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Theorem cmpsub 21983
Description: Two equivalent ways of describing a compact subset of a topological space. Inspired by Sue E. Goodman's Beginning Topology. (Contributed by Jeff Hankins, 22-Jun-2009.) (Revised by Mario Carneiro, 15-Dec-2013.)
Hypothesis
Ref Expression
cmpsub.1 𝑋 = 𝐽
Assertion
Ref Expression
cmpsub ((𝐽 ∈ Top ∧ 𝑆𝑋) → ((𝐽t 𝑆) ∈ Comp ↔ ∀𝑐 ∈ 𝒫 𝐽(𝑆 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑆 𝑑)))
Distinct variable groups:   𝑐,𝑑,𝐽   𝑆,𝑐,𝑑   𝑋,𝑐,𝑑

Proof of Theorem cmpsub
Dummy variables 𝑥 𝑦 𝑓 𝑠 𝑡 𝑢 𝑣 𝑤 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 eqid 2821 . . . 4 (𝐽t 𝑆) = (𝐽t 𝑆)
21iscmp 21971 . . 3 ((𝐽t 𝑆) ∈ Comp ↔ ((𝐽t 𝑆) ∈ Top ∧ ∀𝑠 ∈ 𝒫 (𝐽t 𝑆)( (𝐽t 𝑆) = 𝑠 → ∃𝑡 ∈ (𝒫 𝑠 ∩ Fin) (𝐽t 𝑆) = 𝑡)))
3 id 22 . . . . . 6 (𝑆𝑋𝑆𝑋)
4 cmpsub.1 . . . . . . 7 𝑋 = 𝐽
54topopn 21489 . . . . . 6 (𝐽 ∈ Top → 𝑋𝐽)
6 ssexg 5200 . . . . . 6 ((𝑆𝑋𝑋𝐽) → 𝑆 ∈ V)
73, 5, 6syl2anr 599 . . . . 5 ((𝐽 ∈ Top ∧ 𝑆𝑋) → 𝑆 ∈ V)
8 resttop 21743 . . . . 5 ((𝐽 ∈ Top ∧ 𝑆 ∈ V) → (𝐽t 𝑆) ∈ Top)
97, 8syldan 594 . . . 4 ((𝐽 ∈ Top ∧ 𝑆𝑋) → (𝐽t 𝑆) ∈ Top)
10 ibar 532 . . . . 5 ((𝐽t 𝑆) ∈ Top → (∀𝑠 ∈ 𝒫 (𝐽t 𝑆)( (𝐽t 𝑆) = 𝑠 → ∃𝑡 ∈ (𝒫 𝑠 ∩ Fin) (𝐽t 𝑆) = 𝑡) ↔ ((𝐽t 𝑆) ∈ Top ∧ ∀𝑠 ∈ 𝒫 (𝐽t 𝑆)( (𝐽t 𝑆) = 𝑠 → ∃𝑡 ∈ (𝒫 𝑠 ∩ Fin) (𝐽t 𝑆) = 𝑡))))
1110bicomd 226 . . . 4 ((𝐽t 𝑆) ∈ Top → (((𝐽t 𝑆) ∈ Top ∧ ∀𝑠 ∈ 𝒫 (𝐽t 𝑆)( (𝐽t 𝑆) = 𝑠 → ∃𝑡 ∈ (𝒫 𝑠 ∩ Fin) (𝐽t 𝑆) = 𝑡)) ↔ ∀𝑠 ∈ 𝒫 (𝐽t 𝑆)( (𝐽t 𝑆) = 𝑠 → ∃𝑡 ∈ (𝒫 𝑠 ∩ Fin) (𝐽t 𝑆) = 𝑡)))
129, 11syl 17 . . 3 ((𝐽 ∈ Top ∧ 𝑆𝑋) → (((𝐽t 𝑆) ∈ Top ∧ ∀𝑠 ∈ 𝒫 (𝐽t 𝑆)( (𝐽t 𝑆) = 𝑠 → ∃𝑡 ∈ (𝒫 𝑠 ∩ Fin) (𝐽t 𝑆) = 𝑡)) ↔ ∀𝑠 ∈ 𝒫 (𝐽t 𝑆)( (𝐽t 𝑆) = 𝑠 → ∃𝑡 ∈ (𝒫 𝑠 ∩ Fin) (𝐽t 𝑆) = 𝑡)))
132, 12syl5bb 286 . 2 ((𝐽 ∈ Top ∧ 𝑆𝑋) → ((𝐽t 𝑆) ∈ Comp ↔ ∀𝑠 ∈ 𝒫 (𝐽t 𝑆)( (𝐽t 𝑆) = 𝑠 → ∃𝑡 ∈ (𝒫 𝑠 ∩ Fin) (𝐽t 𝑆) = 𝑡)))
14 vex 3474 . . . . . . . . . . 11 𝑡 ∈ V
15 eqeq1 2825 . . . . . . . . . . . 12 (𝑥 = 𝑡 → (𝑥 = (𝑦𝑆) ↔ 𝑡 = (𝑦𝑆)))
1615rexbidv 3283 . . . . . . . . . . 11 (𝑥 = 𝑡 → (∃𝑦𝑐 𝑥 = (𝑦𝑆) ↔ ∃𝑦𝑐 𝑡 = (𝑦𝑆)))
1714, 16elab 3644 . . . . . . . . . 10 (𝑡 ∈ {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ↔ ∃𝑦𝑐 𝑡 = (𝑦𝑆))
18 velpw 4517 . . . . . . . . . . . . . 14 (𝑐 ∈ 𝒫 𝐽𝑐𝐽)
19 ssel2 3938 . . . . . . . . . . . . . . . 16 ((𝑐𝐽𝑦𝑐) → 𝑦𝐽)
20 ineq1 4156 . . . . . . . . . . . . . . . . . 18 (𝑑 = 𝑦 → (𝑑𝑆) = (𝑦𝑆))
2120rspceeqv 3615 . . . . . . . . . . . . . . . . 17 ((𝑦𝐽𝑡 = (𝑦𝑆)) → ∃𝑑𝐽 𝑡 = (𝑑𝑆))
2221ex 416 . . . . . . . . . . . . . . . 16 (𝑦𝐽 → (𝑡 = (𝑦𝑆) → ∃𝑑𝐽 𝑡 = (𝑑𝑆)))
2319, 22syl 17 . . . . . . . . . . . . . . 15 ((𝑐𝐽𝑦𝑐) → (𝑡 = (𝑦𝑆) → ∃𝑑𝐽 𝑡 = (𝑑𝑆)))
2423ex 416 . . . . . . . . . . . . . 14 (𝑐𝐽 → (𝑦𝑐 → (𝑡 = (𝑦𝑆) → ∃𝑑𝐽 𝑡 = (𝑑𝑆))))
2518, 24sylbi 220 . . . . . . . . . . . . 13 (𝑐 ∈ 𝒫 𝐽 → (𝑦𝑐 → (𝑡 = (𝑦𝑆) → ∃𝑑𝐽 𝑡 = (𝑑𝑆))))
2625adantl 485 . . . . . . . . . . . 12 (((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) → (𝑦𝑐 → (𝑡 = (𝑦𝑆) → ∃𝑑𝐽 𝑡 = (𝑑𝑆))))
2726rexlimdv 3269 . . . . . . . . . . 11 (((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) → (∃𝑦𝑐 𝑡 = (𝑦𝑆) → ∃𝑑𝐽 𝑡 = (𝑑𝑆)))
28 simpll 766 . . . . . . . . . . . 12 (((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) → 𝐽 ∈ Top)
294sseq2i 3972 . . . . . . . . . . . . . 14 (𝑆𝑋𝑆 𝐽)
30 uniexg 7441 . . . . . . . . . . . . . . . 16 (𝐽 ∈ Top → 𝐽 ∈ V)
31 ssexg 5200 . . . . . . . . . . . . . . . 16 ((𝑆 𝐽 𝐽 ∈ V) → 𝑆 ∈ V)
3230, 31sylan2 595 . . . . . . . . . . . . . . 15 ((𝑆 𝐽𝐽 ∈ Top) → 𝑆 ∈ V)
3332ancoms 462 . . . . . . . . . . . . . 14 ((𝐽 ∈ Top ∧ 𝑆 𝐽) → 𝑆 ∈ V)
3429, 33sylan2b 596 . . . . . . . . . . . . 13 ((𝐽 ∈ Top ∧ 𝑆𝑋) → 𝑆 ∈ V)
