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Theorem ubthlem1 27854
 Description: Lemma for ubth 27857. The function 𝐴 exhibits a countable collection of sets that are closed, being the inverse image under 𝑡 of the closed ball of radius 𝑘, and by assumption they cover 𝑋. Thus, by the Baire Category theorem bcth2 23173, for some 𝑛 the set 𝐴‘𝑛 has an interior, meaning that there is a closed ball {𝑧 ∈ 𝑋 ∣ (𝑦𝐷𝑧) ≤ 𝑟} in the set. (Contributed by Mario Carneiro, 11-Jan-2014.) (New usage is discouraged.)
Hypotheses
Ref Expression
ubth.1 𝑋 = (BaseSet‘𝑈)
ubth.2 𝑁 = (normCV𝑊)
ubthlem.3 𝐷 = (IndMet‘𝑈)
ubthlem.4 𝐽 = (MetOpen‘𝐷)
ubthlem.5 𝑈 ∈ CBan
ubthlem.6 𝑊 ∈ NrmCVec
ubthlem.7 (𝜑𝑇 ⊆ (𝑈 BLnOp 𝑊))
ubthlem.8 (𝜑 → ∀𝑥𝑋𝑐 ∈ ℝ ∀𝑡𝑇 (𝑁‘(𝑡𝑥)) ≤ 𝑐)
ubthlem.9 𝐴 = (𝑘 ∈ ℕ ↦ {𝑧𝑋 ∣ ∀𝑡𝑇 (𝑁‘(𝑡𝑧)) ≤ 𝑘})
Assertion
Ref Expression
ubthlem1 (𝜑 → ∃𝑛 ∈ ℕ ∃𝑦𝑋𝑟 ∈ ℝ+ {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ 𝑟} ⊆ (𝐴𝑛))
Distinct variable groups:   𝑘,𝑐,𝑛,𝑟,𝑥,𝑦,𝑧,𝐴   𝑡,𝑐,𝐷,𝑘,𝑛,𝑟,𝑥,𝑧   𝑘,𝐽,𝑛   𝑦,𝑡,𝐽,𝑥   𝑁,𝑐,𝑘,𝑛,𝑟,𝑡,𝑥,𝑦,𝑧   𝜑,𝑐,𝑘,𝑛,𝑟,𝑡,𝑥,𝑦   𝑇,𝑐,𝑘,𝑛,𝑟,𝑡,𝑥,𝑦,𝑧   𝑈,𝑐,𝑛,𝑟,𝑡,𝑥,𝑦,𝑧   𝑊,𝑐,𝑛,𝑟,𝑡,𝑥,𝑦   𝑋,𝑐,𝑘,𝑛,𝑟,𝑡,𝑥,𝑦,𝑧
Allowed substitution hints:   𝜑(𝑧)   𝐴(𝑡)   𝐷(𝑦)   𝑈(𝑘)   𝐽(𝑧,𝑟,𝑐)   𝑊(𝑧,𝑘)

Proof of Theorem ubthlem1
StepHypRef Expression
1 rzal 4106 . . . . . . . . 9 (𝑇 = ∅ → ∀𝑡𝑇 (𝑁‘(𝑡𝑧)) ≤ 𝑘)
21ralrimivw 2996 . . . . . . . 8 (𝑇 = ∅ → ∀𝑧𝑋𝑡𝑇 (𝑁‘(𝑡𝑧)) ≤ 𝑘)
3 rabid2 3148 . . . . . . . 8 (𝑋 = {𝑧𝑋 ∣ ∀𝑡𝑇 (𝑁‘(𝑡𝑧)) ≤ 𝑘} ↔ ∀𝑧𝑋𝑡𝑇 (𝑁‘(𝑡𝑧)) ≤ 𝑘)
42, 3sylibr 224 . . . . . . 7 (𝑇 = ∅ → 𝑋 = {𝑧𝑋 ∣ ∀𝑡𝑇 (𝑁‘(𝑡𝑧)) ≤ 𝑘})
54eqcomd 2657 . . . . . 6 (𝑇 = ∅ → {𝑧𝑋 ∣ ∀𝑡𝑇 (𝑁‘(𝑡𝑧)) ≤ 𝑘} = 𝑋)
65eleq1d 2715 . . . . 5 (𝑇 = ∅ → ({𝑧𝑋 ∣ ∀𝑡𝑇 (𝑁‘(𝑡𝑧)) ≤ 𝑘} ∈ (Clsd‘𝐽) ↔ 𝑋 ∈ (Clsd‘𝐽)))
7 iinrab 4614 . . . . . . 7 (𝑇 ≠ ∅ → 𝑡𝑇 {𝑧𝑋 ∣ (𝑁‘(𝑡𝑧)) ≤ 𝑘} = {𝑧𝑋 ∣ ∀𝑡𝑇 (𝑁‘(𝑡𝑧)) ≤ 𝑘})
87adantl 481 . . . . . 6 (((𝜑𝑘 ∈ ℕ) ∧ 𝑇 ≠ ∅) → 𝑡𝑇 {𝑧𝑋 ∣ (𝑁‘(𝑡𝑧)) ≤ 𝑘} = {𝑧𝑋 ∣ ∀𝑡𝑇 (𝑁‘(𝑡𝑧)) ≤ 𝑘})
9 id 22 . . . . . . 7 (𝑇 ≠ ∅ → 𝑇 ≠ ∅)
10 ubthlem.7 . . . . . . . . . . . . . . . . . . 19 (𝜑𝑇 ⊆ (𝑈 BLnOp 𝑊))
1110sselda 3636 . . . . . . . . . . . . . . . . . 18 ((𝜑𝑡𝑇) → 𝑡 ∈ (𝑈 BLnOp 𝑊))
12 ubthlem.3 . . . . . . . . . . . . . . . . . . . 20 𝐷 = (IndMet‘𝑈)
13 eqid 2651 . . . . . . . . . . . . . . . . . . . 20 (IndMet‘𝑊) = (IndMet‘𝑊)
14 ubthlem.4 . . . . . . . . . . . . . . . . . . . 20 𝐽 = (MetOpen‘𝐷)
15 eqid 2651 . . . . . . . . . . . . . . . . . . . 20 (MetOpen‘(IndMet‘𝑊)) = (MetOpen‘(IndMet‘𝑊))
16 eqid 2651 . . . . . . . . . . . . . . . . . . . 20 (𝑈 BLnOp 𝑊) = (𝑈 BLnOp 𝑊)
17 ubthlem.5 . . . . . . . . . . . . . . . . . . . . 21 𝑈 ∈ CBan
18 bnnv 27850 . . . . . . . . . . . . . . . . . . . . 21 (𝑈 ∈ CBan → 𝑈 ∈ NrmCVec)
1917, 18ax-mp 5 . . . . . . . . . . . . . . . . . . . 20 𝑈 ∈ NrmCVec
20 ubthlem.6 . . . . . . . . . . . . . . . . . . . 20 𝑊 ∈ NrmCVec
2112, 13, 14, 15, 16, 19, 20blocn2 27791 . . . . . . . . . . . . . . . . . . 19 (𝑡 ∈ (𝑈 BLnOp 𝑊) → 𝑡 ∈ (𝐽 Cn (MetOpen‘(IndMet‘𝑊))))
22 ubth.1 . . . . . . . . . . . . . . . . . . . . . . . 24 𝑋 = (BaseSet‘𝑈)
2322, 12cbncms 27849 . . . . . . . . . . . . . . . . . . . . . . 23 (𝑈 ∈ CBan → 𝐷 ∈ (CMet‘𝑋))
2417, 23ax-mp 5 . . . . . . . . . . . . . . . . . . . . . 22 𝐷 ∈ (CMet‘𝑋)
25 cmetmet 23130 . . . . . . . . . . . . . . . . . . . . . 22 (𝐷 ∈ (CMet‘𝑋) → 𝐷 ∈ (Met‘𝑋))
