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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  –onto→wfo 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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