3534adantr 484 . . . . . . . . . . . 12 (((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) → 𝑆 ∈ V)
36 elrest 16679 . . . . . . . . . . . 12 ((𝐽 ∈ Top ∧ 𝑆 ∈ V) → (𝑡 ∈ (𝐽t 𝑆) ↔ ∃𝑑𝐽 𝑡 = (𝑑𝑆)))
3728, 35, 36syl2anc 587 . . . . . . . . . . 11 (((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) → (𝑡 ∈ (𝐽t 𝑆) ↔ ∃𝑑𝐽 𝑡 = (𝑑𝑆)))
3827, 37sylibrd 262 . . . . . . . . . 10 (((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) → (∃𝑦𝑐 𝑡 = (𝑦𝑆) → 𝑡 ∈ (𝐽t 𝑆)))
3917, 38syl5bi 245 . . . . . . . . 9 (((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) → (𝑡 ∈ {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} → 𝑡 ∈ (𝐽t 𝑆)))
4039ssrdv 3949 . . . . . . . 8 (((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) → {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ⊆ (𝐽t 𝑆))
41 vex 3474 . . . . . . . . . 10 𝑐 ∈ V
4241abrexex 7638 . . . . . . . . 9 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∈ V
4342elpw 4516 . . . . . . . 8 ({𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∈ 𝒫 (𝐽t 𝑆) ↔ {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ⊆ (𝐽t 𝑆))
4440, 43sylibr 237 . . . . . . 7 (((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) → {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∈ 𝒫 (𝐽t 𝑆))
45 unieq 4822 . . . . . . . . . 10 (𝑠 = {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} → 𝑠 = {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)})
4645eqeq2d 2832 . . . . . . . . 9 (𝑠 = {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} → ( (𝐽t 𝑆) = 𝑠 (𝐽t 𝑆) = {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)}))
47 pweq 4528 . . . . . . . . . . 11 (𝑠 = {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} → 𝒫 𝑠 = 𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)})
4847ineq1d 4163 . . . . . . . . . 10 (𝑠 = {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} → (𝒫 𝑠 ∩ Fin) = (𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∩ Fin))
4948rexeqdv 3397 . . . . . . . . 9 (𝑠 = {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} → (∃𝑡 ∈ (𝒫 𝑠 ∩ Fin) (𝐽t 𝑆) = 𝑡 ↔ ∃𝑡 ∈ (𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∩ Fin) (𝐽t 𝑆) = 𝑡))
5046, 49imbi12d 348 . . . . . . . 8 (𝑠 = {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} → (( (𝐽t 𝑆) = 𝑠 → ∃𝑡 ∈ (𝒫 𝑠 ∩ Fin) (𝐽t 𝑆) = 𝑡) ↔ ( (𝐽t 𝑆) = {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} → ∃𝑡 ∈ (𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∩ Fin) (𝐽t 𝑆) = 𝑡)))
5150rspcva 3598 . . . . . . 7 (({𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∈ 𝒫 (𝐽t 𝑆) ∧ ∀𝑠 ∈ 𝒫 (𝐽t 𝑆)( (𝐽t 𝑆) = 𝑠 → ∃𝑡 ∈ (𝒫 𝑠 ∩ Fin) (𝐽t 𝑆) = 𝑡)) → ( (𝐽t 𝑆) = {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} → ∃𝑡 ∈ (𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∩ Fin) (𝐽t 𝑆) = 𝑡))
5244, 51sylan 583 . . . . . 6 ((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ ∀𝑠 ∈ 𝒫 (𝐽t 𝑆)( (𝐽t 𝑆) = 𝑠 → ∃𝑡 ∈ (𝒫 𝑠 ∩ Fin) (𝐽t 𝑆) = 𝑡)) → ( (𝐽t 𝑆) = {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} → ∃𝑡 ∈ (𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∩ Fin) (𝐽t 𝑆) = 𝑡))
5352ex 416 . . . . 5 (((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) → (∀𝑠 ∈ 𝒫 (𝐽t 𝑆)( (𝐽t 𝑆) = 𝑠 → ∃𝑡 ∈ (𝒫 𝑠 ∩ Fin) (𝐽t 𝑆) = 𝑡) → ( (𝐽t 𝑆) = {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} → ∃𝑡 ∈ (𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∩ Fin) (𝐽t 𝑆) = 𝑡)))
544restuni 21745 . . . . . . . . . . 11 ((𝐽 ∈ Top ∧ 𝑆𝑋) → 𝑆 = (𝐽t 𝑆))