26 metxmet 22186 . . . . . . . . . . . . . . . . . . . . . 22 (𝐷 ∈ (Met‘𝑋) → 𝐷 ∈ (∞Met‘𝑋))
2724, 25, 26mp2b 10 . . . . . . . . . . . . . . . . . . . . 21 𝐷 ∈ (∞Met‘𝑋)
2814mopntopon 22291 . . . . . . . . . . . . . . . . . . . . 21 (𝐷 ∈ (∞Met‘𝑋) → 𝐽 ∈ (TopOn‘𝑋))
2927, 28ax-mp 5 . . . . . . . . . . . . . . . . . . . 20 𝐽 ∈ (TopOn‘𝑋)
30 eqid 2651 . . . . . . . . . . . . . . . . . . . . . . 23 (BaseSet‘𝑊) = (BaseSet‘𝑊)
3130, 13imsxmet 27675 . . . . . . . . . . . . . . . . . . . . . 22 (𝑊 ∈ NrmCVec → (IndMet‘𝑊) ∈ (∞Met‘(BaseSet‘𝑊)))
3220, 31ax-mp 5 . . . . . . . . . . . . . . . . . . . . 21 (IndMet‘𝑊) ∈ (∞Met‘(BaseSet‘𝑊))
3315mopntopon 22291 . . . . . . . . . . . . . . . . . . . . 21 ((IndMet‘𝑊) ∈ (∞Met‘(BaseSet‘𝑊)) → (MetOpen‘(IndMet‘𝑊)) ∈ (TopOn‘(BaseSet‘𝑊)))
3432, 33ax-mp 5 . . . . . . . . . . . . . . . . . . . 20 (MetOpen‘(IndMet‘𝑊)) ∈ (TopOn‘(BaseSet‘𝑊))
35 iscncl 21121 . . . . . . . . . . . . . . . . . . . 20 ((𝐽 ∈ (TopOn‘𝑋) ∧ (MetOpen‘(IndMet‘𝑊)) ∈ (TopOn‘(BaseSet‘𝑊))) → (𝑡 ∈ (𝐽 Cn (MetOpen‘(IndMet‘𝑊))) ↔ (𝑡:𝑋⟶(BaseSet‘𝑊) ∧ ∀𝑥 ∈ (Clsd‘(MetOpen‘(IndMet‘𝑊)))(𝑡𝑥) ∈ (Clsd‘𝐽))))
3629, 34, 35mp2an 708 . . . . . . . . . . . . . . . . . . 19 (𝑡 ∈ (𝐽 Cn (MetOpen‘(IndMet‘𝑊))) ↔ (𝑡:𝑋⟶(BaseSet‘𝑊) ∧ ∀𝑥 ∈ (Clsd‘(MetOpen‘(IndMet‘𝑊)))(𝑡𝑥) ∈ (Clsd‘𝐽)))
3721, 36sylib 208 . . . . . . . . . . . . . . . . . 18 (𝑡 ∈ (𝑈 BLnOp 𝑊) → (𝑡:𝑋⟶(BaseSet‘𝑊) ∧ ∀𝑥 ∈ (Clsd‘(MetOpen‘(IndMet‘𝑊)))(𝑡𝑥) ∈ (Clsd‘𝐽)))
3811, 37syl 17 . . . . . . . . . . . . . . . . 17 ((𝜑𝑡𝑇) → (𝑡:𝑋⟶(BaseSet‘𝑊) ∧ ∀𝑥 ∈ (Clsd‘(MetOpen‘(IndMet‘𝑊)))(𝑡𝑥) ∈ (Clsd‘𝐽)))
3938simpld 474 . . . . . . . . . . . . . . . 16 ((𝜑𝑡𝑇) → 𝑡:𝑋⟶(BaseSet‘𝑊))
4039adantlr 751 . . . . . . . . . . . . . . 15 (((𝜑𝑘 ∈ ℕ) ∧ 𝑡𝑇) → 𝑡:𝑋⟶(BaseSet‘𝑊))
4140ffvelrnda 6399 . . . . . . . . . . . . . 14 ((((𝜑𝑘 ∈ ℕ) ∧ 𝑡𝑇) ∧ 𝑥𝑋) → (𝑡𝑥) ∈ (BaseSet‘𝑊))
4241biantrurd 528 . . . . . . . . . . . . 13 ((((𝜑𝑘 ∈ ℕ) ∧ 𝑡𝑇) ∧ 𝑥𝑋) → ((𝑁‘(𝑡𝑥)) ≤ 𝑘 ↔ ((𝑡𝑥) ∈ (BaseSet‘𝑊) ∧ (𝑁‘(𝑡𝑥)) ≤ 𝑘)))
43 fveq2 6229 . . . . . . . . . . . . . . 15 (𝑦 = (𝑡𝑥) → (𝑁𝑦) = (𝑁‘(𝑡𝑥)))
4443breq1d 4695 . . . . . . . . . . . . . 14 (𝑦 = (𝑡𝑥) → ((𝑁𝑦) ≤ 𝑘 ↔ (𝑁‘(𝑡𝑥)) ≤ 𝑘))
4544elrab 3396 . . . . . . . . . . . . 13 ((𝑡𝑥) ∈ {𝑦 ∈ (BaseSet‘𝑊) ∣ (𝑁𝑦) ≤ 𝑘} ↔ ((𝑡𝑥) ∈ (BaseSet‘𝑊) ∧ (𝑁‘(𝑡𝑥)) ≤ 𝑘))
4642, 45syl6bbr 278 . . . . . . . . . . . 12 ((((𝜑𝑘 ∈ ℕ) ∧ 𝑡𝑇) ∧ 𝑥𝑋) → ((𝑁‘(𝑡𝑥)) ≤ 𝑘 ↔ (𝑡𝑥) ∈ {𝑦 ∈ (BaseSet‘𝑊) ∣ (𝑁𝑦) ≤ 𝑘}))
4746pm5.32da 674 . . . . . . . . . . 11 (((𝜑𝑘 ∈ ℕ) ∧ 𝑡𝑇) → ((𝑥𝑋 ∧ (𝑁‘(𝑡𝑥)) ≤ 𝑘) ↔ (𝑥𝑋 ∧ (𝑡𝑥) ∈ {𝑦 ∈ (BaseSet‘𝑊) ∣ (𝑁𝑦) ≤ 𝑘})))
48 fveq2 6229 . . . . . . . . . . . . . . 15 (𝑧 = 𝑥 → (𝑡𝑧) = (𝑡𝑥))
4948fveq2d 6233 . . . . . . . . . . . . . 14 (𝑧 = 𝑥 → (𝑁‘(𝑡𝑧)) = (𝑁‘(𝑡𝑥)))
5049breq1d 4695 . . . . . . . . . . . . 13 (𝑧 = 𝑥 → ((𝑁‘(𝑡𝑧)) ≤ 𝑘 ↔ (𝑁‘(𝑡𝑥)) ≤ 𝑘))
5150elrab 3396 . . . . . . . . . . . 12 (𝑥 ∈ {𝑧𝑋 ∣ (𝑁‘(𝑡𝑧)) ≤ 𝑘} ↔ (𝑥𝑋 ∧ (𝑁‘(𝑡𝑥)) ≤ 𝑘))
5251a1i 11 . . . . . . . . . . 11 (((𝜑𝑘 ∈ ℕ) ∧ 𝑡𝑇) → (𝑥 ∈ {𝑧𝑋 ∣ (𝑁‘(𝑡𝑧)) ≤ 𝑘} ↔ (𝑥𝑋 ∧ (𝑁‘(𝑡𝑥)) ≤ 𝑘)))
53 ffn 6083 . . . . . . . . . . . 12 (𝑡:𝑋⟶(BaseSet‘𝑊) → 𝑡 Fn 𝑋)
54 elpreima 6377 . . . . . . . . . . . 12 (𝑡 Fn 𝑋 → (𝑥 ∈ (𝑡 “ {𝑦 ∈ (BaseSet‘𝑊) ∣ (𝑁𝑦) ≤ 𝑘}) ↔ (𝑥𝑋 ∧ (𝑡𝑥) ∈ {𝑦 ∈ (BaseSet‘𝑊) ∣ (𝑁𝑦) ≤ 𝑘})))
5540, 53, 543syl 18 . . . . . . . . . . 11 (((𝜑𝑘 ∈ ℕ) ∧ 𝑡𝑇) → (𝑥 ∈ (𝑡 “ {𝑦 ∈ (BaseSet‘𝑊) ∣ (𝑁𝑦) ≤ 𝑘}) ↔ (𝑥𝑋 ∧ (𝑡𝑥) ∈ {𝑦 ∈ (BaseSet‘𝑊) ∣ (𝑁𝑦) ≤ 𝑘})))
