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Theorem ptpjopn 21637
 Description: The projection map is an open map. (Contributed by Mario Carneiro, 2-Sep-2015.)
Hypotheses
Ref Expression
ptpjcn.1 𝑌 = 𝐽
ptpjcn.2 𝐽 = (∏t𝐹)
Assertion
Ref Expression
ptpjopn (((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) → ((𝑥𝑌 ↦ (𝑥𝐼)) “ 𝑈) ∈ (𝐹𝐼))
Distinct variable groups:   𝑥,𝐴   𝑥,𝐹   𝑥,𝐼   𝑥,𝑉   𝑥,𝑌   𝑥,𝑈
Allowed substitution hint:   𝐽(𝑥)

Proof of Theorem ptpjopn
Dummy variables 𝑔 𝑘 𝑛 𝑠 𝑤 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 df-ima 5279 . . 3 ((𝑥𝑌 ↦ (𝑥𝐼)) “ 𝑈) = ran ((𝑥𝑌 ↦ (𝑥𝐼)) ↾ 𝑈)
2 elssuni 4619 . . . . . . 7 (𝑈𝐽𝑈 𝐽)
3 ptpjcn.1 . . . . . . 7 𝑌 = 𝐽
42, 3syl6sseqr 3793 . . . . . 6 (𝑈𝐽𝑈𝑌)
54adantl 473 . . . . 5 (((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) → 𝑈𝑌)
65resmptd 5610 . . . 4 (((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) → ((𝑥𝑌 ↦ (𝑥𝐼)) ↾ 𝑈) = (𝑥𝑈 ↦ (𝑥𝐼)))
76rneqd 5508 . . 3 (((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) → ran ((𝑥𝑌 ↦ (𝑥𝐼)) ↾ 𝑈) = ran (𝑥𝑈 ↦ (𝑥𝐼)))
81, 7syl5eq 2806 . 2 (((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) → ((𝑥𝑌 ↦ (𝑥𝐼)) “ 𝑈) = ran (𝑥𝑈 ↦ (𝑥𝐼)))
9 ptpjcn.2 . . . . . . . . . . 11 𝐽 = (∏t𝐹)
10 ffn 6206 . . . . . . . . . . . 12 (𝐹:𝐴⟶Top → 𝐹 Fn 𝐴)
11 eqid 2760 . . . . . . . . . . . . 13 {𝑠 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦)) ∧ 𝑠 = X𝑦𝐴 (𝑔𝑦))} = {𝑠 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦)) ∧ 𝑠 = X𝑦𝐴 (𝑔𝑦))}
1211ptval 21595 . . . . . . . . . . . 12 ((𝐴𝑉𝐹 Fn 𝐴) → (∏t𝐹) = (topGen‘{𝑠 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦)) ∧ 𝑠 = X𝑦𝐴 (𝑔𝑦))}))
1310, 12sylan2 492 . . . . . . . . . . 11 ((𝐴𝑉𝐹:𝐴⟶Top) → (∏t𝐹) = (topGen‘{𝑠 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦)) ∧ 𝑠 = X𝑦𝐴 (𝑔𝑦))}))
149, 13syl5eq 2806 . . . . . . . . . 10 ((𝐴𝑉𝐹:𝐴⟶Top) → 𝐽 = (topGen‘{𝑠 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦)) ∧ 𝑠 = X𝑦𝐴 (𝑔𝑦))}))
15143adant3 1127 . . . . . . . . 9 ((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) → 𝐽 = (topGen‘{𝑠 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦)) ∧ 𝑠 = X𝑦𝐴 (𝑔𝑦))}))
1615eleq2d 2825 . . . . . . . 8 ((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) → (𝑈𝐽𝑈 ∈ (topGen‘{𝑠 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦)) ∧ 𝑠 = X𝑦𝐴 (𝑔𝑦))})))
1716biimpa 502 . . . . . . 7 (((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) → 𝑈 ∈ (topGen‘{𝑠 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦)) ∧ 𝑠 = X𝑦𝐴 (𝑔𝑦))}))