5554ad2antrr 725 . . . . . . . . . 10 ((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) → 𝑆 = (𝐽t 𝑆))
56 vex 3474 . . . . . . . . . . . . . 14 𝑦 ∈ V
5756inex1 5194 . . . . . . . . . . . . 13 (𝑦𝑆) ∈ V
5857dfiun2 4931 . . . . . . . . . . . 12 𝑦𝑐 (𝑦𝑆) = {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)}
59 incom 4153 . . . . . . . . . . . . . 14 (𝑦𝑆) = (𝑆𝑦)
6059a1i 11 . . . . . . . . . . . . 13 (((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) ∧ 𝑦𝑐) → (𝑦𝑆) = (𝑆𝑦))
6160iuneq2dv 4916 . . . . . . . . . . . 12 ((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) → 𝑦𝑐 (𝑦𝑆) = 𝑦𝑐 (𝑆𝑦))
6258, 61syl5eqr 2870 . . . . . . . . . . 11 ((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) → {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} = 𝑦𝑐 (𝑆𝑦))
63 iunin2 4966 . . . . . . . . . . . 12 𝑦𝑐 (𝑆𝑦) = (𝑆 𝑦𝑐 𝑦)
64 uniiun 4955 . . . . . . . . . . . . . . . 16 𝑐 = 𝑦𝑐 𝑦
6564eqcomi 2830 . . . . . . . . . . . . . . 15 𝑦𝑐 𝑦 = 𝑐
6665a1i 11 . . . . . . . . . . . . . 14 ((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) → 𝑦𝑐 𝑦 = 𝑐)
6766ineq2d 4164 . . . . . . . . . . . . 13 ((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) → (𝑆 𝑦𝑐 𝑦) = (𝑆 𝑐))
68 incom 4153 . . . . . . . . . . . . . . 15 (𝑆 𝑐) = ( 𝑐𝑆)
69 sseqin2 4167 . . . . . . . . . . . . . . . 16 (𝑆 𝑐 ↔ ( 𝑐𝑆) = 𝑆)
7069biimpi 219 . . . . . . . . . . . . . . 15 (𝑆 𝑐 → ( 𝑐𝑆) = 𝑆)
7168, 70syl5eq 2868 . . . . . . . . . . . . . 14 (𝑆 𝑐 → (𝑆 𝑐) = 𝑆)
7271adantl 485 . . . . . . . . . . . . 13 ((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) → (𝑆 𝑐) = 𝑆)
7367, 72eqtrd 2856 . . . . . . . . . . . 12 ((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) → (𝑆 𝑦𝑐 𝑦) = 𝑆)
7463, 73syl5eq 2868 . . . . . . . . . . 11 ((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) → 𝑦𝑐 (𝑆𝑦) = 𝑆)
7562, 74eqtr2d 2857 . . . . . . . . . 10 ((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) → 𝑆 = {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)})
7655, 75eqeq12d 2837 . . . . . . . . 9 ((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) → (𝑆 = 𝑆 (𝐽t 𝑆) = {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)}))
7755eqeq1d 2823 . . . . . . . . . 10 ((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) → (𝑆 = 𝑡 (𝐽t 𝑆) = 𝑡))
7877rexbidv 3283 . . . . . . . . 9 ((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) → (∃𝑡 ∈ (𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∩ Fin)𝑆 = 𝑡 ↔ ∃𝑡 ∈ (𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∩ Fin) (𝐽t 𝑆) = 𝑡))
7976, 78imbi12d 348 . . . . . . . 8 ((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) → ((𝑆 = 𝑆 → ∃𝑡 ∈ (𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∩ Fin)𝑆 = 𝑡) ↔ ( (𝐽t 𝑆) = {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} → ∃𝑡 ∈ (𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∩ Fin) (𝐽t 𝑆) = 𝑡)))
80 eqid 2821 . . . . . . . . . 10 𝑆 = 𝑆
8180a1bi 366 . . . . . . . . 9 (∃𝑡 ∈ (𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∩ Fin)𝑆 = 𝑡 ↔ (𝑆 = 𝑆 → ∃𝑡 ∈ (𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∩ Fin)𝑆 = 𝑡))
82 elin 3926 . . . . . . . . . . . 12 (𝑡 ∈ (𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∩ Fin) ↔ (𝑡 ∈ 𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∧ 𝑡 ∈ Fin))
83 velpw 4517 . . . . . . . . . . . . . 14 (𝑡 ∈ 𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ↔ 𝑡 ⊆ {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)})
