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Mirrors > Home > MPE Home > Th. List > bcthlem3 | Structured version Visualization version GIF version |
Description: Lemma for bcth 24398. The limit point of the centers in the sequence is in the intersection of every ball in the sequence. (Contributed by Mario Carneiro, 7-Jan-2014.) |
Ref | Expression |
---|---|
bcth.2 | ⊢ 𝐽 = (MetOpen‘𝐷) |
bcthlem.4 | ⊢ (𝜑 → 𝐷 ∈ (CMet‘𝑋)) |
bcthlem.5 | ⊢ 𝐹 = (𝑘 ∈ ℕ, 𝑧 ∈ (𝑋 × ℝ+) ↦ {〈𝑥, 𝑟〉 ∣ ((𝑥 ∈ 𝑋 ∧ 𝑟 ∈ ℝ+) ∧ (𝑟 < (1 / 𝑘) ∧ ((cls‘𝐽)‘(𝑥(ball‘𝐷)𝑟)) ⊆ (((ball‘𝐷)‘𝑧) ∖ (𝑀‘𝑘))))}) |
bcthlem.6 | ⊢ (𝜑 → 𝑀:ℕ⟶(Clsd‘𝐽)) |
bcthlem.7 | ⊢ (𝜑 → 𝑅 ∈ ℝ+) |
bcthlem.8 | ⊢ (𝜑 → 𝐶 ∈ 𝑋) |
bcthlem.9 | ⊢ (𝜑 → 𝑔:ℕ⟶(𝑋 × ℝ+)) |
bcthlem.10 | ⊢ (𝜑 → (𝑔‘1) = 〈𝐶, 𝑅〉) |
bcthlem.11 | ⊢ (𝜑 → ∀𝑘 ∈ ℕ (𝑔‘(𝑘 + 1)) ∈ (𝑘𝐹(𝑔‘𝑘))) |
Ref | Expression |
---|---|
bcthlem3 | ⊢ ((𝜑 ∧ (1st ∘ 𝑔)(⇝𝑡‘𝐽)𝑥 ∧ 𝐴 ∈ ℕ) → 𝑥 ∈ ((ball‘𝐷)‘(𝑔‘𝐴))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bcthlem.11 | . . . . . . 7 ⊢ (𝜑 → ∀𝑘 ∈ ℕ (𝑔‘(𝑘 + 1)) ∈ (𝑘𝐹(𝑔‘𝑘))) | |
2 | fvoveq1 7278 | . . . . . . . . 9 ⊢ (𝑘 = 𝐴 → (𝑔‘(𝑘 + 1)) = (𝑔‘(𝐴 + 1))) | |
3 | id 22 | . . . . . . . . . 10 ⊢ (𝑘 = 𝐴 → 𝑘 = 𝐴) | |
4 | fveq2 6756 | . . . . . . . . . 10 ⊢ (𝑘 = 𝐴 → (𝑔‘𝑘) = (𝑔‘𝐴)) | |
5 | 3, 4 | oveq12d 7273 | . . . . . . . . 9 ⊢ (𝑘 = 𝐴 → (𝑘𝐹(𝑔‘𝑘)) = (𝐴𝐹(𝑔‘𝐴))) |
6 | 2, 5 | eleq12d 2833 | . . . . . . . 8 ⊢ (𝑘 = 𝐴 → ((𝑔‘(𝑘 + 1)) ∈ (𝑘𝐹(𝑔‘𝑘)) ↔ (𝑔‘(𝐴 + 1)) ∈ (𝐴𝐹(𝑔‘𝐴)))) |
7 | 6 | rspccva 3551 | . . . . . . 7 ⊢ ((∀𝑘 ∈ ℕ (𝑔‘(𝑘 + 1)) ∈ (𝑘𝐹(𝑔‘𝑘)) ∧ 𝐴 ∈ ℕ) → (𝑔‘(𝐴 + 1)) ∈ (𝐴𝐹(𝑔‘𝐴))) |
8 | 1, 7 | sylan 579 | . . . . . 6 ⊢ ((𝜑 ∧ 𝐴 ∈ ℕ) → (𝑔‘(𝐴 + 1)) ∈ (𝐴𝐹(𝑔‘𝐴))) |
9 | bcthlem.9 | . . . . . . . 8 ⊢ (𝜑 → 𝑔:ℕ⟶(𝑋 × ℝ+)) | |
10 | 9 | ffvelrnda 6943 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝐴 ∈ ℕ) → (𝑔‘𝐴) ∈ (𝑋 × ℝ+)) |
11 | bcth.2 | . . . . . . . . 9 ⊢ 𝐽 = (MetOpen‘𝐷) | |