18 tg2 20991 . . . . . . 7 ((𝑈 ∈ (topGen‘{𝑠 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦)) ∧ 𝑠 = X𝑦𝐴 (𝑔𝑦))}) ∧ 𝑠𝑈) → ∃𝑤 ∈ {𝑠 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦)) ∧ 𝑠 = X𝑦𝐴 (𝑔𝑦))} (𝑠𝑤𝑤𝑈))
1917, 18sylan 489 . . . . . 6 ((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) → ∃𝑤 ∈ {𝑠 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦)) ∧ 𝑠 = X𝑦𝐴 (𝑔𝑦))} (𝑠𝑤𝑤𝑈))
20 vex 3343 . . . . . . . . 9 𝑤 ∈ V
21 eqeq1 2764 . . . . . . . . . . 11 (𝑠 = 𝑤 → (𝑠 = X𝑦𝐴 (𝑔𝑦) ↔ 𝑤 = X𝑦𝐴 (𝑔𝑦)))
2221anbi2d 742 . . . . . . . . . 10 (𝑠 = 𝑤 → (((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦)) ∧ 𝑠 = X𝑦𝐴 (𝑔𝑦)) ↔ ((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦)) ∧ 𝑤 = X𝑦𝐴 (𝑔𝑦))))
2322exbidv 1999 . . . . . . . . 9 (𝑠 = 𝑤 → (∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦)) ∧ 𝑠 = X𝑦𝐴 (𝑔𝑦)) ↔ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦)) ∧ 𝑤 = X𝑦𝐴 (𝑔𝑦))))
2420, 23elab 3490 . . . . . . . 8 (𝑤 ∈ {𝑠 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦)) ∧ 𝑠 = X𝑦𝐴 (𝑔𝑦))} ↔ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦)) ∧ 𝑤 = X𝑦𝐴 (𝑔𝑦)))
25 fveq2 6353 . . . . . . . . . . . . . . 15 (𝑦 = 𝐼 → (𝑔𝑦) = (𝑔𝐼))
26 fveq2 6353 . . . . . . . . . . . . . . 15 (𝑦 = 𝐼 → (𝐹𝑦) = (𝐹𝐼))
2725, 26eleq12d 2833 . . . . . . . . . . . . . 14 (𝑦 = 𝐼 → ((𝑔𝑦) ∈ (𝐹𝑦) ↔ (𝑔𝐼) ∈ (𝐹𝐼)))
28 simplr2 1263 . . . . . . . . . . . . . 14 ((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) → ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦))
29 simpl3 1232 . . . . . . . . . . . . . . 15 (((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) → 𝐼𝐴)
3029ad3antrrr 768 . . . . . . . . . . . . . 14 ((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) → 𝐼𝐴)
3127, 28, 30rspcdva 3455 . . . . . . . . . . . . 13 ((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) → (𝑔𝐼) ∈ (𝐹𝐼))
32 fveq2 6353 . . . . . . . . . . . . . . 15 (𝑦 = 𝐼 → (𝑠𝑦) = (𝑠𝐼))
3332, 25eleq12d 2833 . . . . . . . . . . . . . 14 (𝑦 = 𝐼 → ((𝑠𝑦) ∈ (𝑔𝑦) ↔ (𝑠𝐼) ∈ (𝑔𝐼)))
34 vex 3343 . . . . . . . . . . . . . . . . 17 𝑠 ∈ V
3534elixp 8083 . . . . . . . . . . . . . . . 16 (𝑠X𝑦𝐴 (𝑔𝑦) ↔ (𝑠 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑠𝑦) ∈ (𝑔𝑦)))
3635simprbi 483 . . . . . . . . . . . . . . 15 (𝑠X𝑦𝐴 (𝑔𝑦) → ∀𝑦𝐴 (𝑠𝑦) ∈ (𝑔𝑦))
3736ad2antrl 766 . . . . . . . . . . . . . 14 ((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) → ∀𝑦𝐴 (𝑠𝑦) ∈ (𝑔𝑦))
3833, 37, 30rspcdva 3455 . . . . . . . . . . . . 13 ((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) → (𝑠𝐼) ∈ (𝑔𝐼))