84 dfss3 3932 . . . . . . . . . . . . . 14 (𝑡 ⊆ {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ↔ ∀𝑠𝑡 𝑠 ∈ {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)})
85 vex 3474 . . . . . . . . . . . . . . . 16 𝑠 ∈ V
86 eqeq1 2825 . . . . . . . . . . . . . . . . 17 (𝑥 = 𝑠 → (𝑥 = (𝑦𝑆) ↔ 𝑠 = (𝑦𝑆)))
8786rexbidv 3283 . . . . . . . . . . . . . . . 16 (𝑥 = 𝑠 → (∃𝑦𝑐 𝑥 = (𝑦𝑆) ↔ ∃𝑦𝑐 𝑠 = (𝑦𝑆)))
8885, 87elab 3644 . . . . . . . . . . . . . . 15 (𝑠 ∈ {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ↔ ∃𝑦𝑐 𝑠 = (𝑦𝑆))
8988ralbii 3153 . . . . . . . . . . . . . 14 (∀𝑠𝑡 𝑠 ∈ {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ↔ ∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆))
9083, 84, 893bitri 300 . . . . . . . . . . . . 13 (𝑡 ∈ 𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ↔ ∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆))
9190anbi1i 626 . . . . . . . . . . . 12 ((𝑡 ∈ 𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∧ 𝑡 ∈ Fin) ↔ (∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆) ∧ 𝑡 ∈ Fin))
9282, 91bitri 278 . . . . . . . . . . 11 (𝑡 ∈ (𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∩ Fin) ↔ (∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆) ∧ 𝑡 ∈ Fin))
93 ineq1 4156 . . . . . . . . . . . . . . . 16 (𝑦 = (𝑓𝑠) → (𝑦𝑆) = ((𝑓𝑠) ∩ 𝑆))
9493eqeq2d 2832 . . . . . . . . . . . . . . 15 (𝑦 = (𝑓𝑠) → (𝑠 = (𝑦𝑆) ↔ 𝑠 = ((𝑓𝑠) ∩ 𝑆)))
9594ac6sfi 8738 . . . . . . . . . . . . . 14 ((𝑡 ∈ Fin ∧ ∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆)) → ∃𝑓(𝑓:𝑡𝑐 ∧ ∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆)))
9695ancoms 462 . . . . . . . . . . . . 13 ((∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆) ∧ 𝑡 ∈ Fin) → ∃𝑓(𝑓:𝑡𝑐 ∧ ∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆)))
9796adantl 485 . . . . . . . . . . . 12 (((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) ∧ (∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆) ∧ 𝑡 ∈ Fin)) → ∃𝑓(𝑓:𝑡𝑐 ∧ ∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆)))
98 frn 6493 . . . . . . . . . . . . . . . . . . . . 21 (𝑓:𝑡𝑐 → ran 𝑓𝑐)
9998ad2antrl 727 . . . . . . . . . . . . . . . . . . . 20 (((((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) ∧ (∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆) ∧ 𝑡 ∈ Fin)) ∧ 𝑆 = 𝑡) ∧ (𝑓:𝑡𝑐 ∧ ∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆))) → ran 𝑓𝑐)
100 vex 3474 . . . . . . . . . . . . . . . . . . . . . 22 𝑓 ∈ V
101100rnex 7592 . . . . . . . . . . . . . . . . . . . . 21 ran 𝑓 ∈ V
102101elpw 4516 . . . . . . . . . . . . . . . . . . . 20 (ran 𝑓 ∈ 𝒫 𝑐 ↔ ran 𝑓𝑐)
10399, 102sylibr 237 . . . . . . . . . . . . . . . . . . 19 (((((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) ∧ (∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆) ∧ 𝑡 ∈ Fin)) ∧ 𝑆 = 𝑡) ∧ (𝑓:𝑡𝑐 ∧ ∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆))) → ran 𝑓 ∈ 𝒫 𝑐)
104 simprr 772 . . . . . . . . . . . . . . . . . . . . 21 (((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) ∧ (∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆) ∧ 𝑡 ∈ Fin)) → 𝑡 ∈ Fin)
105104ad2antrr 725 . . . . . . . . . . . . . . . . . . . 20 (((((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) ∧ (∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆) ∧ 𝑡 ∈ Fin)) ∧ 𝑆 = 𝑡) ∧ (𝑓:𝑡𝑐 ∧ ∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆))) → 𝑡 ∈ Fin)
106 ffn 6487 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑓:𝑡𝑐𝑓 Fn 𝑡)
107 dffn4 6569 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑓 Fn 𝑡𝑓:𝑡onto→ran 𝑓)