12 | bcthlem.4 | . . . . . . . . 9 ⊢ (𝜑 → 𝐷 ∈ (CMet‘𝑋)) | |
13 | bcthlem.5 | . . . . . . . . 9 ⊢ 𝐹 = (𝑘 ∈ ℕ, 𝑧 ∈ (𝑋 × ℝ+) ↦ {〈𝑥, 𝑟〉 ∣ ((𝑥 ∈ 𝑋 ∧ 𝑟 ∈ ℝ+) ∧ (𝑟 < (1 / 𝑘) ∧ ((cls‘𝐽)‘(𝑥(ball‘𝐷)𝑟)) ⊆ (((ball‘𝐷)‘𝑧) ∖ (𝑀‘𝑘))))}) | |
14 | 11, 12, 13 | bcthlem1 24393 | . . . . . . . 8 ⊢ ((𝜑 ∧ (𝐴 ∈ ℕ ∧ (𝑔‘𝐴) ∈ (𝑋 × ℝ+))) → ((𝑔‘(𝐴 + 1)) ∈ (𝐴𝐹(𝑔‘𝐴)) ↔ ((𝑔‘(𝐴 + 1)) ∈ (𝑋 × ℝ+) ∧ (2nd ‘(𝑔‘(𝐴 + 1))) < (1 / 𝐴) ∧ ((cls‘𝐽)‘((ball‘𝐷)‘(𝑔‘(𝐴 + 1)))) ⊆ (((ball‘𝐷)‘(𝑔‘𝐴)) ∖ (𝑀‘𝐴))))) |
15 | 14 | expr 456 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝐴 ∈ ℕ) → ((𝑔‘𝐴) ∈ (𝑋 × ℝ+) → ((𝑔‘(𝐴 + 1)) ∈ (𝐴𝐹(𝑔‘𝐴)) ↔ ((𝑔‘(𝐴 + 1)) ∈ (𝑋 × ℝ+) ∧ (2nd ‘(𝑔‘(𝐴 + 1))) < (1 / 𝐴) ∧ ((cls‘𝐽)‘((ball‘𝐷)‘(𝑔‘(𝐴 + 1)))) ⊆ (((ball‘𝐷)‘(𝑔‘𝐴)) ∖ (𝑀‘𝐴)))))) |
16 | 10, 15 | mpd 15 | . . . . . 6 ⊢ ((𝜑 ∧ 𝐴 ∈ ℕ) → ((𝑔‘(𝐴 + 1)) ∈ (𝐴𝐹(𝑔‘𝐴)) ↔ ((𝑔‘(𝐴 + 1)) ∈ (𝑋 × ℝ+) ∧ (2nd ‘(𝑔‘(𝐴 + 1))) < (1 / 𝐴) ∧ ((cls‘𝐽)‘((ball‘𝐷)‘(𝑔‘(𝐴 + 1)))) ⊆ (((ball‘𝐷)‘(𝑔‘𝐴)) ∖ (𝑀‘𝐴))))) |
17 | 8, 16 | mpbid 231 | . . . . 5 ⊢ ((𝜑 ∧ 𝐴 ∈ ℕ) → ((𝑔‘(𝐴 + 1)) ∈ (𝑋 × ℝ+) ∧ (2nd ‘(𝑔‘(𝐴 + 1))) < (1 / 𝐴) ∧ ((cls‘𝐽)‘((ball‘𝐷)‘(𝑔‘(𝐴 + 1)))) ⊆ (((ball‘𝐷)‘(𝑔‘𝐴)) ∖ (𝑀‘𝐴)))) |
18 | 17 | simp3d 1142 | . . . 4 ⊢ ((𝜑 ∧ 𝐴 ∈ ℕ) → ((cls‘𝐽)‘((ball‘𝐷)‘(𝑔‘(𝐴 + 1)))) ⊆ (((ball‘𝐷)‘(𝑔‘𝐴)) ∖ (𝑀‘𝐴))) |
19 | 18 | difss2d 4065 | . . 3 ⊢ ((𝜑 ∧ 𝐴 ∈ ℕ) → ((cls‘𝐽)‘((ball‘𝐷)‘(𝑔‘(𝐴 + 1)))) ⊆ ((ball‘𝐷)‘(𝑔‘𝐴))) |
20 | 19 | 3adant2 1129 | . 2 ⊢ ((𝜑 ∧ (1st ∘ 𝑔)(⇝𝑡‘𝐽)𝑥 ∧ 𝐴 ∈ ℕ) → ((cls‘𝐽)‘((ball‘𝐷)‘(𝑔‘(𝐴 + 1)))) ⊆ ((ball‘𝐷)‘(𝑔‘𝐴))) |
21 | peano2nn 11915 | . . 3 ⊢ (𝐴 ∈ ℕ → (𝐴 + 1) ∈ ℕ) | |
22 | cmetmet 24355 | . . . . 5 ⊢ (𝐷 ∈ (CMet‘𝑋) → 𝐷 ∈ (Met‘𝑋)) | |
23 | metxmet 23395 | . . . . 5 ⊢ (𝐷 ∈ (Met‘𝑋) → 𝐷 ∈ (∞Met‘𝑋)) | |
24 | 12, 22, 23 | 3syl 18 | . . . 4 ⊢ (𝜑 → 𝐷 ∈ (∞Met‘𝑋)) |
25 | bcthlem.6 | . . . . 5 ⊢ (𝜑 → 𝑀:ℕ⟶(Clsd‘𝐽)) | |
26 | bcthlem.7 | . . . . 5 ⊢ (𝜑 → 𝑅 ∈ ℝ+) | |
27 | bcthlem.8 | . . . . 5 ⊢ (𝜑 → 𝐶 ∈ 𝑋) | |