39 simplrr 820 . . . . . . . . . . . . . . . . . 18 (((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) ∧ 𝑘 ∈ (𝑔𝐼)) → X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)
40 simplrl 819 . . . . . . . . . . . . . . . . . . . . . . . 24 ((((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) ∧ (𝑘 ∈ (𝑔𝐼) ∧ 𝑛𝐴)) ∧ 𝑛 = 𝐼) → 𝑘 ∈ (𝑔𝐼))
41 fveq2 6353 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑛 = 𝐼 → (𝑔𝑛) = (𝑔𝐼))
4241adantl 473 . . . . . . . . . . . . . . . . . . . . . . . 24 ((((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) ∧ (𝑘 ∈ (𝑔𝐼) ∧ 𝑛𝐴)) ∧ 𝑛 = 𝐼) → (𝑔𝑛) = (𝑔𝐼))
4340, 42eleqtrrd 2842 . . . . . . . . . . . . . . . . . . . . . . 23 ((((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) ∧ (𝑘 ∈ (𝑔𝐼) ∧ 𝑛𝐴)) ∧ 𝑛 = 𝐼) → 𝑘 ∈ (𝑔𝑛))
44 fveq2 6353 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (𝑦 = 𝑛 → (𝑠𝑦) = (𝑠𝑛))
45 fveq2 6353 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (𝑦 = 𝑛 → (𝑔𝑦) = (𝑔𝑛))
4644, 45eleq12d 2833 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑦 = 𝑛 → ((𝑠𝑦) ∈ (𝑔𝑦) ↔ (𝑠𝑛) ∈ (𝑔𝑛)))
47 simplrl 819 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) ∧ (𝑘 ∈ (𝑔𝐼) ∧ 𝑛𝐴)) → 𝑠X𝑦𝐴 (𝑔𝑦))
4847, 36syl 17 . . . . . . . . . . . . . . . . . . . . . . . . 25 (((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) ∧ (𝑘 ∈ (𝑔𝐼) ∧ 𝑛𝐴)) → ∀𝑦𝐴 (𝑠𝑦) ∈ (𝑔𝑦))
49 simprr 813 . . . . . . . . . . . . . . . . . . . . . . . . 25 (((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) ∧ (𝑘 ∈ (𝑔𝐼) ∧ 𝑛𝐴)) → 𝑛𝐴)
5046, 48, 49rspcdva 3455 . . . . . . . . . . . . . . . . . . . . . . . 24 (((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) ∧ (𝑘 ∈ (𝑔𝐼) ∧ 𝑛𝐴)) → (𝑠𝑛) ∈ (𝑔𝑛))
5150adantr 472 . . . . . . . . . . . . . . . . . . . . . . 23 ((((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) ∧ (𝑘 ∈ (𝑔𝐼) ∧ 𝑛𝐴)) ∧ ¬ 𝑛 = 𝐼) → (𝑠𝑛) ∈ (𝑔𝑛))
5243, 51ifclda 4264 . . . . . . . . . . . . . . . . . . . . . 22 (((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) ∧ (𝑘 ∈ (𝑔𝐼) ∧ 𝑛𝐴)) → if(𝑛 = 𝐼, 𝑘, (𝑠𝑛)) ∈ (𝑔𝑛))
5352anassrs 683 . . . . . . . . . . . . . . . . . . . . 21 ((((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) ∧ 𝑘 ∈ (𝑔𝐼)) ∧ 𝑛𝐴) → if(𝑛 = 𝐼, 𝑘, (𝑠𝑛)) ∈ (𝑔𝑛))
5453ralrimiva 3104 . . . . . . . . . . . . . . . . . . . 20 (((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) ∧ 𝑘 ∈ (𝑔𝐼)) → ∀𝑛𝐴 if(𝑛 = 𝐼, 𝑘, (𝑠𝑛)) ∈ (𝑔𝑛))
55 simpll1 1255 . . . . . . . . . . . . . . . . . . . . . 22 ((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) → 𝐴𝑉)
5655ad3antrrr 768 . . . . . . . . . . . . . . . . . . . . 21 (((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) ∧ 𝑘 ∈ (𝑔𝐼)) → 𝐴𝑉)