5647, 52, 553bitr4d 300 . . . . . . . . . 10 (((𝜑𝑘 ∈ ℕ) ∧ 𝑡𝑇) → (𝑥 ∈ {𝑧𝑋 ∣ (𝑁‘(𝑡𝑧)) ≤ 𝑘} ↔ 𝑥 ∈ (𝑡 “ {𝑦 ∈ (BaseSet‘𝑊) ∣ (𝑁𝑦) ≤ 𝑘})))
5756eqrdv 2649 . . . . . . . . 9 (((𝜑𝑘 ∈ ℕ) ∧ 𝑡𝑇) → {𝑧𝑋 ∣ (𝑁‘(𝑡𝑧)) ≤ 𝑘} = (𝑡 “ {𝑦 ∈ (BaseSet‘𝑊) ∣ (𝑁𝑦) ≤ 𝑘}))
58 nnre 11065 . . . . . . . . . . . . 13 (𝑘 ∈ ℕ → 𝑘 ∈ ℝ)
5958ad2antlr 763 . . . . . . . . . . . 12 (((𝜑𝑘 ∈ ℕ) ∧ 𝑡𝑇) → 𝑘 ∈ ℝ)
6059rexrd 10127 . . . . . . . . . . 11 (((𝜑𝑘 ∈ ℕ) ∧ 𝑡𝑇) → 𝑘 ∈ ℝ*)
61 eqid 2651 . . . . . . . . . . . . . 14 (0vec𝑊) = (0vec𝑊)
6230, 61nvzcl 27617 . . . . . . . . . . . . 13 (𝑊 ∈ NrmCVec → (0vec𝑊) ∈ (BaseSet‘𝑊))
6320, 62ax-mp 5 . . . . . . . . . . . 12 (0vec𝑊) ∈ (BaseSet‘𝑊)
64 ubth.2 . . . . . . . . . . . . . . . . . 18 𝑁 = (normCV𝑊)
6530, 61, 64, 13nvnd 27671 . . . . . . . . . . . . . . . . 17 ((𝑊 ∈ NrmCVec ∧ 𝑦 ∈ (BaseSet‘𝑊)) → (𝑁𝑦) = (𝑦(IndMet‘𝑊)(0vec𝑊)))
6620, 65mpan 706 . . . . . . . . . . . . . . . 16 (𝑦 ∈ (BaseSet‘𝑊) → (𝑁𝑦) = (𝑦(IndMet‘𝑊)(0vec𝑊)))
67 xmetsym 22199 . . . . . . . . . . . . . . . . 17 (((IndMet‘𝑊) ∈ (∞Met‘(BaseSet‘𝑊)) ∧ (0vec𝑊) ∈ (BaseSet‘𝑊) ∧ 𝑦 ∈ (BaseSet‘𝑊)) → ((0vec𝑊)(IndMet‘𝑊)𝑦) = (𝑦(IndMet‘𝑊)(0vec𝑊)))
6832, 63, 67mp3an12 1454 . . . . . . . . . . . . . . . 16 (𝑦 ∈ (BaseSet‘𝑊) → ((0vec𝑊)(IndMet‘𝑊)𝑦) = (𝑦(IndMet‘𝑊)(0vec𝑊)))
6966, 68eqtr4d 2688 . . . . . . . . . . . . . . 15 (𝑦 ∈ (BaseSet‘𝑊) → (𝑁𝑦) = ((0vec𝑊)(IndMet‘𝑊)𝑦))
7069breq1d 4695 . . . . . . . . . . . . . 14 (𝑦 ∈ (BaseSet‘𝑊) → ((𝑁𝑦) ≤ 𝑘 ↔ ((0vec𝑊)(IndMet‘𝑊)𝑦) ≤ 𝑘))
7170rabbiia 3215 . . . . . . . . . . . . 13 {𝑦 ∈ (BaseSet‘𝑊) ∣ (𝑁𝑦) ≤ 𝑘} = {𝑦 ∈ (BaseSet‘𝑊) ∣ ((0vec𝑊)(IndMet‘𝑊)𝑦) ≤ 𝑘}
7215, 71blcld 22357 . . . . . . . . . . . 12 (((IndMet‘𝑊) ∈ (∞Met‘(BaseSet‘𝑊)) ∧ (0vec𝑊) ∈ (BaseSet‘𝑊) ∧ 𝑘 ∈ ℝ*) → {𝑦 ∈ (BaseSet‘𝑊) ∣ (𝑁𝑦) ≤ 𝑘} ∈ (Clsd‘(MetOpen‘(IndMet‘𝑊))))
7332, 63, 72mp3an12 1454 . . . . . . . . . . 11 (𝑘 ∈ ℝ* → {𝑦 ∈ (BaseSet‘𝑊) ∣ (𝑁𝑦) ≤ 𝑘} ∈ (Clsd‘(MetOpen‘(IndMet‘𝑊))))
7460, 73syl 17 . . . . . . . . . 10 (((𝜑𝑘 ∈ ℕ) ∧ 𝑡𝑇) → {𝑦 ∈ (BaseSet‘𝑊) ∣ (𝑁𝑦) ≤ 𝑘} ∈ (Clsd‘(MetOpen‘(IndMet‘𝑊))))
7538simprd 478 . . . . . . . . . . 11 ((𝜑𝑡𝑇) → ∀𝑥 ∈ (Clsd‘(MetOpen‘(IndMet‘𝑊)))(𝑡𝑥) ∈ (Clsd‘𝐽))
7675adantlr 751 . . . . . . . . . 10 (((𝜑𝑘 ∈ ℕ) ∧ 𝑡𝑇) → ∀𝑥 ∈ (Clsd‘(MetOpen‘(IndMet‘𝑊)))(𝑡𝑥) ∈ (Clsd‘𝐽))
77 imaeq2 5497 . . . . . . . . . . . 12 (𝑥 = {𝑦 ∈ (BaseSet‘𝑊) ∣ (𝑁𝑦) ≤ 𝑘} → (𝑡𝑥) = (𝑡 “ {𝑦 ∈ (BaseSet‘𝑊) ∣ (𝑁𝑦) ≤ 𝑘}))
7877eleq1d 2715 . . . . . . . . . . 11 (𝑥 = {𝑦 ∈ (BaseSet‘𝑊) ∣ (𝑁𝑦) ≤ 𝑘} → ((𝑡𝑥) ∈ (Clsd‘𝐽) ↔ (𝑡 “ {𝑦 ∈ (BaseSet‘𝑊) ∣ (𝑁𝑦) ≤ 𝑘}) ∈ (Clsd‘𝐽)))
7978rspcv 3336 . . . . . . . . . 10 ({𝑦 ∈ (BaseSet‘𝑊) ∣ (𝑁𝑦) ≤ 𝑘} ∈ (Clsd‘(MetOpen‘(IndMet‘𝑊))) → (∀𝑥 ∈ (Clsd‘(MetOpen‘(IndMet‘𝑊)))(𝑡𝑥) ∈ (Clsd‘𝐽) → (𝑡 “ {𝑦 ∈ (BaseSet‘𝑊) ∣ (𝑁𝑦) ≤ 𝑘}) ∈ (Clsd‘𝐽)))
8074, 76, 79sylc 65 . . . . . . . . 9 (((𝜑𝑘 ∈ ℕ) ∧ 𝑡𝑇) → (𝑡 “ {𝑦 ∈ (BaseSet‘𝑊) ∣ (𝑁𝑦) ≤ 𝑘}) ∈ (Clsd‘𝐽))
8157, 80eqeltrd 2730 . . . . . . . 8 (((𝜑𝑘 ∈ ℕ) ∧ 𝑡𝑇) → {𝑧𝑋 ∣ (𝑁‘(𝑡𝑧)) ≤ 𝑘} ∈ (Clsd‘𝐽))
8281ralrimiva 2995 . . . . . . 7 ((𝜑𝑘 ∈ ℕ) → ∀𝑡𝑇 {𝑧𝑋 ∣ (𝑁‘(𝑡𝑧)) ≤ 𝑘} ∈ (Clsd‘𝐽))
83 iincld 20891 . . . . . . 7 ((𝑇 ≠ ∅ ∧ ∀𝑡𝑇 {𝑧𝑋 ∣ (𝑁‘(𝑡𝑧)) ≤ 𝑘} ∈ (Clsd‘𝐽)) → 𝑡𝑇 {𝑧𝑋 ∣ (𝑁‘(𝑡𝑧)) ≤ 𝑘} ∈ (Clsd‘𝐽))
849, 82, 83syl2anr 494 . . . . . 6 (((𝜑𝑘 ∈ ℕ) ∧ 𝑇 ≠ ∅) → 𝑡𝑇 {𝑧𝑋 ∣ (𝑁‘(𝑡𝑧)) ≤ 𝑘} ∈ (Clsd‘𝐽))
858, 84eqeltrrd 2731 . . . . 5 (((𝜑𝑘 ∈ ℕ) ∧ 𝑇 ≠ ∅) → {𝑧𝑋 ∣ ∀𝑡𝑇 (𝑁‘(𝑡𝑧)) ≤ 𝑘} ∈ (Clsd‘𝐽))
8614mopntop 22292 . . . . . . . 8 (𝐷 ∈ (∞Met‘𝑋) → 𝐽 ∈ Top)
