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Mirrors > Home > MPE Home > Th. List > blssm | Structured version Visualization version GIF version |
Description: A ball is a subset of the base set of a metric space. (Contributed by NM, 31-Aug-2006.) (Revised by Mario Carneiro, 12-Nov-2013.) |
Ref | Expression |
---|---|
blssm | ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑅 ∈ ℝ*) → (𝑃(ball‘𝐷)𝑅) ⊆ 𝑋) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | blf 23541 | . . 3 ⊢ (𝐷 ∈ (∞Met‘𝑋) → (ball‘𝐷):(𝑋 × ℝ*)⟶𝒫 𝑋) | |
2 | fovrn 7433 | . . 3 ⊢ (((ball‘𝐷):(𝑋 × ℝ*)⟶𝒫 𝑋 ∧ 𝑃 ∈ 𝑋 ∧ 𝑅 ∈ ℝ*) → (𝑃(ball‘𝐷)𝑅) ∈ 𝒫 𝑋) | |
3 | 1, 2 | syl3an1 1161 | . 2 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑅 ∈ ℝ*) → (𝑃(ball‘𝐷)𝑅) ∈ 𝒫 𝑋) |
4 | 3 | elpwid 4549 | 1 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑅 ∈ ℝ*) → (𝑃(ball‘𝐷)𝑅) ⊆ 𝑋) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ w3a 1085 ∈ wcel 2109 ⊆ wss 3891 𝒫 cpw 4538 × cxp 5586 ⟶wf 6426 ‘cfv 6430 (class class class)co 7268 ℝ*cxr 10992 ∞Metcxmet 20563 ballcbl 20565 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1801 ax-4 1815 ax-5 1916 ax-6 1974 ax-7 2014 ax-8 2111 ax-9 2119 ax-10 2140 ax-11 2157 ax-12 2174 ax-ext 2710 ax-sep 5226 ax-nul 5233 ax-pow 5291 ax-pr 5355 ax-un 7579 ax-cnex 10911 ax-resscn 10912 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3an 1087 df-tru 1544 df-fal 1554 df-ex 1786 df-nf 1790 df-sb 2071 df-mo 2541 df-eu 2570 df-clab 2717 df-cleq 2731 df-clel 2817 df-nfc 2890 df-ne 2945 df-ral 3070 df-rex 3071 df-rab 3074 df-v 3432 df-sbc 3720 df-csb 3837 df-dif 3894 df-un 3896 df-in 3898 df-ss 3908 df-nul 4262 df-if 4465 df-pw 4540 df-sn 4567 df-pr 4569 df-op 4573 df-uni 4845 df-iun 4931 df-br 5079 df-opab 5141 df-mpt 5162 df-id 5488 df-xp 5594 df-rel 5595 df-cnv 5596 df-co 5597 df-dm 5598 df-rn 5599 df-res 5600 df-ima 5601 df-iota 6388 df-fun 6432 df-fn 6433 df-f 6434 df-fv 6438 df-ov 7271 df-oprab 7272 df-mpo 7273 df-1st 7817 df-2nd 7818 df-map 8591 df-xr 10997 df-psmet 20570 df-xmet 20571 df-bl 20573 |
This theorem is referenced by: blpnfctr 23570 xmetresbl 23571 imasf1oxms 23626 prdsbl 23628 blcld 23642 blcls 23643 prdsxmslem2 23666 metcnp 23678 cnllycmp 24100 lebnumlem3 24107 lebnum 24108 cfil3i 24414 iscfil3 24418 cfilfcls 24419 iscmet3lem2 24437 equivcfil 24444 caublcls 24454 relcmpcmet 24463 cmpcmet 24464 cncmet 24467 bcthlem2 24470 bcthlem4 24472 dvlip2 25140 dv11cn 25146 pserdvlem2 25568 pserdv 25569 abelthlem3 25573 abelthlem5 25575 dvlog2lem 25788 dvlog2 25789 efopnlem2 25793 efopn 25794 logtayl 25796 efrlim 26100 blsconn 33185 sstotbnd2 35911 equivtotbnd 35915 isbnd2 35920 blbnd 35924 totbndbnd 35926 prdstotbnd 35931 prdsbnd2 35932 ismtyima 35940 heiborlem3 35950 heiborlem8 35955 |
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