57 mptelixpg 8113 . . . . . . . . . . . . . . . . . . . . 21 (𝐴𝑉 → ((𝑛𝐴 ↦ if(𝑛 = 𝐼, 𝑘, (𝑠𝑛))) ∈ X𝑛𝐴 (𝑔𝑛) ↔ ∀𝑛𝐴 if(𝑛 = 𝐼, 𝑘, (𝑠𝑛)) ∈ (𝑔𝑛)))
5856, 57syl 17 . . . . . . . . . . . . . . . . . . . 20 (((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) ∧ 𝑘 ∈ (𝑔𝐼)) → ((𝑛𝐴 ↦ if(𝑛 = 𝐼, 𝑘, (𝑠𝑛))) ∈ X𝑛𝐴 (𝑔𝑛) ↔ ∀𝑛𝐴 if(𝑛 = 𝐼, 𝑘, (𝑠𝑛)) ∈ (𝑔𝑛)))
5954, 58mpbird 247 . . . . . . . . . . . . . . . . . . 19 (((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) ∧ 𝑘 ∈ (𝑔𝐼)) → (𝑛𝐴 ↦ if(𝑛 = 𝐼, 𝑘, (𝑠𝑛))) ∈ X𝑛𝐴 (𝑔𝑛))
60 fveq2 6353 . . . . . . . . . . . . . . . . . . . 20 (𝑛 = 𝑦 → (𝑔𝑛) = (𝑔𝑦))
6160cbvixpv 8094 . . . . . . . . . . . . . . . . . . 19 X𝑛𝐴 (𝑔𝑛) = X𝑦𝐴 (𝑔𝑦)
6259, 61syl6eleq 2849 . . . . . . . . . . . . . . . . . 18 (((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) ∧ 𝑘 ∈ (𝑔𝐼)) → (𝑛𝐴 ↦ if(𝑛 = 𝐼, 𝑘, (𝑠𝑛))) ∈ X𝑦𝐴 (𝑔𝑦))
6339, 62sseldd 3745 . . . . . . . . . . . . . . . . 17 (((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) ∧ 𝑘 ∈ (𝑔𝐼)) → (𝑛𝐴 ↦ if(𝑛 = 𝐼, 𝑘, (𝑠𝑛))) ∈ 𝑈)
6430adantr 472 . . . . . . . . . . . . . . . . . . 19 (((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) ∧ 𝑘 ∈ (𝑔𝐼)) → 𝐼𝐴)
65 iftrue 4236 . . . . . . . . . . . . . . . . . . . 20 (𝑛 = 𝐼 → if(𝑛 = 𝐼, 𝑘, (𝑠𝑛)) = 𝑘)
66 eqid 2760 . . . . . . . . . . . . . . . . . . . 20 (𝑛𝐴 ↦ if(𝑛 = 𝐼, 𝑘, (𝑠𝑛))) = (𝑛𝐴 ↦ if(𝑛 = 𝐼, 𝑘, (𝑠𝑛)))
67 vex 3343 . . . . . . . . . . . . . . . . . . . 20 𝑘 ∈ V
6865, 66, 67fvmpt 6445 . . . . . . . . . . . . . . . . . . 19 (𝐼𝐴 → ((𝑛𝐴 ↦ if(𝑛 = 𝐼, 𝑘, (𝑠𝑛)))‘𝐼) = 𝑘)
6964, 68syl 17 . . . . . . . . . . . . . . . . . 18 (((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) ∧ 𝑘 ∈ (𝑔𝐼)) → ((𝑛𝐴 ↦ if(𝑛 = 𝐼, 𝑘, (𝑠𝑛)))‘𝐼) = 𝑘)
7069eqcomd 2766 . . . . . . . . . . . . . . . . 17 (((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) ∧ 𝑘 ∈ (𝑔𝐼)) → 𝑘 = ((𝑛𝐴 ↦ if(𝑛 = 𝐼, 𝑘, (𝑠𝑛)))‘𝐼))
71 fveq1 6352 . . . . . . . . . . . . . . . . . . 19 (𝑥 = (𝑛𝐴 ↦ if(𝑛 = 𝐼, 𝑘, (𝑠𝑛))) → (𝑥𝐼) = ((𝑛𝐴 ↦ if(𝑛 = 𝐼, 𝑘, (𝑠𝑛)))‘𝐼))
7271eqeq2d 2770 . . . . . . . . . . . . . . . . . 18 (𝑥 = (𝑛𝐴 ↦ if(𝑛 = 𝐼, 𝑘, (𝑠𝑛))) → (𝑘 = (𝑥𝐼) ↔ 𝑘 = ((𝑛𝐴 ↦ if(𝑛 = 𝐼, 𝑘, (𝑠𝑛)))‘𝐼)))
7372rspcev 3449 . . . . . . . . . . . . . . . . 17 (((𝑛𝐴 ↦ if(𝑛 = 𝐼, 𝑘, (𝑠𝑛))) ∈ 𝑈𝑘 = ((𝑛𝐴 ↦ if(𝑛 = 𝐼, 𝑘, (𝑠𝑛)))‘𝐼)) → ∃𝑥𝑈 𝑘 = (𝑥𝐼))
7463, 70, 73syl2anc 696 . . . . . . . . . . . . . . . 16 (((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) ∧ 𝑘 ∈ (𝑔𝐼)) → ∃𝑥𝑈 𝑘 = (𝑥𝐼))
75 eqid 2760 . . . . . . . . . . . . . . . . . 18 (𝑥𝑈 ↦ (𝑥𝐼)) = (𝑥𝑈 ↦ (𝑥𝐼))