28 | bcthlem.10 | . . . . 5 ⊢ (𝜑 → (𝑔‘1) = 〈𝐶, 𝑅〉) | |
29 | 11, 12, 13, 25, 26, 27, 9, 28, 1 | bcthlem2 24394 | . . . 4 ⊢ (𝜑 → ∀𝑛 ∈ ℕ ((ball‘𝐷)‘(𝑔‘(𝑛 + 1))) ⊆ ((ball‘𝐷)‘(𝑔‘𝑛))) |
30 | 24, 9, 29, 11 | caublcls 24378 | . . 3 ⊢ ((𝜑 ∧ (1st ∘ 𝑔)(⇝𝑡‘𝐽)𝑥 ∧ (𝐴 + 1) ∈ ℕ) → 𝑥 ∈ ((cls‘𝐽)‘((ball‘𝐷)‘(𝑔‘(𝐴 + 1))))) |
31 | 21, 30 | syl3an3 1163 | . 2 ⊢ ((𝜑 ∧ (1st ∘ 𝑔)(⇝𝑡‘𝐽)𝑥 ∧ 𝐴 ∈ ℕ) → 𝑥 ∈ ((cls‘𝐽)‘((ball‘𝐷)‘(𝑔‘(𝐴 + 1))))) |
32 | 20, 31 | sseldd 3918 | 1 ⊢ ((𝜑 ∧ (1st ∘ 𝑔)(⇝𝑡‘𝐽)𝑥 ∧ 𝐴 ∈ ℕ) → 𝑥 ∈ ((ball‘𝐷)‘(𝑔‘𝐴))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∧ w3a 1085 = wceq 1539 ∈ wcel 2108 ∀wral 3063 ∖ cdif 3880 ⊆ wss 3883 〈cop 4564 class class class wbr 5070 {copab 5132 × cxp 5578 ∘ ccom 5584 ⟶wf 6414 ‘cfv 6418 (class class class)co 7255 ∈ cmpo 7257 1st c1st 7802 2nd c2nd 7803 1c1 10803 + caddc 10805 < clt 10940 / cdiv 11562 ℕcn 11903 ℝ+crp 12659 ∞Metcxmet 20495 Metcmet 20496 ballcbl 20497 MetOpencmopn 20500 Clsdccld 22075 clsccl 22077 ⇝𝑡clm 22285 CMetccmet 24323 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 ax-pre-sup 10880 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-iin 4924 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-1st 7804 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-er 8456 df-map 8575 df-pm 8576 df-en 8692 df-dom 8693 df-sdom 8694 df-sup 9131 df-inf 9132 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-div 11563 df-nn 11904 df-2 11966 df-n0 12164 df-z 12250 df-uz 12512 df-q 12618 df-rp 12660 df-xneg 12777 df-xadd 12778 df-xmul 12779 df-topgen 17071 df-psmet 20502 df-xmet 20503 df-met 20504 df-bl 20505 df-mopn 20506 df-top 21951 df-topon 21968 df-bases 22004 df-cld 22078 df-ntr 22079 df-cls 22080 df-lm 22288 df-cmet 24326 |
This theorem is referenced by: bcthlem4 24396 |
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