8727, 86ax-mp 5 . . . . . . 7 𝐽 ∈ Top
8829toponunii 20769 . . . . . . . 8 𝑋 = 𝐽
8988topcld 20887 . . . . . . 7 (𝐽 ∈ Top → 𝑋 ∈ (Clsd‘𝐽))
9087, 89ax-mp 5 . . . . . 6 𝑋 ∈ (Clsd‘𝐽)
9190a1i 11 . . . . 5 ((𝜑𝑘 ∈ ℕ) → 𝑋 ∈ (Clsd‘𝐽))
926, 85, 91pm2.61ne 2908 . . . 4 ((𝜑𝑘 ∈ ℕ) → {𝑧𝑋 ∣ ∀𝑡𝑇 (𝑁‘(𝑡𝑧)) ≤ 𝑘} ∈ (Clsd‘𝐽))
93 ubthlem.9 . . . 4 𝐴 = (𝑘 ∈ ℕ ↦ {𝑧𝑋 ∣ ∀𝑡𝑇 (𝑁‘(𝑡𝑧)) ≤ 𝑘})
9492, 93fmptd 6425 . . 3 (𝜑𝐴:ℕ⟶(Clsd‘𝐽))
95 frn 6091 . . . . . . 7 (𝐴:ℕ⟶(Clsd‘𝐽) → ran 𝐴 ⊆ (Clsd‘𝐽))
9694, 95syl 17 . . . . . 6 (𝜑 → ran 𝐴 ⊆ (Clsd‘𝐽))
9788cldss2 20882 . . . . . 6 (Clsd‘𝐽) ⊆ 𝒫 𝑋
9896, 97syl6ss 3648 . . . . 5 (𝜑 → ran 𝐴 ⊆ 𝒫 𝑋)
99 sspwuni 4643 . . . . 5 (ran 𝐴 ⊆ 𝒫 𝑋 ran 𝐴𝑋)
10098, 99sylib 208 . . . 4 (𝜑 ran 𝐴𝑋)
101 ubthlem.8 . . . . . 6 (𝜑 → ∀𝑥𝑋𝑐 ∈ ℝ ∀𝑡𝑇 (𝑁‘(𝑡𝑥)) ≤ 𝑐)
102 arch 11327 . . . . . . . . . 10 (𝑐 ∈ ℝ → ∃𝑘 ∈ ℕ 𝑐 < 𝑘)
103102adantl 481 . . . . . . . . 9 (((𝜑𝑥𝑋) ∧ 𝑐 ∈ ℝ) → ∃𝑘 ∈ ℕ 𝑐 < 𝑘)
104 simpr 476 . . . . . . . . . . . . . . . . 17 (((𝜑𝑥𝑋) ∧ 𝑐 ∈ ℝ) → 𝑐 ∈ ℝ)
105 ltle 10164 . . . . . . . . . . . . . . . . 17 ((𝑐 ∈ ℝ ∧ 𝑘 ∈ ℝ) → (𝑐 < 𝑘𝑐𝑘))
106104, 58, 105syl2an 493 . . . . . . . . . . . . . . . 16 ((((𝜑𝑥𝑋) ∧ 𝑐 ∈ ℝ) ∧ 𝑘 ∈ ℕ) → (𝑐 < 𝑘𝑐𝑘))
107106impr 648 . . . . . . . . . . . . . . 15 ((((𝜑𝑥𝑋) ∧ 𝑐 ∈ ℝ) ∧ (𝑘 ∈ ℕ ∧ 𝑐 < 𝑘)) → 𝑐𝑘)
108107adantr 480 . . . . . . . . . . . . . 14 (((((𝜑𝑥𝑋) ∧ 𝑐 ∈ ℝ) ∧ (𝑘 ∈ ℕ ∧ 𝑐 < 𝑘)) ∧ 𝑡𝑇) → 𝑐𝑘)
10939ffvelrnda 6399 . . . . . . . . . . . . . . . . . . 19 (((𝜑𝑡𝑇) ∧ 𝑥𝑋) → (𝑡𝑥) ∈ (BaseSet‘𝑊))
110109an32s 863 . . . . . . . . . . . . . . . . . 18 (((𝜑𝑥𝑋) ∧ 𝑡𝑇) → (𝑡𝑥) ∈ (BaseSet‘𝑊))
11130, 64nvcl 27644 . . . . . . . . . . . . . . . . . 18 ((𝑊 ∈ NrmCVec ∧ (𝑡𝑥) ∈ (BaseSet‘𝑊)) → (𝑁‘(𝑡𝑥)) ∈ ℝ)
11220, 110, 111sylancr 696 . . . . . . . . . . . . . . . . 17 (((𝜑𝑥𝑋) ∧ 𝑡𝑇) → (𝑁‘(𝑡𝑥)) ∈ ℝ)
113112adantlr 751 . . . . . . . . . . . . . . . 16 ((((𝜑𝑥𝑋) ∧ 𝑐 ∈ ℝ) ∧ 𝑡𝑇) → (𝑁‘(𝑡𝑥)) ∈ ℝ)
114113adantlr 751 . . . . . . . . . . . . . . 15 (((((𝜑𝑥𝑋) ∧ 𝑐 ∈ ℝ) ∧ (𝑘 ∈ ℕ ∧ 𝑐 < 𝑘)) ∧ 𝑡𝑇) → (𝑁‘(𝑡𝑥)) ∈ ℝ)
115 simpllr 815 . . . . . . . . . . . . . . 15 (((((𝜑𝑥𝑋) ∧ 𝑐 ∈ ℝ) ∧ (𝑘 ∈ ℕ ∧ 𝑐 < 𝑘)) ∧ 𝑡𝑇) → 𝑐 ∈ ℝ)
116 simplrl 817 . . . . . . . . . . . . . . . 16 (((((𝜑𝑥𝑋) ∧ 𝑐 ∈ ℝ) ∧ (𝑘 ∈ ℕ ∧ 𝑐 < 𝑘)) ∧ 𝑡𝑇) → 𝑘 ∈ ℕ)
117116, 58syl 17 . . . . . . . . . . . . . . 15 (((((𝜑𝑥𝑋) ∧ 𝑐 ∈ ℝ) ∧ (𝑘 ∈ ℕ ∧ 𝑐 < 𝑘)) ∧ 𝑡𝑇) → 𝑘 ∈ ℝ)
118 letr 10169 . . . . . . . . . . . . . . 15 (((𝑁‘(𝑡𝑥)) ∈ ℝ ∧ 𝑐 ∈ ℝ ∧ 𝑘 ∈ ℝ) → (((𝑁‘(𝑡𝑥)) ≤ 𝑐𝑐𝑘) → (𝑁‘(𝑡𝑥)) ≤ 𝑘))
119114, 115, 117, 118syl3anc 1366 . . . . . . . . . . . . . 14 (((((𝜑𝑥𝑋) ∧ 𝑐 ∈ ℝ) ∧ (𝑘 ∈ ℕ ∧ 𝑐 < 𝑘)) ∧ 𝑡𝑇) → (((𝑁‘(𝑡𝑥)) ≤ 𝑐𝑐𝑘) → (𝑁‘(𝑡𝑥)) ≤ 𝑘))
120108, 119mpan2d 710 . . . . . . . . . . . . 13 (((((𝜑𝑥𝑋) ∧ 𝑐 ∈ ℝ) ∧ (𝑘 ∈ ℕ ∧ 𝑐 < 𝑘)) ∧ 𝑡𝑇) → ((𝑁‘(𝑡𝑥)) ≤ 𝑐 → (𝑁‘(𝑡𝑥)) ≤ 𝑘))
121120ralimdva 2991 . . . . . . . . . . . 12 ((((𝜑𝑥𝑋) ∧ 𝑐 ∈ ℝ) ∧ (𝑘 ∈ ℕ ∧ 𝑐 < 𝑘)) → (∀𝑡𝑇 (𝑁‘(𝑡𝑥)) ≤ 𝑐 → ∀𝑡𝑇 (𝑁‘(𝑡𝑥)) ≤ 𝑘))
122121expr 642 . . . . . . . . . . 11 ((((𝜑𝑥𝑋) ∧ 𝑐 ∈ ℝ) ∧ 𝑘 ∈ ℕ) → (𝑐 < 𝑘 → (∀𝑡𝑇 (𝑁‘(𝑡𝑥)) ≤ 𝑐 → ∀𝑡𝑇 (𝑁‘(𝑡𝑥)) ≤ 𝑘)))
123 fvex 6239 . . . . . . . . . . . . . . . . . . 19 (BaseSet‘𝑈) ∈ V
12422, 123eqeltri 2726 . . . . . . . . . . . . . . . . . 18 𝑋 ∈ V
125124rabex 4845 . . . . . . . . . . . . . . . . 17 {𝑧𝑋 ∣ ∀𝑡𝑇 (𝑁‘(𝑡𝑧)) ≤ 𝑘} ∈ V
12693fvmpt2 6330 . . . . . . . . . . . . . . . . 17 ((𝑘 ∈ ℕ ∧ {𝑧𝑋 ∣ ∀𝑡𝑇 (𝑁‘(𝑡𝑧)) ≤ 𝑘} ∈ V) → (𝐴𝑘) = {𝑧𝑋 ∣ ∀𝑡𝑇 (𝑁‘(𝑡𝑧)) ≤ 𝑘})
