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Mirrors > Home > ILE Home > Th. List > blssec | GIF version |
Description: A ball centered at 𝑃 is contained in the set of points finitely separated from 𝑃. This is just an application of ssbl 13076 to the infinity ball. (Contributed by Mario Carneiro, 24-Aug-2015.) |
Ref | Expression |
---|---|
xmeter.1 | ⊢ ∼ = (◡𝐷 “ ℝ) |
Ref | Expression |
---|---|
blssec | ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑆 ∈ ℝ*) → (𝑃(ball‘𝐷)𝑆) ⊆ [𝑃] ∼ ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pnfge 9725 | . . . . 5 ⊢ (𝑆 ∈ ℝ* → 𝑆 ≤ +∞) | |
2 | 1 | adantl 275 | . . . 4 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ 𝑆 ∈ ℝ*) → 𝑆 ≤ +∞) |
3 | pnfxr 7951 | . . . . 5 ⊢ +∞ ∈ ℝ* | |
4 | ssbl 13076 | . . . . . 6 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑆 ∈ ℝ* ∧ +∞ ∈ ℝ*) ∧ 𝑆 ≤ +∞) → (𝑃(ball‘𝐷)𝑆) ⊆ (𝑃(ball‘𝐷)+∞)) | |
5 | 4 | 3expia 1195 | . . . . 5 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑆 ∈ ℝ* ∧ +∞ ∈ ℝ*)) → (𝑆 ≤ +∞ → (𝑃(ball‘𝐷)𝑆) ⊆ (𝑃(ball‘𝐷)+∞))) |
6 | 3, 5 | mpanr2 435 | . . . 4 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ 𝑆 ∈ ℝ*) → (𝑆 ≤ +∞ → (𝑃(ball‘𝐷)𝑆) ⊆ (𝑃(ball‘𝐷)+∞))) |
7 | 2, 6 | mpd 13 | . . 3 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ 𝑆 ∈ ℝ*) → (𝑃(ball‘𝐷)𝑆) ⊆ (𝑃(ball‘𝐷)+∞)) |
8 | 7 | 3impa 1184 | . 2 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑆 ∈ ℝ*) → (𝑃(ball‘𝐷)𝑆) ⊆ (𝑃(ball‘𝐷)+∞)) |
9 | xmeter.1 | . . . 4 ⊢ ∼ = (◡𝐷 “ ℝ) | |
10 | 9 | xmetec 13087 | . . 3 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) → [𝑃] ∼ = (𝑃(ball‘𝐷)+∞)) |
11 | 10 | 3adant3 1007 | . 2 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑆 ∈ ℝ*) → [𝑃] ∼ = (𝑃(ball‘𝐷)+∞)) |
12 | 8, 11 | sseqtrrd 3181 | 1 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑆 ∈ ℝ*) → (𝑃(ball‘𝐷)𝑆) ⊆ [𝑃] ∼ ) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ∧ w3a 968 = wceq 1343 ∈ wcel 2136 ⊆ wss 3116 class class class wbr 3982 ◡ccnv 4603 “ cima 4607 ‘cfv 5188 (class class class)co 5842 [cec 6499 ℝcr 7752 +∞cpnf 7930 ℝ*cxr 7932 ≤ cle 7934 ∞Metcxmet 12630 ballcbl 12632 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-13 2138 ax-14 2139 ax-ext 2147 ax-sep 4100 ax-pow 4153 ax-pr 4187 ax-un 4411 ax-setind 4514 ax-cnex 7844 ax-resscn 7845 ax-1cn 7846 ax-1re 7847 ax-icn 7848 ax-addcl 7849 ax-addrcl 7850 ax-mulcl 7851 ax-mulrcl 7852 ax-addcom 7853 ax-mulcom 7854 ax-addass 7855 ax-mulass 7856 ax-distr 7857 ax-i2m1 7858 ax-0lt1 7859 ax-1rid 7860 ax-0id 7861 ax-rnegex 7862 ax-precex 7863 ax-cnre 7864 ax-pre-ltirr 7865 ax-pre-ltwlin 7866 ax-pre-lttrn 7867 ax-pre-apti 7868 ax-pre-ltadd 7869 ax-pre-mulgt0 7870 |
This theorem depends on definitions: df-bi 116 df-stab 821 df-dc 825 df-3or 969 df-3an 970 df-tru 1346 df-fal 1349 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ne 2337 df-nel 2432 df-ral 2449 df-rex 2450 df-reu 2451 df-rab 2453 df-v 2728 df-sbc 2952 df-csb 3046 df-dif 3118 df-un 3120 df-in 3122 df-ss 3129 df-if 3521 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-uni 3790 df-iun 3868 df-br 3983 df-opab 4044 df-mpt 4045 df-id 4271 df-po 4274 df-iso 4275 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-rn 4615 df-res 4616 df-ima 4617 df-iota 5153 df-fun 5190 df-fn 5191 df-f 5192 df-fv 5196 df-riota 5798 df-ov 5845 df-oprab 5846 df-mpo 5847 df-1st 6108 df-2nd 6109 df-ec 6503 df-map 6616 df-pnf 7935 df-mnf 7936 df-xr 7937 df-ltxr 7938 df-le 7939 df-sub 8071 df-neg 8072 df-2 8916 df-xneg 9708 df-xadd 9709 df-psmet 12637 df-xmet 12638 df-bl 12640 |
This theorem is referenced by: xmetresbl 13090 |
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