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Mirrors > Home > MPE Home > Th. List > blcls | Structured version Visualization version GIF version |
Description: The closure of an open ball in a metric space is contained in the corresponding closed ball. (Equality need not hold; for example, with the discrete metric, the closed ball of radius 1 is the whole space, but the open ball of radius 1 is just a point, whose closure is also a point.) (Contributed by Mario Carneiro, 31-Dec-2013.) |
Ref | Expression |
---|---|
mopni.1 | ⊢ 𝐽 = (MetOpen‘𝐷) |
blcld.3 | ⊢ 𝑆 = {𝑧 ∈ 𝑋 ∣ (𝑃𝐷𝑧) ≤ 𝑅} |
Ref | Expression |
---|---|
blcls | ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑅 ∈ ℝ*) → ((cls‘𝐽)‘(𝑃(ball‘𝐷)𝑅)) ⊆ 𝑆) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | mopni.1 | . . 3 ⊢ 𝐽 = (MetOpen‘𝐷) | |
2 | blcld.3 | . . 3 ⊢ 𝑆 = {𝑧 ∈ 𝑋 ∣ (𝑃𝐷𝑧) ≤ 𝑅} | |
3 | 1, 2 | blcld 23567 | . 2 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑅 ∈ ℝ*) → 𝑆 ∈ (Clsd‘𝐽)) |
4 | blssm 23479 | . . . 4 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑅 ∈ ℝ*) → (𝑃(ball‘𝐷)𝑅) ⊆ 𝑋) | |
5 | elbl 23449 | . . . . . 6 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑅 ∈ ℝ*) → (𝑧 ∈ (𝑃(ball‘𝐷)𝑅) ↔ (𝑧 ∈ 𝑋 ∧ (𝑃𝐷𝑧) < 𝑅))) | |
6 | xmetcl 23392 | . . . . . . . . . 10 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑧 ∈ 𝑋) → (𝑃𝐷𝑧) ∈ ℝ*) | |
7 | 6 | 3expa 1116 | . . . . . . . . 9 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ 𝑧 ∈ 𝑋) → (𝑃𝐷𝑧) ∈ ℝ*) |
8 | 7 | 3adantl3 1166 | . . . . . . . 8 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑅 ∈ ℝ*) ∧ 𝑧 ∈ 𝑋) → (𝑃𝐷𝑧) ∈ ℝ*) |
9 | simpl3 1191 | . . . . . . . 8 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑅 ∈ ℝ*) ∧ 𝑧 ∈ 𝑋) → 𝑅 ∈ ℝ*) | |
10 | xrltle 12812 | . . . . . . . 8 ⊢ (((𝑃𝐷𝑧) ∈ ℝ* ∧ 𝑅 ∈ ℝ*) → ((𝑃𝐷𝑧) < 𝑅 → (𝑃𝐷𝑧) ≤ 𝑅)) | |
11 | 8, 9, 10 | syl2anc 583 | . . . . . . 7 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑅 ∈ ℝ*) ∧ 𝑧 ∈ 𝑋) → ((𝑃𝐷𝑧) < 𝑅 → (𝑃𝐷𝑧) ≤ 𝑅)) |
12 | 11 | expimpd 453 | . . . . . 6 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑅 ∈ ℝ*) → ((𝑧 ∈ 𝑋 ∧ (𝑃𝐷𝑧) < 𝑅) → (𝑃𝐷𝑧) ≤ 𝑅)) |
13 | 5, 12 | sylbid 239 | . . . . 5 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑅 ∈ ℝ*) → (𝑧 ∈ (𝑃(ball‘𝐷)𝑅) → (𝑃𝐷𝑧) ≤ 𝑅)) |
14 | 13 | ralrimiv 3106 | . . . 4 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑅 ∈ ℝ*) → ∀𝑧 ∈ (𝑃(ball‘𝐷)𝑅)(𝑃𝐷𝑧) ≤ 𝑅) |
15 | ssrab 4002 | . . . 4 ⊢ ((𝑃(ball‘𝐷)𝑅) ⊆ {𝑧 ∈ 𝑋 ∣ (𝑃𝐷𝑧) ≤ 𝑅} ↔ ((𝑃(ball‘𝐷)𝑅) ⊆ 𝑋 ∧ ∀𝑧 ∈ (𝑃(ball‘𝐷)𝑅)(𝑃𝐷𝑧) ≤ 𝑅)) | |
16 | 4, 14, 15 | sylanbrc 582 | . . 3 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑅 ∈ ℝ*) → (𝑃(ball‘𝐷)𝑅) ⊆ {𝑧 ∈ 𝑋 ∣ (𝑃𝐷𝑧) ≤ 𝑅}) |
17 | 16, 2 | sseqtrrdi 3968 | . 2 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑅 ∈ ℝ*) → (𝑃(ball‘𝐷)𝑅) ⊆ 𝑆) |
18 | eqid 2738 | . . 3 ⊢ ∪ 𝐽 = ∪ 𝐽 | |
19 | 18 | clsss2 22131 | . 2 ⊢ ((𝑆 ∈ (Clsd‘𝐽) ∧ (𝑃(ball‘𝐷)𝑅) ⊆ 𝑆) → ((cls‘𝐽)‘(𝑃(ball‘𝐷)𝑅)) ⊆ 𝑆) |
20 | 3, 17, 19 | syl2anc 583 | 1 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑅 ∈ ℝ*) → ((cls‘𝐽)‘(𝑃(ball‘𝐷)𝑅)) ⊆ 𝑆) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1085 = wceq 1539 ∈ wcel 2108 ∀wral 3063 {crab 3067 ⊆ wss 3883 ∪ cuni 4836 class class class wbr 5070 ‘cfv 6418 (class class class)co 7255 ℝ*cxr 10939 < clt 10940 ≤ cle 10941 ∞Metcxmet 20495 ballcbl 20497 MetOpencmopn 20500 Clsdccld 22075 clsccl 22077 |
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-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-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-bl 20505 df-mopn 20506 df-top 21951 df-topon 21968 df-bases 22004 df-cld 22078 df-cls 22080 |
This theorem is referenced by: blsscls 23569 cnllycmp 24025 cncmet 24391 |
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