) ∈ Top → (𝑥 ∈ (𝑅 ×t 𝑆) ↔ ∀𝑦𝑥𝑡 ∈ (𝑅 ×t 𝑆)(𝑦𝑡𝑡𝑥)))
297295, 296syl 17 . . . . 5 (((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) → (𝑥 ∈ (𝑅 ×t 𝑆) ↔ ∀𝑦𝑥𝑡 ∈ (𝑅 ×t 𝑆)(𝑦𝑡𝑡𝑥)))
298294, 297mpbird 260 . . . 4 (((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) ∧ 𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆))) → 𝑥 ∈ (𝑅 ×t 𝑆))
299298ex 416 . . 3 ((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) → (𝑥 ∈ (𝑘Gen‘(𝑅 ×t 𝑆)) → 𝑥 ∈ (𝑅 ×t 𝑆)))
300299ssrdv 3924 . 2 ((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) → (𝑘Gen‘(𝑅 ×t 𝑆)) ⊆ (𝑅 ×t 𝑆))
301 iskgen2 22156 . 2 ((𝑅 ×t 𝑆) ∈ ran 𝑘Gen ↔ ((𝑅 ×t 𝑆) ∈ Top ∧ (𝑘Gen‘(𝑅 ×t 𝑆)) ⊆ (𝑅 ×t 𝑆)))
3026, 300, 301sylanbrc 586 1 ((𝑅 ∈ 𝑛-Locally Comp ∧ 𝑆 ∈ (ran 𝑘Gen ∩ Haus)) → (𝑅 ×t 𝑆) ∈ ran 𝑘Gen)
 Colors of variables: wff setvar class Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 209   ∧ wa 399   ∧ w3a 1084   = wceq 1538   ∈ wcel 2112  ∀wral 3109  ∃wrex 3110  {crab 3113  Vcvv 3444   ∖ cdif 3881   ∩ cin 3883   ⊆ wss 3884  𝒫 cpw 4500  {csn 4528  ⟨cop 4534  ∪ cuni 4803   ↦ cmpt 5113   I cid 5427   × cxp 5521  ◡ccnv 5522  ran crn 5524   ↾ cres 5525   “ cima 5526  Rel wrel 5528   Fn wfn 6323  ⟶wf 6324  ‘cfv 6328  (class class class)co 7139  1st c1st 7673  2nd c2nd 7674   ↾t crest 16689  Topctop 21501  TopOnctopon 21518  Clsdccld 21624   Cn ccn 21832  Hauscha 21916  Compccmp 21994  𝑛-Locally cnlly 22073  𝑘Genckgen 22141   ×t ctx 22168 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2114  ax-9 2122  ax-10 2143  ax-11 2159  ax-12 2176  ax-ext 2773  ax-rep 5157  ax-sep 5170  ax-nul 5177  ax-pow 5234  ax-pr 5298  ax-un 7445 This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3or 1085  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2601  df-eu 2632  df-clab 2780  df-cleq 2794  df-clel 2873  df-nfc 2941  df-ne 2991  df-ral 3114  df-rex 3115  df-reu 3116  df-rab 3118  df-v 3446  df-sbc 3724  df-csb 3832  df-dif 3887  df-un 3889  df-in 3891  df-ss 3901  df-pss 3903  df-nul 4247  df-if 4429  df-pw 4502  df-sn 4529  df-pr 4531  df-tp 4533  df-op 4535  df-uni 4804  df-int 4842  df-iun 4886  df-iin 4887  df-br 5034  df-opab 5096  df-mpt 5114  df-tr 5140  df-id 5428  df-eprel 5433  df-po 5442  df-so 5443  df-fr 5482  df-we 5484  df-xp 5529  df-rel 5530  df-cnv 5531  df-co 5532  df-dm 5533  df-rn 5534  df-res 5535  df-ima 5536  df-pred 6120  df-ord 6166  df-on 6167  df-lim 6168  df-suc 6169  df-iota 6287  df-fun 6330  df-fn 6331  df-f 6332  df-f1 6333  df-fo 6334  df-f1o 6335  df-fv 6336  df-ov 7142  df-oprab 7143  df-mpo 7144  df-om 7565  df-1st 7675  df-2nd 7676  df-wrecs 7934  df-recs 7995  df-rdg 8033  df-1o 8089  df-oadd 8093  df-er 8276  df-map 8395  df-en 8497  df-dom 8498  df-fin 8500  df-fi 8863  df-rest 16691  df-topgen 16712  df-top 21502  df-topon 21519  df-bases 21554  df-cld 21627  df-ntr 21628  df-cls 21629  df-nei 21706  df-cn 21835  df-cnp 21836  df-haus 21923  df-cmp 21995  df-nlly 22075  df-kgen 22142  df-tx 22170 This theorem is referenced by: (None)
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