7675elrnmpt 5527 . . . . . . . . . . . . . . . . 17 (𝑘 ∈ V → (𝑘 ∈ ran (𝑥𝑈 ↦ (𝑥𝐼)) ↔ ∃𝑥𝑈 𝑘 = (𝑥𝐼)))
7767, 76ax-mp 5 . . . . . . . . . . . . . . . 16 (𝑘 ∈ ran (𝑥𝑈 ↦ (𝑥𝐼)) ↔ ∃𝑥𝑈 𝑘 = (𝑥𝐼))
7874, 77sylibr 224 . . . . . . . . . . . . . . 15 (((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) ∧ 𝑘 ∈ (𝑔𝐼)) → 𝑘 ∈ ran (𝑥𝑈 ↦ (𝑥𝐼)))
7978ex 449 . . . . . . . . . . . . . 14 ((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) → (𝑘 ∈ (𝑔𝐼) → 𝑘 ∈ ran (𝑥𝑈 ↦ (𝑥𝐼))))
8079ssrdv 3750 . . . . . . . . . . . . 13 ((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) → (𝑔𝐼) ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼)))
81 eleq2 2828 . . . . . . . . . . . . . . 15 (𝑧 = (𝑔𝐼) → ((𝑠𝐼) ∈ 𝑧 ↔ (𝑠𝐼) ∈ (𝑔𝐼)))
82 sseq1 3767 . . . . . . . . . . . . . . 15 (𝑧 = (𝑔𝐼) → (𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼)) ↔ (𝑔𝐼) ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼))))
8381, 82anbi12d 749 . . . . . . . . . . . . . 14 (𝑧 = (𝑔𝐼) → (((𝑠𝐼) ∈ 𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼))) ↔ ((𝑠𝐼) ∈ (𝑔𝐼) ∧ (𝑔𝐼) ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼)))))
8483rspcev 3449 . . . . . . . . . . . . 13 (((𝑔𝐼) ∈ (𝐹𝐼) ∧ ((𝑠𝐼) ∈ (𝑔𝐼) ∧ (𝑔𝐼) ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼)))) → ∃𝑧 ∈ (𝐹𝐼)((𝑠𝐼) ∈ 𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼))))
8531, 38, 80, 84syl12anc 1475 . . . . . . . . . . . 12 ((((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) ∧ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)) → ∃𝑧 ∈ (𝐹𝐼)((𝑠𝐼) ∈ 𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼))))
8685ex 449 . . . . . . . . . . 11 (((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) → ((𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈) → ∃𝑧 ∈ (𝐹𝐼)((𝑠𝐼) ∈ 𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼)))))
87 eleq2 2828 . . . . . . . . . . . . 13 (𝑤 = X𝑦𝐴 (𝑔𝑦) → (𝑠𝑤𝑠X𝑦𝐴 (𝑔𝑦)))
88 sseq1 3767 . . . . . . . . . . . . 13 (𝑤 = X𝑦𝐴 (𝑔𝑦) → (𝑤𝑈X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈))
8987, 88anbi12d 749 . . . . . . . . . . . 12 (𝑤 = X𝑦𝐴 (𝑔𝑦) → ((𝑠𝑤𝑤𝑈) ↔ (𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈)))
9089imbi1d 330 . . . . . . . . . . 11 (𝑤 = X𝑦𝐴 (𝑔𝑦) → (((𝑠𝑤𝑤𝑈) → ∃𝑧 ∈ (𝐹𝐼)((𝑠𝐼) ∈ 𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼)))) ↔ ((𝑠X𝑦𝐴 (𝑔𝑦) ∧ X𝑦𝐴 (𝑔𝑦) ⊆ 𝑈) → ∃𝑧 ∈ (𝐹𝐼)((𝑠𝐼) ∈ 𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼))))))
9186, 90syl5ibrcom 237 . . . . . . . . . 10 (((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦))) → (𝑤 = X𝑦𝐴 (𝑔𝑦) → ((𝑠𝑤𝑤𝑈) → ∃𝑧 ∈ (𝐹𝐼)((𝑠𝐼) ∈ 𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼))))))