127125, 126mpan2 707 . . . . . . . . . . . . . . . 16 (𝑘 ∈ ℕ → (𝐴𝑘) = {𝑧𝑋 ∣ ∀𝑡𝑇 (𝑁‘(𝑡𝑧)) ≤ 𝑘})
128127eleq2d 2716 . . . . . . . . . . . . . . 15 (𝑘 ∈ ℕ → (𝑥 ∈ (𝐴𝑘) ↔ 𝑥 ∈ {𝑧𝑋 ∣ ∀𝑡𝑇 (𝑁‘(𝑡𝑧)) ≤ 𝑘}))
12950ralbidv 3015 . . . . . . . . . . . . . . . 16 (𝑧 = 𝑥 → (∀𝑡𝑇 (𝑁‘(𝑡𝑧)) ≤ 𝑘 ↔ ∀𝑡𝑇 (𝑁‘(𝑡𝑥)) ≤ 𝑘))
130129elrab 3396 . . . . . . . . . . . . . . 15 (𝑥 ∈ {𝑧𝑋 ∣ ∀𝑡𝑇 (𝑁‘(𝑡𝑧)) ≤ 𝑘} ↔ (𝑥𝑋 ∧ ∀𝑡𝑇 (𝑁‘(𝑡𝑥)) ≤ 𝑘))
131128, 130syl6bb 276 . . . . . . . . . . . . . 14 (𝑘 ∈ ℕ → (𝑥 ∈ (𝐴𝑘) ↔ (𝑥𝑋 ∧ ∀𝑡𝑇 (𝑁‘(𝑡𝑥)) ≤ 𝑘)))
132 simpr 476 . . . . . . . . . . . . . . . 16 ((𝜑𝑥𝑋) → 𝑥𝑋)
133132biantrurd 528 . . . . . . . . . . . . . . 15 ((𝜑𝑥𝑋) → (∀𝑡𝑇 (𝑁‘(𝑡𝑥)) ≤ 𝑘 ↔ (𝑥𝑋 ∧ ∀𝑡𝑇 (𝑁‘(𝑡𝑥)) ≤ 𝑘)))
134133bicomd 213 . . . . . . . . . . . . . 14 ((𝜑𝑥𝑋) → ((𝑥𝑋 ∧ ∀𝑡𝑇 (𝑁‘(𝑡𝑥)) ≤ 𝑘) ↔ ∀𝑡𝑇 (𝑁‘(𝑡𝑥)) ≤ 𝑘))
135131, 134sylan9bbr 737 . . . . . . . . . . . . 13 (((𝜑𝑥𝑋) ∧ 𝑘 ∈ ℕ) → (𝑥 ∈ (𝐴𝑘) ↔ ∀𝑡𝑇 (𝑁‘(𝑡𝑥)) ≤ 𝑘))
136 ffn 6083 . . . . . . . . . . . . . . . 16 (𝐴:ℕ⟶(Clsd‘𝐽) → 𝐴 Fn ℕ)
13794, 136syl 17 . . . . . . . . . . . . . . 15 (𝜑𝐴 Fn ℕ)
138137adantr 480 . . . . . . . . . . . . . 14 ((𝜑𝑥𝑋) → 𝐴 Fn ℕ)
139 fnfvelrn 6396 . . . . . . . . . . . . . . . 16 ((𝐴 Fn ℕ ∧ 𝑘 ∈ ℕ) → (𝐴𝑘) ∈ ran 𝐴)
140 elssuni 4499 . . . . . . . . . . . . . . . 16 ((𝐴𝑘) ∈ ran 𝐴 → (𝐴𝑘) ⊆ ran 𝐴)
141139, 140syl 17 . . . . . . . . . . . . . . 15 ((𝐴 Fn ℕ ∧ 𝑘 ∈ ℕ) → (𝐴𝑘) ⊆ ran 𝐴)
142141sseld 3635 . . . . . . . . . . . . . 14 ((𝐴 Fn ℕ ∧ 𝑘 ∈ ℕ) → (𝑥 ∈ (𝐴𝑘) → 𝑥 ran 𝐴))
143138, 142sylan 487 . . . . . . . . . . . . 13 (((𝜑𝑥𝑋) ∧ 𝑘 ∈ ℕ) → (𝑥 ∈ (𝐴𝑘) → 𝑥 ran 𝐴))
144135, 143sylbird 250 . . . . . . . . . . . 12 (((𝜑𝑥𝑋) ∧ 𝑘 ∈ ℕ) → (∀𝑡𝑇 (𝑁‘(𝑡𝑥)) ≤ 𝑘𝑥 ran 𝐴))
145144adantlr 751 . . . . . . . . . . 11 ((((𝜑𝑥𝑋) ∧ 𝑐 ∈ ℝ) ∧ 𝑘 ∈ ℕ) → (∀𝑡𝑇 (𝑁‘(𝑡𝑥)) ≤ 𝑘𝑥 ran 𝐴))
146122, 145syl6d 75 . . . . . . . . . 10 ((((𝜑𝑥𝑋) ∧ 𝑐 ∈ ℝ) ∧ 𝑘 ∈ ℕ) → (𝑐 < 𝑘 → (∀𝑡𝑇 (𝑁‘(𝑡𝑥)) ≤ 𝑐𝑥 ran 𝐴)))
147146rexlimdva 3060 . . . . . . . . 9 (((𝜑𝑥𝑋) ∧ 𝑐 ∈ ℝ) → (∃𝑘 ∈ ℕ 𝑐 < 𝑘 → (∀𝑡𝑇 (𝑁‘(𝑡𝑥)) ≤ 𝑐𝑥 ran 𝐴)))
148103, 147mpd 15 . . . . . . . 8 (((𝜑𝑥𝑋) ∧ 𝑐 ∈ ℝ) → (∀𝑡𝑇 (𝑁‘(𝑡𝑥)) ≤ 𝑐𝑥 ran 𝐴))
149148rexlimdva 3060 . . . . . . 7 ((𝜑𝑥𝑋) → (∃𝑐 ∈ ℝ ∀𝑡𝑇 (𝑁‘(𝑡𝑥)) ≤ 𝑐𝑥 ran 𝐴))
150149ralimdva 2991 . . . . . 6 (𝜑 → (∀𝑥𝑋𝑐 ∈ ℝ ∀𝑡𝑇 (𝑁‘(𝑡𝑥)) ≤ 𝑐 → ∀𝑥𝑋 𝑥 ran 𝐴))
151101, 150mpd 15 . . . . 5 (𝜑 → ∀𝑥𝑋 𝑥 ran 𝐴)
152 dfss3 3625 . . . . 5 (𝑋 ran 𝐴 ↔ ∀𝑥𝑋 𝑥 ran 𝐴)
153151, 152sylibr 224 . . . 4 (𝜑𝑋 ran 𝐴)
154100, 153eqssd 3653 . . 3 (𝜑 ran 𝐴 = 𝑋)
155 eqid 2651 . . . . . 6 (0vec𝑈) = (0vec𝑈)
15622, 155nvzcl 27617 . . . . 5 (𝑈 ∈ NrmCVec → (0vec𝑈) ∈ 𝑋)
157 ne0i 3954 . . . . 5 ((0vec𝑈) ∈ 𝑋𝑋 ≠ ∅)
15819, 156, 157mp2b 10 . . . 4 𝑋 ≠ ∅
15914bcth2 23173 . . . 4 (((𝐷 ∈ (CMet‘𝑋) ∧ 𝑋 ≠ ∅) ∧ (𝐴:ℕ⟶(Clsd‘𝐽) ∧ ran 𝐴 = 𝑋)) → ∃𝑛 ∈ ℕ ((int‘𝐽)‘(𝐴𝑛)) ≠ ∅)
16024, 158, 159mpanl12 718 . . 3 ((𝐴:ℕ⟶(Clsd‘𝐽) ∧ ran 𝐴 = 𝑋) → ∃𝑛 ∈ ℕ ((int‘𝐽)‘(𝐴𝑛)) ≠ ∅)
16194, 154, 160syl2anc 694 . 2 (𝜑 → ∃𝑛 ∈ ℕ ((int‘𝐽)‘(𝐴𝑛)) ≠ ∅)
162 ffvelrn 6397 . . . . . . . . . . 11 ((𝐴:ℕ⟶(Clsd‘𝐽) ∧ 𝑛 ∈ ℕ) → (𝐴𝑛) ∈ (Clsd‘𝐽))
16397, 162sseldi 3634 . . . . . . . . . 10 ((𝐴:ℕ⟶(Clsd‘𝐽) ∧ 𝑛 ∈ ℕ) → (𝐴𝑛) ∈ 𝒫 𝑋)
164163elpwid 4203 . . . . . . . . 9 ((𝐴:ℕ⟶(Clsd‘𝐽) ∧ 𝑛 ∈ ℕ) → (𝐴𝑛) ⊆ 𝑋)
16594, 164sylan 487 . . . . . . . 8 ((𝜑𝑛 ∈ ℕ) → (𝐴𝑛) ⊆ 𝑋)
16688ntrss3 20912 . . . . . . . 8 ((𝐽 ∈ Top ∧ (𝐴𝑛) ⊆ 𝑋) → ((int‘𝐽)‘(𝐴𝑛)) ⊆ 𝑋)
16787, 165, 166sylancr 696 . . . . . . 7 ((𝜑𝑛 ∈ ℕ) → ((int‘𝐽)‘(𝐴𝑛)) ⊆ 𝑋)