108106, 107sylib 221 . . . . . . . . . . . . . . . . . . . . . . . 24 (𝑓:𝑡𝑐𝑓:𝑡onto→ran 𝑓)
109 fodomfi 8773 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝑡 ∈ Fin ∧ 𝑓:𝑡onto→ran 𝑓) → ran 𝑓𝑡)
110108, 109sylan2 595 . . . . . . . . . . . . . . . . . . . . . . 23 ((𝑡 ∈ Fin ∧ 𝑓:𝑡𝑐) → ran 𝑓𝑡)
111110adantll 713 . . . . . . . . . . . . . . . . . . . . . 22 (((∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆) ∧ 𝑡 ∈ Fin) ∧ 𝑓:𝑡𝑐) → ran 𝑓𝑡)
112111adantll 713 . . . . . . . . . . . . . . . . . . . . 21 ((((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) ∧ (∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆) ∧ 𝑡 ∈ Fin)) ∧ 𝑓:𝑡𝑐) → ran 𝑓𝑡)
113112ad2ant2r 746 . . . . . . . . . . . . . . . . . . . 20 (((((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) ∧ (∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆) ∧ 𝑡 ∈ Fin)) ∧ 𝑆 = 𝑡) ∧ (𝑓:𝑡𝑐 ∧ ∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆))) → ran 𝑓𝑡)
114 domfi 8715 . . . . . . . . . . . . . . . . . . . 20 ((𝑡 ∈ Fin ∧ ran 𝑓𝑡) → ran 𝑓 ∈ Fin)
115105, 113, 114syl2anc 587 . . . . . . . . . . . . . . . . . . 19 (((((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) ∧ (∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆) ∧ 𝑡 ∈ Fin)) ∧ 𝑆 = 𝑡) ∧ (𝑓:𝑡𝑐 ∧ ∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆))) → ran 𝑓 ∈ Fin)
116103, 115elind 4146 . . . . . . . . . . . . . . . . . 18 (((((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) ∧ (∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆) ∧ 𝑡 ∈ Fin)) ∧ 𝑆 = 𝑡) ∧ (𝑓:𝑡𝑐 ∧ ∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆))) → ran 𝑓 ∈ (𝒫 𝑐 ∩ Fin))
117 id 22 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (𝑠 = 𝑢𝑠 = 𝑢)
118 fveq2 6643 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (𝑠 = 𝑢 → (𝑓𝑠) = (𝑓𝑢))
119118ineq1d 4163 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (𝑠 = 𝑢 → ((𝑓𝑠) ∩ 𝑆) = ((𝑓𝑢) ∩ 𝑆))
120117, 119eqeq12d 2837 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (𝑠 = 𝑢 → (𝑠 = ((𝑓𝑠) ∩ 𝑆) ↔ 𝑢 = ((𝑓𝑢) ∩ 𝑆)))
121120rspccv 3597 . . . . . . . . . . . . . . . . . . . . . . . . 25 (∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆) → (𝑢𝑡𝑢 = ((𝑓𝑢) ∩ 𝑆)))
122 pm2.27 42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 (𝑢𝑡 → ((𝑢𝑡𝑢 = ((𝑓𝑢) ∩ 𝑆)) → 𝑢 = ((𝑓𝑢) ∩ 𝑆)))
123 inss1 4180 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 ((𝑓𝑢) ∩ 𝑆) ⊆ (𝑓𝑢)
124 sseq1 3968 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 (𝑢 = ((𝑓𝑢) ∩ 𝑆) → (𝑢 ⊆ (𝑓𝑢) ↔ ((𝑓𝑢) ∩ 𝑆) ⊆ (𝑓𝑢)))
125123, 124mpbiri 261 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 (𝑢 = ((𝑓𝑢) ∩ 𝑆) → 𝑢 ⊆ (𝑓𝑢))
126 ssel 3937 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 (𝑢 ⊆ (𝑓𝑢) → (𝑤𝑢𝑤 ∈ (𝑓𝑢)))
127126a1dd 50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 (𝑢 ⊆ (𝑓𝑢) → (𝑤𝑢 → (𝑓:𝑡𝑐𝑤 ∈ (𝑓𝑢))))
128125, 127syl 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 (𝑢 = ((𝑓𝑢) ∩ 𝑆) → (𝑤𝑢 → (𝑓:𝑡𝑐𝑤 ∈ (𝑓𝑢))))
129128a1i 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 (𝑢𝑡 → (𝑢 = ((𝑓𝑢) ∩ 𝑆) → (𝑤𝑢 → (𝑓:𝑡𝑐𝑤 ∈ (𝑓𝑢)))))
1301293imp 1108 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 ((𝑢𝑡𝑢 = ((𝑓𝑢) ∩ 𝑆) ∧ 𝑤𝑢) → (𝑓:𝑡𝑐𝑤 ∈ (𝑓𝑢)))
131 fnfvelrn 6821 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 ((𝑓 Fn 𝑡𝑢𝑡) → (𝑓𝑢) ∈ ran 𝑓)
132131expcom 417 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 (𝑢𝑡 → (𝑓 Fn 𝑡 → (𝑓𝑢) ∈ ran 𝑓))
1331323ad2ant1 1130 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 ((𝑢𝑡𝑢 = ((𝑓𝑢) ∩ 𝑆) ∧ 𝑤𝑢) → (𝑓 Fn 𝑡 → (𝑓𝑢) ∈ ran 𝑓))