9291expimpd 630 . . . . . . . . 9 ((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) → (((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦)) ∧ 𝑤 = X𝑦𝐴 (𝑔𝑦)) → ((𝑠𝑤𝑤𝑈) → ∃𝑧 ∈ (𝐹𝐼)((𝑠𝐼) ∈ 𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼))))))
9392exlimdv 2010 . . . . . . . 8 ((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) → (∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦)) ∧ 𝑤 = X𝑦𝐴 (𝑔𝑦)) → ((𝑠𝑤𝑤𝑈) → ∃𝑧 ∈ (𝐹𝐼)((𝑠𝐼) ∈ 𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼))))))
9424, 93syl5bi 232 . . . . . . 7 ((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) → (𝑤 ∈ {𝑠 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦)) ∧ 𝑠 = X𝑦𝐴 (𝑔𝑦))} → ((𝑠𝑤𝑤𝑈) → ∃𝑧 ∈ (𝐹𝐼)((𝑠𝐼) ∈ 𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼))))))
9594rexlimdv 3168 . . . . . 6 ((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) → (∃𝑤 ∈ {𝑠 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ (𝐹𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = (𝐹𝑦)) ∧ 𝑠 = X𝑦𝐴 (𝑔𝑦))} (𝑠𝑤𝑤𝑈) → ∃𝑧 ∈ (𝐹𝐼)((𝑠𝐼) ∈ 𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼)))))
9619, 95mpd 15 . . . . 5 ((((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) ∧ 𝑠𝑈) → ∃𝑧 ∈ (𝐹𝐼)((𝑠𝐼) ∈ 𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼))))
9796ralrimiva 3104 . . . 4 (((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) → ∀𝑠𝑈𝑧 ∈ (𝐹𝐼)((𝑠𝐼) ∈ 𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼))))
98 fvex 6363 . . . . . 6 (𝑠𝐼) ∈ V
9998rgenw 3062 . . . . 5 𝑠𝑈 (𝑠𝐼) ∈ V
100 fveq1 6352 . . . . . . 7 (𝑥 = 𝑠 → (𝑥𝐼) = (𝑠𝐼))
101100cbvmptv 4902 . . . . . 6 (𝑥𝑈 ↦ (𝑥𝐼)) = (𝑠𝑈 ↦ (𝑠𝐼))
102 eleq1 2827 . . . . . . . 8 (𝑦 = (𝑠𝐼) → (𝑦𝑧 ↔ (𝑠𝐼) ∈ 𝑧))
103102anbi1d 743 . . . . . . 7 (𝑦 = (𝑠𝐼) → ((𝑦𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼))) ↔ ((𝑠𝐼) ∈ 𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼)))))
104103rexbidv 3190 . . . . . 6 (𝑦 = (𝑠𝐼) → (∃𝑧 ∈ (𝐹𝐼)(𝑦𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼))) ↔ ∃𝑧 ∈ (𝐹𝐼)((𝑠𝐼) ∈ 𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼)))))
105101, 104ralrnmpt 6532 . . . . 5 (∀𝑠𝑈 (𝑠𝐼) ∈ V → (∀𝑦 ∈ ran (𝑥𝑈 ↦ (𝑥𝐼))∃𝑧 ∈ (𝐹𝐼)(𝑦𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼))) ↔ ∀𝑠𝑈𝑧 ∈ (𝐹𝐼)((𝑠𝐼) ∈ 𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼)))))
10699, 105ax-mp 5 . . . 4 (∀𝑦 ∈ ran (𝑥𝑈 ↦ (𝑥𝐼))∃𝑧 ∈ (𝐹𝐼)(𝑦𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼))) ↔ ∀𝑠𝑈𝑧 ∈ (𝐹𝐼)((𝑠𝐼) ∈ 𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼))))