168167sseld 3635 . . . . . 6 ((𝜑𝑛 ∈ ℕ) → (𝑦 ∈ ((int‘𝐽)‘(𝐴𝑛)) → 𝑦𝑋))
16988ntropn 20901 . . . . . . . . . 10 ((𝐽 ∈ Top ∧ (𝐴𝑛) ⊆ 𝑋) → ((int‘𝐽)‘(𝐴𝑛)) ∈ 𝐽)
17087, 165, 169sylancr 696 . . . . . . . . 9 ((𝜑𝑛 ∈ ℕ) → ((int‘𝐽)‘(𝐴𝑛)) ∈ 𝐽)
17114mopni2 22345 . . . . . . . . . 10 ((𝐷 ∈ (∞Met‘𝑋) ∧ ((int‘𝐽)‘(𝐴𝑛)) ∈ 𝐽𝑦 ∈ ((int‘𝐽)‘(𝐴𝑛))) → ∃𝑥 ∈ ℝ+ (𝑦(ball‘𝐷)𝑥) ⊆ ((int‘𝐽)‘(𝐴𝑛)))
17227, 171mp3an1 1451 . . . . . . . . 9 ((((int‘𝐽)‘(𝐴𝑛)) ∈ 𝐽𝑦 ∈ ((int‘𝐽)‘(𝐴𝑛))) → ∃𝑥 ∈ ℝ+ (𝑦(ball‘𝐷)𝑥) ⊆ ((int‘𝐽)‘(𝐴𝑛)))
173170, 172sylan 487 . . . . . . . 8 (((𝜑𝑛 ∈ ℕ) ∧ 𝑦 ∈ ((int‘𝐽)‘(𝐴𝑛))) → ∃𝑥 ∈ ℝ+ (𝑦(ball‘𝐷)𝑥) ⊆ ((int‘𝐽)‘(𝐴𝑛)))
174 elssuni 4499 . . . . . . . . . . . 12 (((int‘𝐽)‘(𝐴𝑛)) ∈ 𝐽 → ((int‘𝐽)‘(𝐴𝑛)) ⊆ 𝐽)
175174, 88syl6sseqr 3685 . . . . . . . . . . 11 (((int‘𝐽)‘(𝐴𝑛)) ∈ 𝐽 → ((int‘𝐽)‘(𝐴𝑛)) ⊆ 𝑋)
176170, 175syl 17 . . . . . . . . . 10 ((𝜑𝑛 ∈ ℕ) → ((int‘𝐽)‘(𝐴𝑛)) ⊆ 𝑋)
177176sselda 3636 . . . . . . . . 9 (((𝜑𝑛 ∈ ℕ) ∧ 𝑦 ∈ ((int‘𝐽)‘(𝐴𝑛))) → 𝑦𝑋)
17888ntrss2 20909 . . . . . . . . . . . . . 14 ((𝐽 ∈ Top ∧ (𝐴𝑛) ⊆ 𝑋) → ((int‘𝐽)‘(𝐴𝑛)) ⊆ (𝐴𝑛))
17987, 165, 178sylancr 696 . . . . . . . . . . . . 13 ((𝜑𝑛 ∈ ℕ) → ((int‘𝐽)‘(𝐴𝑛)) ⊆ (𝐴𝑛))
180 sstr2 3643 . . . . . . . . . . . . 13 ((𝑦(ball‘𝐷)𝑥) ⊆ ((int‘𝐽)‘(𝐴𝑛)) → (((int‘𝐽)‘(𝐴𝑛)) ⊆ (𝐴𝑛) → (𝑦(ball‘𝐷)𝑥) ⊆ (𝐴𝑛)))
181179, 180syl5com 31 . . . . . . . . . . . 12 ((𝜑𝑛 ∈ ℕ) → ((𝑦(ball‘𝐷)𝑥) ⊆ ((int‘𝐽)‘(𝐴𝑛)) → (𝑦(ball‘𝐷)𝑥) ⊆ (𝐴𝑛)))
182181ad2antrr 762 . . . . . . . . . . 11 ((((𝜑𝑛 ∈ ℕ) ∧ 𝑦𝑋) ∧ 𝑥 ∈ ℝ+) → ((𝑦(ball‘𝐷)𝑥) ⊆ ((int‘𝐽)‘(𝐴𝑛)) → (𝑦(ball‘𝐷)𝑥) ⊆ (𝐴𝑛)))
183 simpr 476 . . . . . . . . . . . . . 14 (((𝜑𝑛 ∈ ℕ) ∧ 𝑦𝑋) → 𝑦𝑋)
184183, 27jctil 559 . . . . . . . . . . . . 13 (((𝜑𝑛 ∈ ℕ) ∧ 𝑦𝑋) → (𝐷 ∈ (∞Met‘𝑋) ∧ 𝑦𝑋))
185 rphalfcl 11896 . . . . . . . . . . . . . . 15 (𝑥 ∈ ℝ+ → (𝑥 / 2) ∈ ℝ+)
186185rpxrd 11911 . . . . . . . . . . . . . 14 (𝑥 ∈ ℝ+ → (𝑥 / 2) ∈ ℝ*)
187 rpxr 11878 . . . . . . . . . . . . . 14 (𝑥 ∈ ℝ+𝑥 ∈ ℝ*)
188 rphalflt 11898 . . . . . . . . . . . . . 14 (𝑥 ∈ ℝ+ → (𝑥 / 2) < 𝑥)
189186, 187, 1883jca 1261 . . . . . . . . . . . . 13 (𝑥 ∈ ℝ+ → ((𝑥 / 2) ∈ ℝ*𝑥 ∈ ℝ* ∧ (𝑥 / 2) < 𝑥))
190 eqid 2651 . . . . . . . . . . . . . 14 {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ (𝑥 / 2)} = {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ (𝑥 / 2)}
19114, 190blsscls2 22356 . . . . . . . . . . . . 13 (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑦𝑋) ∧ ((𝑥 / 2) ∈ ℝ*𝑥 ∈ ℝ* ∧ (𝑥 / 2) < 𝑥)) → {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ (𝑥 / 2)} ⊆ (𝑦(ball‘𝐷)𝑥))
192184, 189, 191syl2an 493 . . . . . . . . . . . 12 ((((𝜑𝑛 ∈ ℕ) ∧ 𝑦𝑋) ∧ 𝑥 ∈ ℝ+) → {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ (𝑥 / 2)} ⊆ (𝑦(ball‘𝐷)𝑥))
193 sstr2 3643 . . . . . . . . . . . 12 ({𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ (𝑥 / 2)} ⊆ (𝑦(ball‘𝐷)𝑥) → ((𝑦(ball‘𝐷)𝑥) ⊆ (𝐴𝑛) → {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ (𝑥 / 2)} ⊆ (𝐴𝑛)))
194192, 193syl 17 . . . . . . . . . . 11 ((((𝜑𝑛 ∈ ℕ) ∧ 𝑦𝑋) ∧ 𝑥 ∈ ℝ+) → ((𝑦(ball‘𝐷)𝑥) ⊆ (𝐴𝑛) → {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ (𝑥 / 2)} ⊆ (𝐴𝑛)))
195185adantl 481 . . . . . . . . . . . 12 ((((𝜑𝑛 ∈ ℕ) ∧ 𝑦𝑋) ∧ 𝑥 ∈ ℝ+) → (𝑥 / 2) ∈ ℝ+)
196 breq2 4689 . . . . . . . . . . . . . . . 16 (𝑟 = (𝑥 / 2) → ((𝑦𝐷𝑧) ≤ 𝑟 ↔ (𝑦𝐷𝑧) ≤ (𝑥 / 2)))
