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Mirrors > Home > MPE Home > Th. List > blpnf | Structured version Visualization version GIF version |
Description: The infinity ball in a standard metric is just the whole space. (Contributed by Mario Carneiro, 23-Aug-2015.) |
Ref | Expression |
---|---|
blpnf | ⊢ ((𝐷 ∈ (Met‘𝑋) ∧ 𝑃 ∈ 𝑋) → (𝑃(ball‘𝐷)+∞) = 𝑋) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | metxmet 23050 | . . . 4 ⊢ (𝐷 ∈ (Met‘𝑋) → 𝐷 ∈ (∞Met‘𝑋)) | |
2 | xblpnf 23112 | . . . 4 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) → (𝑥 ∈ (𝑃(ball‘𝐷)+∞) ↔ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) ∈ ℝ))) | |
3 | 1, 2 | sylan 583 | . . 3 ⊢ ((𝐷 ∈ (Met‘𝑋) ∧ 𝑃 ∈ 𝑋) → (𝑥 ∈ (𝑃(ball‘𝐷)+∞) ↔ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) ∈ ℝ))) |
4 | metcl 23048 | . . . . 5 ⊢ ((𝐷 ∈ (Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑥 ∈ 𝑋) → (𝑃𝐷𝑥) ∈ ℝ) | |
5 | 4 | 3expia 1118 | . . . 4 ⊢ ((𝐷 ∈ (Met‘𝑋) ∧ 𝑃 ∈ 𝑋) → (𝑥 ∈ 𝑋 → (𝑃𝐷𝑥) ∈ ℝ)) |
6 | 5 | pm4.71d 565 | . . 3 ⊢ ((𝐷 ∈ (Met‘𝑋) ∧ 𝑃 ∈ 𝑋) → (𝑥 ∈ 𝑋 ↔ (𝑥 ∈ 𝑋 ∧ (𝑃𝐷𝑥) ∈ ℝ))) |
7 | 3, 6 | bitr4d 285 | . 2 ⊢ ((𝐷 ∈ (Met‘𝑋) ∧ 𝑃 ∈ 𝑋) → (𝑥 ∈ (𝑃(ball‘𝐷)+∞) ↔ 𝑥 ∈ 𝑋)) |
8 | 7 | eqrdv 2756 | 1 ⊢ ((𝐷 ∈ (Met‘𝑋) ∧ 𝑃 ∈ 𝑋) → (𝑃(ball‘𝐷)+∞) = 𝑋) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 209 ∧ wa 399 = wceq 1538 ∈ wcel 2111 ‘cfv 6340 (class class class)co 7156 ℝcr 10587 +∞cpnf 10723 ∞Metcxmet 20165 Metcmet 20166 ballcbl 20167 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2729 ax-sep 5173 ax-nul 5180 ax-pow 5238 ax-pr 5302 ax-un 7465 ax-cnex 10644 ax-resscn 10645 ax-1cn 10646 ax-icn 10647 ax-addcl 10648 ax-addrcl 10649 ax-mulcl 10650 ax-mulrcl 10651 ax-mulcom 10652 ax-addass 10653 ax-mulass 10654 ax-distr 10655 ax-i2m1 10656 ax-1ne0 10657 ax-1rid 10658 ax-rnegex 10659 ax-rrecex 10660 ax-cnre 10661 ax-pre-lttri 10662 ax-pre-lttrn 10663 ax-pre-ltadd 10664 ax-pre-mulgt0 10665 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3or 1085 df-3an 1086 df-tru 1541 df-fal 1551 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2557 df-eu 2588 df-clab 2736 df-cleq 2750 df-clel 2830 df-nfc 2901 df-ne 2952 df-nel 3056 df-ral 3075 df-rex 3076 df-reu 3077 df-rmo 3078 df-rab 3079 df-v 3411 df-sbc 3699 df-csb 3808 df-dif 3863 df-un 3865 df-in 3867 df-ss 3877 df-nul 4228 df-if 4424 df-pw 4499 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4802 df-iun 4888 df-br 5037 df-opab 5099 df-mpt 5117 df-id 5434 df-po 5447 df-so 5448 df-xp 5534 df-rel 5535 df-cnv 5536 df-co 5537 df-dm 5538 df-rn 5539 df-res 5540 df-ima 5541 df-iota 6299 df-fun 6342 df-fn 6343 df-f 6344 df-f1 6345 df-fo 6346 df-f1o 6347 df-fv 6348 df-riota 7114 df-ov 7159 df-oprab 7160 df-mpo 7161 df-1st 7699 df-2nd 7700 df-er 8305 df-map 8424 df-en 8541 df-dom 8542 df-sdom 8543 df-pnf 10728 df-mnf 10729 df-xr 10730 df-ltxr 10731 df-le 10732 df-sub 10923 df-neg 10924 df-div 11349 df-2 11750 df-rp 12444 df-xneg 12561 df-xadd 12562 df-xmul 12563 df-psmet 20172 df-xmet 20173 df-met 20174 df-bl 20175 |
This theorem is referenced by: blssioo 23510 sblpnf 41432 |
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