10797, 106sylibr 224 . . 3 (((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) → ∀𝑦 ∈ ran (𝑥𝑈 ↦ (𝑥𝐼))∃𝑧 ∈ (𝐹𝐼)(𝑦𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼))))
108 simpl2 1230 . . . . 5 (((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) → 𝐹:𝐴⟶Top)
109108, 29ffvelrnd 6524 . . . 4 (((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) → (𝐹𝐼) ∈ Top)
110 eltop2 21001 . . . 4 ((𝐹𝐼) ∈ Top → (ran (𝑥𝑈 ↦ (𝑥𝐼)) ∈ (𝐹𝐼) ↔ ∀𝑦 ∈ ran (𝑥𝑈 ↦ (𝑥𝐼))∃𝑧 ∈ (𝐹𝐼)(𝑦𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼)))))
111109, 110syl 17 . . 3 (((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) → (ran (𝑥𝑈 ↦ (𝑥𝐼)) ∈ (𝐹𝐼) ↔ ∀𝑦 ∈ ran (𝑥𝑈 ↦ (𝑥𝐼))∃𝑧 ∈ (𝐹𝐼)(𝑦𝑧𝑧 ⊆ ran (𝑥𝑈 ↦ (𝑥𝐼)))))
112107, 111mpbird 247 . 2 (((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) → ran (𝑥𝑈 ↦ (𝑥𝐼)) ∈ (𝐹𝐼))
1138, 112eqeltrd 2839 1 (((𝐴𝑉𝐹:𝐴⟶Top ∧ 𝐼𝐴) ∧ 𝑈𝐽) → ((𝑥𝑌 ↦ (𝑥𝐼)) “ 𝑈) ∈ (𝐹𝐼))
 Colors of variables: wff setvar class Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 196   ∧ wa 383   ∧ w3a 1072   = wceq 1632  ∃wex 1853   ∈ wcel 2139  {cab 2746  ∀wral 3050  ∃wrex 3051  Vcvv 3340   ∖ cdif 3712   ⊆ wss 3715  ifcif 4230  ∪ cuni 4588   ↦ cmpt 4881  ran crn 5267   ↾ cres 5268   “ cima 5269   Fn wfn 6044  ⟶wf 6045  ‘cfv 6049  Xcixp 8076  Fincfn 8123  topGenctg 16320  ∏tcpt 16321  Topctop 20920 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1871  ax-4 1886  ax-5 1988  ax-6 2054  ax-7 2090  ax-8 2141  ax-9 2148  ax-10 2168  ax-11 2183  ax-12 2196  ax-13 2391  ax-ext 2740  ax-rep 4923  ax-sep 4933  ax-nul 4941  ax-pow 4992  ax-pr 5055  ax-un 7115 This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3an 1074  df-tru 1635  df-ex 1854  df-nf 1859  df-sb 2047  df-eu 2611  df-mo 2612  df-clab 2747  df-cleq 2753  df-clel 2756  df-nfc 2891  df-ne 2933  df-ral 3055  df-rex 3056  df-reu 3057  df-rab 3059  df-v 3342  df-sbc 3577  df-csb 3675  df-dif 3718  df-un 3720  df-in 3722  df-ss 3729  df-nul 4059  df-if 4231  df-pw 4304  df-sn 4322  df-pr 4324  df-op 4328  df-uni 4589  df-iun 4674  df-br 4805  df-opab 4865  df-mpt 4882  df-id 5174  df-xp 5272  df-rel 5273  df-cnv 5274  df-co 5275  df-dm 5276  df-rn 5277  df-res 5278  df-ima 5279  df-iota 6012  df-fun 6051  df-fn 6052  df-f 6053  df-f1 6054  df-fo 6055  df-f1o 6056  df-fv 6057  df-ixp 8077  df-topgen 16326  df-pt 16327  df-top 20921 This theorem is referenced by: (None)
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