197196rabbidv 3220 . . . . . . . . . . . . . . 15 (𝑟 = (𝑥 / 2) → {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ 𝑟} = {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ (𝑥 / 2)})
198197sseq1d 3665 . . . . . . . . . . . . . 14 (𝑟 = (𝑥 / 2) → ({𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ 𝑟} ⊆ (𝐴𝑛) ↔ {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ (𝑥 / 2)} ⊆ (𝐴𝑛)))
199198rspcev 3340 . . . . . . . . . . . . 13 (((𝑥 / 2) ∈ ℝ+ ∧ {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ (𝑥 / 2)} ⊆ (𝐴𝑛)) → ∃𝑟 ∈ ℝ+ {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ 𝑟} ⊆ (𝐴𝑛))
200199ex 449 . . . . . . . . . . . 12 ((𝑥 / 2) ∈ ℝ+ → ({𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ (𝑥 / 2)} ⊆ (𝐴𝑛) → ∃𝑟 ∈ ℝ+ {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ 𝑟} ⊆ (𝐴𝑛)))
201195, 200syl 17 . . . . . . . . . . 11 ((((𝜑𝑛 ∈ ℕ) ∧ 𝑦𝑋) ∧ 𝑥 ∈ ℝ+) → ({𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ (𝑥 / 2)} ⊆ (𝐴𝑛) → ∃𝑟 ∈ ℝ+ {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ 𝑟} ⊆ (𝐴𝑛)))
202182, 194, 2013syld 60 . . . . . . . . . 10 ((((𝜑𝑛 ∈ ℕ) ∧ 𝑦𝑋) ∧ 𝑥 ∈ ℝ+) → ((𝑦(ball‘𝐷)𝑥) ⊆ ((int‘𝐽)‘(𝐴𝑛)) → ∃𝑟 ∈ ℝ+ {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ 𝑟} ⊆ (𝐴𝑛)))
203202rexlimdva 3060 . . . . . . . . 9 (((𝜑𝑛 ∈ ℕ) ∧ 𝑦𝑋) → (∃𝑥 ∈ ℝ+ (𝑦(ball‘𝐷)𝑥) ⊆ ((int‘𝐽)‘(𝐴𝑛)) → ∃𝑟 ∈ ℝ+ {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ 𝑟} ⊆ (𝐴𝑛)))
204177, 203syldan 486 . . . . . . . 8 (((𝜑𝑛 ∈ ℕ) ∧ 𝑦 ∈ ((int‘𝐽)‘(𝐴𝑛))) → (∃𝑥 ∈ ℝ+ (𝑦(ball‘𝐷)𝑥) ⊆ ((int‘𝐽)‘(𝐴𝑛)) → ∃𝑟 ∈ ℝ+ {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ 𝑟} ⊆ (𝐴𝑛)))
205173, 204mpd 15 . . . . . . 7 (((𝜑𝑛 ∈ ℕ) ∧ 𝑦 ∈ ((int‘𝐽)‘(𝐴𝑛))) → ∃𝑟 ∈ ℝ+ {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ 𝑟} ⊆ (𝐴𝑛))
206205ex 449 . . . . . 6 ((𝜑𝑛 ∈ ℕ) → (𝑦 ∈ ((int‘𝐽)‘(𝐴𝑛)) → ∃𝑟 ∈ ℝ+ {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ 𝑟} ⊆ (𝐴𝑛)))
207168, 206jcad 554 . . . . 5 ((𝜑𝑛 ∈ ℕ) → (𝑦 ∈ ((int‘𝐽)‘(𝐴𝑛)) → (𝑦𝑋 ∧ ∃𝑟 ∈ ℝ+ {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ 𝑟} ⊆ (𝐴𝑛))))
208207eximdv 1886 . . . 4 ((𝜑𝑛 ∈ ℕ) → (∃𝑦 𝑦 ∈ ((int‘𝐽)‘(𝐴𝑛)) → ∃𝑦(𝑦𝑋 ∧ ∃𝑟 ∈ ℝ+ {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ 𝑟} ⊆ (𝐴𝑛))))
209 n0 3964 . . . 4 (((int‘𝐽)‘(𝐴𝑛)) ≠ ∅ ↔ ∃𝑦 𝑦 ∈ ((int‘𝐽)‘(𝐴𝑛)))
210 df-rex 2947 . . . 4 (∃𝑦𝑋𝑟 ∈ ℝ+ {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ 𝑟} ⊆ (𝐴𝑛) ↔ ∃𝑦(𝑦𝑋 ∧ ∃𝑟 ∈ ℝ+ {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ 𝑟} ⊆ (𝐴𝑛)))
211208, 209, 2103imtr4g 285 . . 3 ((𝜑𝑛 ∈ ℕ) → (((int‘𝐽)‘(𝐴𝑛)) ≠ ∅ → ∃𝑦𝑋𝑟 ∈ ℝ+ {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ 𝑟} ⊆ (𝐴𝑛)))
212211reximdva 3046 . 2 (𝜑 → (∃𝑛 ∈ ℕ ((int‘𝐽)‘(𝐴𝑛)) ≠ ∅ → ∃𝑛 ∈ ℕ ∃𝑦𝑋𝑟 ∈ ℝ+ {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ 𝑟} ⊆ (𝐴𝑛)))
213161, 212mpd 15 1 (𝜑 → ∃𝑛 ∈ ℕ ∃𝑦𝑋𝑟 ∈ ℝ+ {𝑧𝑋 ∣ (𝑦𝐷𝑧) ≤ 𝑟} ⊆ (𝐴𝑛))
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ↔ wb 196   ∧ wa 383   ∧ w3a 1054   = wceq 1523  ∃wex 1744   ∈ wcel 2030   ≠ wne 2823  ∀wral 2941  ∃wrex 2942  {crab 2945  Vcvv 3231   ⊆ wss 3607  ∅c0 3948  𝒫 cpw 4191  ∪ cuni 4468  ∩ ciin 4553   class class class wbr 4685   ↦ cmpt 4762  ◡ccnv 5142  ran crn 5144   “ cima 5146   Fn wfn 5921  ⟶wf 5922  ‘cfv 5926  (class class class)co 6690  ℝcr 9973  ℝ*cxr 10111   < clt 10112   ≤ cle 10113   / cdiv 10722  ℕcn 11058  2c2 11108  ℝ+crp 11870  ∞Metcxmt 19779  