134106, 133syl5 34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 ((𝑢𝑡𝑢 = ((𝑓𝑢) ∩ 𝑆) ∧ 𝑤𝑢) → (𝑓:𝑡𝑐 → (𝑓𝑢) ∈ ran 𝑓))
135130, 134jcad 516 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ((𝑢𝑡𝑢 = ((𝑓𝑢) ∩ 𝑆) ∧ 𝑤𝑢) → (𝑓:𝑡𝑐 → (𝑤 ∈ (𝑓𝑢) ∧ (𝑓𝑢) ∈ ran 𝑓)))
1361353exp 1116 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 (𝑢𝑡 → (𝑢 = ((𝑓𝑢) ∩ 𝑆) → (𝑤𝑢 → (𝑓:𝑡𝑐 → (𝑤 ∈ (𝑓𝑢) ∧ (𝑓𝑢) ∈ ran 𝑓)))))
137122, 136syld 47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 (𝑢𝑡 → ((𝑢𝑡𝑢 = ((𝑓𝑢) ∩ 𝑆)) → (𝑤𝑢 → (𝑓:𝑡𝑐 → (𝑤 ∈ (𝑓𝑢) ∧ (𝑓𝑢) ∈ ran 𝑓)))))
138137com3r 87 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (𝑤𝑢 → (𝑢𝑡 → ((𝑢𝑡𝑢 = ((𝑓𝑢) ∩ 𝑆)) → (𝑓:𝑡𝑐 → (𝑤 ∈ (𝑓𝑢) ∧ (𝑓𝑢) ∈ ran 𝑓)))))
139138imp 410 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ((𝑤𝑢𝑢𝑡) → ((𝑢𝑡𝑢 = ((𝑓𝑢) ∩ 𝑆)) → (𝑓:𝑡𝑐 → (𝑤 ∈ (𝑓𝑢) ∧ (𝑓𝑢) ∈ ran 𝑓))))
140139com3l 89 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((𝑢𝑡𝑢 = ((𝑓𝑢) ∩ 𝑆)) → (𝑓:𝑡𝑐 → ((𝑤𝑢𝑢𝑡) → (𝑤 ∈ (𝑓𝑢) ∧ (𝑓𝑢) ∈ ran 𝑓))))
141140impcom 411 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((𝑓:𝑡𝑐 ∧ (𝑢𝑡𝑢 = ((𝑓𝑢) ∩ 𝑆))) → ((𝑤𝑢𝑢𝑡) → (𝑤 ∈ (𝑓𝑢) ∧ (𝑓𝑢) ∈ ran 𝑓)))
142121, 141sylan2 595 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝑓:𝑡𝑐 ∧ ∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆)) → ((𝑤𝑢𝑢𝑡) → (𝑤 ∈ (𝑓𝑢) ∧ (𝑓𝑢) ∈ ran 𝑓)))
143 fvex 6656 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑓𝑢) ∈ V
144 eleq2 2900 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (𝑣 = (𝑓𝑢) → (𝑤𝑣𝑤 ∈ (𝑓𝑢)))
145 eleq1 2899 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (𝑣 = (𝑓𝑢) → (𝑣 ∈ ran 𝑓 ↔ (𝑓𝑢) ∈ ran 𝑓))
146144, 145anbi12d 633 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑣 = (𝑓𝑢) → ((𝑤𝑣𝑣 ∈ ran 𝑓) ↔ (𝑤 ∈ (𝑓𝑢) ∧ (𝑓𝑢) ∈ ran 𝑓)))
147143, 146spcev 3584 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝑤 ∈ (𝑓𝑢) ∧ (𝑓𝑢) ∈ ran 𝑓) → ∃𝑣(𝑤𝑣𝑣 ∈ ran 𝑓))
148142, 147syl6 35 . . . . . . . . . . . . . . . . . . . . . . 23 ((𝑓:𝑡𝑐 ∧ ∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆)) → ((𝑤𝑢𝑢𝑡) → ∃𝑣(𝑤𝑣𝑣 ∈ ran 𝑓)))
149148exlimdv 1935 . . . . . . . . . . . . . . . . . . . . . 22 ((𝑓:𝑡𝑐 ∧ ∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆)) → (∃𝑢(𝑤𝑢𝑢𝑡) → ∃𝑣(𝑤𝑣𝑣 ∈ ran 𝑓)))
150 eluni 4814 . . . . . . . . . . . . . . . . . . . . . 22 (𝑤 𝑡 ↔ ∃𝑢(𝑤𝑢𝑢𝑡))
151 eluni 4814 . . . . . . . . . . . . . . . . . . . . . 22 (𝑤 ran 𝑓 ↔ ∃𝑣(𝑤𝑣𝑣 ∈ ran 𝑓))
152149, 150, 1513imtr4g 299 . . . . . . . . . . . . . . . . . . . . 21 ((𝑓:𝑡𝑐 ∧ ∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆)) → (𝑤 𝑡𝑤 ran 𝑓))
153152ssrdv 3949 . . . . . . . . . . . . . . . . . . . 20 ((𝑓:𝑡𝑐 ∧ ∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆)) → 𝑡 ran 𝑓)
154153adantl 485 . . . . . . . . . . . . . . . . . . 19 (((((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) ∧ (∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆) ∧ 𝑡 ∈ Fin)) ∧ 𝑆 = 𝑡) ∧ (𝑓:𝑡𝑐 ∧ ∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆))) → 𝑡 ran 𝑓)
155 sseq1 3968 . . . . . . . . . . . . . . . . . . . 20 (𝑆 = 𝑡 → (𝑆 ran 𝑓 𝑡 ran 𝑓))
156155ad2antlr 726 . . . . . . . . . . . . . . . . . . 19 (((((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) ∧ (∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆) ∧ 𝑡 ∈ Fin)) ∧ 𝑆 = 𝑡) ∧ (𝑓:𝑡𝑐 ∧ ∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆))) → (𝑆 ran 𝑓 𝑡 ran 𝑓))
157154, 156mpbird 260 . . . . . . . . . . . . . . . . . 18 (((((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) ∧ (∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆) ∧ 𝑡 ∈ Fin)) ∧ 𝑆 = 𝑡) ∧ (𝑓:𝑡𝑐 ∧ ∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆))) → 𝑆 ran 𝑓)
