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Mirrors > Home > MPE Home > Th. List > blpnfctr | Structured version Visualization version GIF version |
Description: The infinity ball in an extended metric acts like an ultrametric ball in that every point in the ball is also its center. (Contributed by Mario Carneiro, 21-Aug-2015.) |
Ref | Expression |
---|---|
blpnfctr | ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) → (𝑃(ball‘𝐷)+∞) = (𝐴(ball‘𝐷)+∞)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2739 | . . . . 5 ⊢ (◡𝐷 “ ℝ) = (◡𝐷 “ ℝ) | |
2 | 1 | xmeter 23567 | . . . 4 ⊢ (𝐷 ∈ (∞Met‘𝑋) → (◡𝐷 “ ℝ) Er 𝑋) |
3 | 2 | 3ad2ant1 1131 | . . 3 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) → (◡𝐷 “ ℝ) Er 𝑋) |
4 | simp3 1136 | . . . . 5 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) → 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) | |
5 | 1 | xmetec 23568 | . . . . . 6 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) → [𝑃](◡𝐷 “ ℝ) = (𝑃(ball‘𝐷)+∞)) |
6 | 5 | 3adant3 1130 | . . . . 5 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) → [𝑃](◡𝐷 “ ℝ) = (𝑃(ball‘𝐷)+∞)) |
7 | 4, 6 | eleqtrrd 2843 | . . . 4 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) → 𝐴 ∈ [𝑃](◡𝐷 “ ℝ)) |
8 | elecg 8515 | . . . . . 6 ⊢ ((𝐴 ∈ (𝑃(ball‘𝐷)+∞) ∧ 𝑃 ∈ 𝑋) → (𝐴 ∈ [𝑃](◡𝐷 “ ℝ) ↔ 𝑃(◡𝐷 “ ℝ)𝐴)) | |
9 | 8 | ancoms 458 | . . . . 5 ⊢ ((𝑃 ∈ 𝑋 ∧ 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) → (𝐴 ∈ [𝑃](◡𝐷 “ ℝ) ↔ 𝑃(◡𝐷 “ ℝ)𝐴)) |
10 | 9 | 3adant1 1128 | . . . 4 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) → (𝐴 ∈ [𝑃](◡𝐷 “ ℝ) ↔ 𝑃(◡𝐷 “ ℝ)𝐴)) |
11 | 7, 10 | mpbid 231 | . . 3 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) → 𝑃(◡𝐷 “ ℝ)𝐴) |
12 | 3, 11 | erthi 8523 | . 2 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) → [𝑃](◡𝐷 “ ℝ) = [𝐴](◡𝐷 “ ℝ)) |
13 | pnfxr 11013 | . . . . . 6 ⊢ +∞ ∈ ℝ* | |
14 | blssm 23552 | . . . . . 6 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ +∞ ∈ ℝ*) → (𝑃(ball‘𝐷)+∞) ⊆ 𝑋) | |
15 | 13, 14 | mp3an3 1448 | . . . . 5 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) → (𝑃(ball‘𝐷)+∞) ⊆ 𝑋) |
16 | 15 | sselda 3925 | . . . 4 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) → 𝐴 ∈ 𝑋) |
17 | 1 | xmetec 23568 | . . . . 5 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐴 ∈ 𝑋) → [𝐴](◡𝐷 “ ℝ) = (𝐴(ball‘𝐷)+∞)) |
18 | 17 | adantlr 711 | . . . 4 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ 𝐴 ∈ 𝑋) → [𝐴](◡𝐷 “ ℝ) = (𝐴(ball‘𝐷)+∞)) |
19 | 16, 18 | syldan 590 | . . 3 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) → [𝐴](◡𝐷 “ ℝ) = (𝐴(ball‘𝐷)+∞)) |
20 | 19 | 3impa 1108 | . 2 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) → [𝐴](◡𝐷 “ ℝ) = (𝐴(ball‘𝐷)+∞)) |
21 | 12, 6, 20 | 3eqtr3d 2787 | 1 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) → (𝑃(ball‘𝐷)+∞) = (𝐴(ball‘𝐷)+∞)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∧ w3a 1085 = wceq 1541 ∈ wcel 2109 ⊆ wss 3891 class class class wbr 5078 ◡ccnv 5587 “ cima 5591 ‘cfv 6430 (class class class)co 7268 Er wer 8469 [cec 8470 ℝcr 10854 +∞cpnf 10990 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 ax-1cn 10913 ax-icn 10914 ax-addcl 10915 ax-addrcl 10916 ax-mulcl 10917 ax-mulrcl 10918 ax-mulcom 10919 ax-addass 10920 ax-mulass 10921 ax-distr 10922 ax-i2m1 10923 ax-1ne0 10924 ax-1rid 10925 ax-rnegex 10926 ax-rrecex 10927 ax-cnre 10928 ax-pre-lttri 10929 ax-pre-lttrn 10930 ax-pre-ltadd 10931 ax-pre-mulgt0 10932 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 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-nel 3051 df-ral 3070 df-rex 3071 df-reu 3072 df-rmo 3073 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-po 5502 df-so 5503 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-f1 6435 df-fo 6436 df-f1o 6437 df-fv 6438 df-riota 7225 df-ov 7271 df-oprab 7272 df-mpo 7273 df-1st 7817 df-2nd 7818 df-er 8472 df-ec 8474 df-map 8591 df-en 8708 df-dom 8709 df-sdom 8710 df-pnf 10995 df-mnf 10996 df-xr 10997 df-ltxr 10998 df-le 10999 df-sub 11190 df-neg 11191 df-div 11616 df-2 12019 df-rp 12713 df-xneg 12830 df-xadd 12831 df-xmul 12832 df-psmet 20570 df-xmet 20571 df-bl 20573 |
This theorem is referenced by: metdstri 23995 |
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