Metcme 19780  ballcbl 19781  MetOpencmopn 19784  Topctop 20746  TopOnctopon 20763  Clsdccld 20868  intcnt 20869   Cn ccn 21076  CMetcms 23098  NrmCVeccnv 27567  BaseSetcba 27569  0veccn0v 27571  normCVcnmcv 27573  IndMetcims 27574   BLnOp cblo 27725  CBanccbn 27846 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-8 2032  ax-9 2039  ax-10 2059  ax-11 2074  ax-12 2087  ax-13 2282  ax-ext 2631  ax-rep 4804  ax-sep 4814  ax-nul 4822  ax-pow 4873  ax-pr 4936  ax-un 6991  ax-inf2 8576  ax-dc 9306  ax-cnex 10030  ax-resscn 10031  ax-1cn 10032  ax-icn 10033  ax-addcl 10034  ax-addrcl 10035  ax-mulcl 10036  ax-mulrcl 10037  ax-mulcom 10038  ax-addass 10039  ax-mulass 10040  ax-distr 10041  ax-i2m1 10042  ax-1ne0 10043  ax-1rid 10044  ax-rnegex 10045  ax-rrecex 10046  ax-cnre 10047  ax-pre-lttri 10048  ax-pre-lttrn 10049  ax-pre-ltadd 10050  ax-pre-mulgt0 10051  ax-pre-sup 10052  ax-addf 10053  ax-mulf 10054 This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3or 1055  df-3an 1056  df-tru 1526  df-ex 1745  df-nf 1750  df-sb 1938  df-eu 2502  df-mo 2503  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-ne 2824  df-nel 2927  df-ral 2946  df-rex 2947  df-reu 2948  df-rmo 2949  df-rab 2950  df-v 3233  df-sbc 3469  df-csb 3567  df-dif 3610  df-un 3612  df-in 3614  df-ss 3621  df-pss 3623  df-nul 3949  df-if 4120  df-pw 4193  df-sn 4211  df-pr 4213  df-tp 4215  df-op 4217  df-uni 4469  df-int 4508  df-iun 4554  df-iin 4555  df-br 4686  df-opab 4746  df-mpt 4763  df-tr 4786  df-id 5053  df-eprel 5058  df-po 5064  df-so 5065  df-fr 5102  df-we 5104  df-xp 5149  df-rel 5150  df-cnv 5151  df-co 5152  df-dm 5153  df-rn 5154  df-res 5155  df-ima 5156  df-pred 5718  df-ord 5764  df-on 5765  df-lim 5766  df-suc 5767  df-iota 5889  df-fun 5928  df-fn 5929  df-f 5930  df-f1 5931  df-fo 5932  df-f1o 5933  df-fv 5934  df-riota 6651  df-ov 6693  df-oprab 6694  df-mpt2 6695  df-om 7108  df-1st 7210  df-2nd 7211  df-wrecs 7452  df-recs 7513  df-rdg 7551  df-1o 7605  df-er 7787  df-map 7901  df-pm 7902  df-en 7998  df-dom 7999  df-sdom 8000  df-sup 8389  df-inf 8390  df-pnf 10114  df-mnf 10115  df-xr 10116  df-ltxr 10117  df-le 10118  df-sub 10306  df-neg 10307  df-div 10723  df-nn 11059  df-2 11117  df-3 11118  df-n0 11331  df-z 11416  df-uz 11726  df-q 11827  df-rp 11871  df-xneg 11984  df-xadd 11985  df-xmul 11986  df-ico 12219  df-seq 12842  df-exp 12901  df-cj 13883  df-re 13884  df-im 13885  df-sqrt 14019  df-abs 14020  df-rest 16130  df-topgen 16151  df-psmet 19786  df-xmet 19787  df-met 19788  df-bl 19789  df-mopn 19790  df-fbas 19791  df-fg 19792  df-top 20747  df-topon 20764  df-bases 20798  df-cld 20871  df-ntr 20872  df-cls 20873  df-nei 20950  df-cn 21079  df-cnp 21080  df-lm 21081  df-fil 21697  df-fm 21789  df-flim 21790  df-flf 21791  df-cfil 23099  df-cau 23100  df-cmet 23101  df-grpo 27475  df-gid 27476  df-ginv 27477  df-gdiv 27478  df-ablo 27527  df-vc 27542  df-nv 27575  df-va 27578  df-ba 27579  df-sm 27580  df-0v 27581  df-vs 27582  df-nmcv 27583  df-ims 27584  df-lno 27727  df-nmoo 27728  df-blo 27729  df-0o 27730  df-cbn 27847 This theorem is referenced by:  ubthlem3  27856
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