158116, 157jca 515 . . . . . . . . . . . . . . . . 17 (((((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) ∧ (∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆) ∧ 𝑡 ∈ Fin)) ∧ 𝑆 = 𝑡) ∧ (𝑓:𝑡𝑐 ∧ ∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆))) → (ran 𝑓 ∈ (𝒫 𝑐 ∩ Fin) ∧ 𝑆 ran 𝑓))
159158ex 416 . . . . . . . . . . . . . . . 16 ((((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) ∧ (∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆) ∧ 𝑡 ∈ Fin)) ∧ 𝑆 = 𝑡) → ((𝑓:𝑡𝑐 ∧ ∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆)) → (ran 𝑓 ∈ (𝒫 𝑐 ∩ Fin) ∧ 𝑆 ran 𝑓)))
160159eximdv 1919 . . . . . . . . . . . . . . 15 ((((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) ∧ (∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆) ∧ 𝑡 ∈ Fin)) ∧ 𝑆 = 𝑡) → (∃𝑓(𝑓:𝑡𝑐 ∧ ∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆)) → ∃𝑓(ran 𝑓 ∈ (𝒫 𝑐 ∩ Fin) ∧ 𝑆 ran 𝑓)))
161160ex 416 . . . . . . . . . . . . . 14 (((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) ∧ (∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆) ∧ 𝑡 ∈ Fin)) → (𝑆 = 𝑡 → (∃𝑓(𝑓:𝑡𝑐 ∧ ∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆)) → ∃𝑓(ran 𝑓 ∈ (𝒫 𝑐 ∩ Fin) ∧ 𝑆 ran 𝑓))))
162161com23 86 . . . . . . . . . . . . 13 (((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) ∧ (∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆) ∧ 𝑡 ∈ Fin)) → (∃𝑓(𝑓:𝑡𝑐 ∧ ∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆)) → (𝑆 = 𝑡 → ∃𝑓(ran 𝑓 ∈ (𝒫 𝑐 ∩ Fin) ∧ 𝑆 ran 𝑓))))
163 unieq 4822 . . . . . . . . . . . . . . . 16 (𝑑 = ran 𝑓 𝑑 = ran 𝑓)
164163sseq2d 3975 . . . . . . . . . . . . . . 15 (𝑑 = ran 𝑓 → (𝑆 𝑑𝑆 ran 𝑓))
165164rspcev 3600 . . . . . . . . . . . . . 14 ((ran 𝑓 ∈ (𝒫 𝑐 ∩ Fin) ∧ 𝑆 ran 𝑓) → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑆 𝑑)
166165exlimiv 1932 . . . . . . . . . . . . 13 (∃𝑓(ran 𝑓 ∈ (𝒫 𝑐 ∩ Fin) ∧ 𝑆 ran 𝑓) → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑆 𝑑)
167162, 166syl8 76 . . . . . . . . . . . 12 (((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) ∧ (∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆) ∧ 𝑡 ∈ Fin)) → (∃𝑓(𝑓:𝑡𝑐 ∧ ∀𝑠𝑡 𝑠 = ((𝑓𝑠) ∩ 𝑆)) → (𝑆 = 𝑡 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑆 𝑑)))
16897, 167mpd 15 . . . . . . . . . . 11 (((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) ∧ (∀𝑠𝑡𝑦𝑐 𝑠 = (𝑦𝑆) ∧ 𝑡 ∈ Fin)) → (𝑆 = 𝑡 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑆 𝑑))
16992, 168sylan2b 596 . . . . . . . . . 10 (((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) ∧ 𝑡 ∈ (𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∩ Fin)) → (𝑆 = 𝑡 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑆 𝑑))
170169rexlimdva 3270 . . . . . . . . 9 ((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) → (∃𝑡 ∈ (𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∩ Fin)𝑆 = 𝑡 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑆 𝑑))
17181, 170syl5bir 246 . . . . . . . 8 ((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) → ((𝑆 = 𝑆 → ∃𝑡 ∈ (𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∩ Fin)𝑆 = 𝑡) → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑆 𝑑))
17279, 171sylbird 263 . . . . . . 7 ((((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) ∧ 𝑆 𝑐) → (( (𝐽t 𝑆) = {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} → ∃𝑡 ∈ (𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∩ Fin) (𝐽t 𝑆) = 𝑡) → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑆 𝑑))
