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Mirrors > Home > ILE Home > Th. List > blssex | GIF version |
Description: Two ways to express the existence of a ball subset. (Contributed by NM, 5-May-2007.) (Revised by Mario Carneiro, 12-Nov-2013.) |
Ref | Expression |
---|---|
blssex | ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) → (∃𝑥 ∈ ran (ball‘𝐷)(𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴) ↔ ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | blss 13078 | . . . . . . 7 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑥 ∈ ran (ball‘𝐷) ∧ 𝑃 ∈ 𝑥) → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝑥) | |
2 | sstr 3150 | . . . . . . . . 9 ⊢ (((𝑃(ball‘𝐷)𝑟) ⊆ 𝑥 ∧ 𝑥 ⊆ 𝐴) → (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴) | |
3 | 2 | expcom 115 | . . . . . . . 8 ⊢ (𝑥 ⊆ 𝐴 → ((𝑃(ball‘𝐷)𝑟) ⊆ 𝑥 → (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) |
4 | 3 | reximdv 2567 | . . . . . . 7 ⊢ (𝑥 ⊆ 𝐴 → (∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝑥 → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) |
5 | 1, 4 | syl5com 29 | . . . . . 6 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑥 ∈ ran (ball‘𝐷) ∧ 𝑃 ∈ 𝑥) → (𝑥 ⊆ 𝐴 → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) |
6 | 5 | 3expa 1193 | . . . . 5 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑥 ∈ ran (ball‘𝐷)) ∧ 𝑃 ∈ 𝑥) → (𝑥 ⊆ 𝐴 → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) |
7 | 6 | expimpd 361 | . . . 4 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑥 ∈ ran (ball‘𝐷)) → ((𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴) → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) |
8 | 7 | adantlr 469 | . . 3 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ 𝑥 ∈ ran (ball‘𝐷)) → ((𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴) → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) |
9 | 8 | rexlimdva 2583 | . 2 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) → (∃𝑥 ∈ ran (ball‘𝐷)(𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴) → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) |
10 | simpll 519 | . . . . 5 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → 𝐷 ∈ (∞Met‘𝑋)) | |
11 | simplr 520 | . . . . 5 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → 𝑃 ∈ 𝑋) | |
12 | rpxr 9597 | . . . . . 6 ⊢ (𝑟 ∈ ℝ+ → 𝑟 ∈ ℝ*) | |
13 | 12 | ad2antrl 482 | . . . . 5 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → 𝑟 ∈ ℝ*) |
14 | blelrn 13070 | . . . . 5 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑟 ∈ ℝ*) → (𝑃(ball‘𝐷)𝑟) ∈ ran (ball‘𝐷)) | |
15 | 10, 11, 13, 14 | syl3anc 1228 | . . . 4 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → (𝑃(ball‘𝐷)𝑟) ∈ ran (ball‘𝐷)) |
16 | simprl 521 | . . . . 5 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → 𝑟 ∈ ℝ+) | |
17 | blcntr 13066 | . . . . 5 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑟 ∈ ℝ+) → 𝑃 ∈ (𝑃(ball‘𝐷)𝑟)) | |
18 | 10, 11, 16, 17 | syl3anc 1228 | . . . 4 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → 𝑃 ∈ (𝑃(ball‘𝐷)𝑟)) |
19 | simprr 522 | . . . 4 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴) | |
20 | eleq2 2230 | . . . . . 6 ⊢ (𝑥 = (𝑃(ball‘𝐷)𝑟) → (𝑃 ∈ 𝑥 ↔ 𝑃 ∈ (𝑃(ball‘𝐷)𝑟))) | |
21 | sseq1 3165 | . . . . . 6 ⊢ (𝑥 = (𝑃(ball‘𝐷)𝑟) → (𝑥 ⊆ 𝐴 ↔ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) | |
22 | 20, 21 | anbi12d 465 | . . . . 5 ⊢ (𝑥 = (𝑃(ball‘𝐷)𝑟) → ((𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴) ↔ (𝑃 ∈ (𝑃(ball‘𝐷)𝑟) ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴))) |
23 | 22 | rspcev 2830 | . . . 4 ⊢ (((𝑃(ball‘𝐷)𝑟) ∈ ran (ball‘𝐷) ∧ (𝑃 ∈ (𝑃(ball‘𝐷)𝑟) ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → ∃𝑥 ∈ ran (ball‘𝐷)(𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴)) |
24 | 15, 18, 19, 23 | syl12anc 1226 | . . 3 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → ∃𝑥 ∈ ran (ball‘𝐷)(𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴)) |
25 | 24 | rexlimdvaa 2584 | . 2 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) → (∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴 → ∃𝑥 ∈ ran (ball‘𝐷)(𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴))) |
26 | 9, 25 | impbid 128 | 1 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) → (∃𝑥 ∈ ran (ball‘𝐷)(𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴) ↔ ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 ∧ w3a 968 = wceq 1343 ∈ wcel 2136 ∃wrex 2445 ⊆ wss 3116 ran crn 4605 ‘cfv 5188 (class class class)co 5842 ℝ*cxr 7932 ℝ+crp 9589 ∞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 ax-pre-mulext 7871 ax-arch 7872 |
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-rmo 2452 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-int 3825 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-map 6616 df-pnf 7935 df-mnf 7936 df-xr 7937 df-ltxr 7938 df-le 7939 df-sub 8071 df-neg 8072 df-reap 8473 df-ap 8480 df-div 8569 df-inn 8858 df-2 8916 df-n0 9115 df-z 9192 df-uz 9467 df-q 9558 df-rp 9590 df-xneg 9708 df-xadd 9709 df-psmet 12637 df-xmet 12638 df-bl 12640 |
This theorem is referenced by: blbas 13083 elmopn2 13099 mopni2 13133 metss 13144 tgioo 13196 |
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