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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 2736 | . . . . 5 ⊢ (◡𝐷 “ ℝ) = (◡𝐷 “ ℝ) | |
2 | 1 | xmeter 23631 | . . . 4 ⊢ (𝐷 ∈ (∞Met‘𝑋) → (◡𝐷 “ ℝ) Er 𝑋) |
3 | 2 | 3ad2ant1 1133 | . . 3 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) → (◡𝐷 “ ℝ) Er 𝑋) |
4 | simp3 1138 | . . . . 5 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) → 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) | |
5 | 1 | xmetec 23632 | . . . . . 6 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) → [𝑃](◡𝐷 “ ℝ) = (𝑃(ball‘𝐷)+∞)) |
6 | 5 | 3adant3 1132 | . . . . 5 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) → [𝑃](◡𝐷 “ ℝ) = (𝑃(ball‘𝐷)+∞)) |
7 | 4, 6 | eleqtrrd 2840 | . . . 4 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) → 𝐴 ∈ [𝑃](◡𝐷 “ ℝ)) |
8 | elecg 8572 | . . . . . 6 ⊢ ((𝐴 ∈ (𝑃(ball‘𝐷)+∞) ∧ 𝑃 ∈ 𝑋) → (𝐴 ∈ [𝑃](◡𝐷 “ ℝ) ↔ 𝑃(◡𝐷 “ ℝ)𝐴)) | |
9 | 8 | ancoms 460 | . . . . 5 ⊢ ((𝑃 ∈ 𝑋 ∧ 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) → (𝐴 ∈ [𝑃](◡𝐷 “ ℝ) ↔ 𝑃(◡𝐷 “ ℝ)𝐴)) |
10 | 9 | 3adant1 1130 | . . . 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 8580 | . 2 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) → [𝑃](◡𝐷 “ ℝ) = [𝐴](◡𝐷 “ ℝ)) |
13 | pnfxr 11075 | . . . . . 6 ⊢ +∞ ∈ ℝ* | |
14 | blssm 23616 | . . . . . 6 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ +∞ ∈ ℝ*) → (𝑃(ball‘𝐷)+∞) ⊆ 𝑋) | |
15 | 13, 14 | mp3an3 1450 | . . . . 5 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) → (𝑃(ball‘𝐷)+∞) ⊆ 𝑋) |
16 | 15 | sselda 3926 | . . . 4 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) → 𝐴 ∈ 𝑋) |
17 | 1 | xmetec 23632 | . . . . 5 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐴 ∈ 𝑋) → [𝐴](◡𝐷 “ ℝ) = (𝐴(ball‘𝐷)+∞)) |
18 | 17 | adantlr 713 | . . . 4 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ 𝐴 ∈ 𝑋) → [𝐴](◡𝐷 “ ℝ) = (𝐴(ball‘𝐷)+∞)) |
19 | 16, 18 | syldan 592 | . . 3 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) → [𝐴](◡𝐷 “ ℝ) = (𝐴(ball‘𝐷)+∞)) |
20 | 19 | 3impa 1110 | . 2 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝐴 ∈ (𝑃(ball‘𝐷)+∞)) → [𝐴](◡𝐷 “ ℝ) = (𝐴(ball‘𝐷)+∞)) |
21 | 12, 6, 20 | 3eqtr3d 2784 | 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 397 ∧ w3a 1087 = wceq 1539 ∈ wcel 2104 ⊆ wss 3892 class class class wbr 5081 ◡ccnv 5599 “ cima 5603 ‘cfv 6458 (class class class)co 7307 Er wer 8526 [cec 8527 ℝcr 10916 +∞cpnf 11052 ℝ*cxr 11054 ∞Metcxmet 20627 ballcbl 20629 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2707 ax-sep 5232 ax-nul 5239 ax-pow 5297 ax-pr 5361 ax-un 7620 ax-cnex 10973 ax-resscn 10974 ax-1cn 10975 ax-icn 10976 ax-addcl 10977 ax-addrcl 10978 ax-mulcl 10979 ax-mulrcl 10980 ax-mulcom 10981 ax-addass 10982 ax-mulass 10983 ax-distr 10984 ax-i2m1 10985 ax-1ne0 10986 ax-1rid 10987 ax-rnegex 10988 ax-rrecex 10989 ax-cnre 10990 ax-pre-lttri 10991 ax-pre-lttrn 10992 ax-pre-ltadd 10993 ax-pre-mulgt0 10994 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 846 df-3or 1088 df-3an 1089 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2887 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3285 df-reu 3286 df-rab 3287 df-v 3439 df-sbc 3722 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4566 df-pr 4568 df-op 4572 df-uni 4845 df-iun 4933 df-br 5082 df-opab 5144 df-mpt 5165 df-id 5500 df-po 5514 df-so 5515 df-xp 5606 df-rel 5607 df-cnv 5608 df-co 5609 df-dm 5610 df-rn 5611 df-res 5612 df-ima 5613 df-iota 6410 df-fun 6460 df-fn 6461 df-f 6462 df-f1 6463 df-fo 6464 df-f1o 6465 df-fv 6466 df-riota 7264 df-ov 7310 df-oprab 7311 df-mpo 7312 df-1st 7863 df-2nd 7864 df-er 8529 df-ec 8531 df-map 8648 df-en 8765 df-dom 8766 df-sdom 8767 df-pnf 11057 df-mnf 11058 df-xr 11059 df-ltxr 11060 df-le 11061 df-sub 11253 df-neg 11254 df-div 11679 df-2 12082 df-rp 12777 df-xneg 12894 df-xadd 12895 df-xmul 12896 df-psmet 20634 df-xmet 20635 df-bl 20637 |
This theorem is referenced by: metdstri 24059 |
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