173172ex 416 . . . . . 6 (((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) → (𝑆 𝑐 → (( (𝐽t 𝑆) = {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} → ∃𝑡 ∈ (𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∩ Fin) (𝐽t 𝑆) = 𝑡) → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑆 𝑑)))
174173com23 86 . . . . 5 (((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) → (( (𝐽t 𝑆) = {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} → ∃𝑡 ∈ (𝒫 {𝑥 ∣ ∃𝑦𝑐 𝑥 = (𝑦𝑆)} ∩ Fin) (𝐽t 𝑆) = 𝑡) → (𝑆 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑆 𝑑)))
17553, 174syld 47 . . . 4 (((𝐽 ∈ Top ∧ 𝑆𝑋) ∧ 𝑐 ∈ 𝒫 𝐽) → (∀𝑠 ∈ 𝒫 (𝐽t 𝑆)( (𝐽t 𝑆) = 𝑠 → ∃𝑡 ∈ (𝒫 𝑠 ∩ Fin) (𝐽t 𝑆) = 𝑡) → (𝑆 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑆 𝑑)))
176175ralrimdva 3177 . . 3 ((𝐽 ∈ Top ∧ 𝑆𝑋) → (∀𝑠 ∈ 𝒫 (𝐽t 𝑆)( (𝐽t 𝑆) = 𝑠 → ∃𝑡 ∈ (𝒫 𝑠 ∩ Fin) (𝐽t 𝑆) = 𝑡) → ∀𝑐 ∈ 𝒫 𝐽(𝑆 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑆 𝑑)))
1774cmpsublem 21982 . . 3 ((𝐽 ∈ Top ∧ 𝑆𝑋) → (∀𝑐 ∈ 𝒫 𝐽(𝑆 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑆 𝑑) → ∀𝑠 ∈ 𝒫 (𝐽t 𝑆)( (𝐽t 𝑆) = 𝑠 → ∃𝑡 ∈ (𝒫 𝑠 ∩ Fin) (𝐽t 𝑆) = 𝑡)))
178176, 177impbid 215 . 2 ((𝐽 ∈ Top ∧ 𝑆𝑋) → (∀𝑠 ∈ 𝒫 (𝐽t 𝑆)( (𝐽t 𝑆) = 𝑠 → ∃𝑡 ∈ (𝒫 𝑠 ∩ Fin) (𝐽t 𝑆) = 𝑡) ↔ ∀𝑐 ∈ 𝒫 𝐽(𝑆 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑆 𝑑)))
17913, 178bitrd 282 1 ((𝐽 ∈ Top ∧ 𝑆𝑋) → ((𝐽t 𝑆) ∈ Comp ↔ ∀𝑐 ∈ 𝒫 𝐽(𝑆 𝑐 → ∃𝑑 ∈ (𝒫 𝑐 ∩ Fin)𝑆 𝑑)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 209  wa 399  w3a 1084   = wceq 1538  wex 1781  wcel 2115  {cab 2799  wral 3126  wrex 3127  Vcvv 3471  cin 3909  wss 3910  𝒫 cpw 4512   cuni 4811   ciun 4892   class class class wbr 5039  ran crn 5529   Fn wfn 6323  wf 6324  ontowfo 6326  cfv 6328  (class class class)co 7130  cdom 8482  Fincfn 8484  t crest 16672  Topctop 21476  Compccmp 21969
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 1912  ax-6 1971  ax-7 2016  ax-8 2117  ax-9 2125  ax-10 2146  ax-11 2162  ax-12 2178  ax-ext 2793  ax-rep 5163  ax-sep 5176  ax-nul 5183  ax-pow 5239  ax-pr 5303  ax-un 7436
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 2071  df-mo 2623  df-eu 2654  df-clab 2800  df-cleq 2814  df-clel 2892  df-nfc 2960  df-ne 3008  df-ral 3131  df-rex 3132  df-reu 3133  df-rab 3135  df-v 3473  df-sbc 3750  df-csb 3858  df-dif 3913  df-un 3915  df-in 3917  df-ss 3927  df-pss 3929  df-nul 4267  df-if 4441  df-pw 4514  df-sn 4541  df-pr 4543  df-tp 4545  df-op 4547  df-uni 4812  df-int 4850  df-iun 4894  df-br 5040  df-opab 5102  df-mpt 5120  df-tr 5146  df-id 5433  df-eprel 5438  df-po 5447  df-so 5448  df-fr 5487  df-we 5489  df-xp 5534  df-rel 5535  df-cnv 5536  df-co 5537  df-dm 5538  df-rn 5539  df-res 5540  df-ima 5541  df-pred 6121  df-ord 6167  df-on 6168  df-lim 6169  df-suc 6170  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 7133  df-oprab 7134  df-mpo 7135  df-om 7556  df-1st 7664  df-2nd 7665  df-wrecs 7922  df-recs 7983  df-rdg 8021  df-1o 8077  df-oadd 8081  df-er 8264  df-en 8485  df-dom 8486  df-fin 8488  df-fi 8851  df-rest 16674  df-topgen 16695  df-top 21477  df-topon 21494  df-bases 21529  df-cmp 21970
This theorem is referenced by:  cmpcld  21985  uncmp  21986  hauscmplem  21989  1stckgenlem  22136  icccmp  23408  bndth  23541  ovolicc2  24104  stoweidlem50  42485  stoweidlem57  42492
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