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Mirrors > Home > MPE Home > Th. List > blssex | Structured version Visualization version 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 22040 | . . . . . . 7 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑥 ∈ ran (ball‘𝐷) ∧ 𝑃 ∈ 𝑥) → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝑥) | |
2 | sstr 3576 | . . . . . . . . 9 ⊢ (((𝑃(ball‘𝐷)𝑟) ⊆ 𝑥 ∧ 𝑥 ⊆ 𝐴) → (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴) | |
3 | 2 | expcom 450 | . . . . . . . 8 ⊢ (𝑥 ⊆ 𝐴 → ((𝑃(ball‘𝐷)𝑟) ⊆ 𝑥 → (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) |
4 | 3 | reximdv 2999 | . . . . . . 7 ⊢ (𝑥 ⊆ 𝐴 → (∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝑥 → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) |
5 | 1, 4 | syl5com 31 | . . . . . 6 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑥 ∈ ran (ball‘𝐷) ∧ 𝑃 ∈ 𝑥) → (𝑥 ⊆ 𝐴 → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) |
6 | 5 | 3expa 1257 | . . . . 5 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑥 ∈ ran (ball‘𝐷)) ∧ 𝑃 ∈ 𝑥) → (𝑥 ⊆ 𝐴 → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) |
7 | 6 | expimpd 627 | . . . 4 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑥 ∈ ran (ball‘𝐷)) → ((𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴) → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) |
8 | 7 | adantlr 747 | . . 3 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ 𝑥 ∈ ran (ball‘𝐷)) → ((𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴) → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) |
9 | 8 | rexlimdva 3013 | . 2 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) → (∃𝑥 ∈ ran (ball‘𝐷)(𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴) → ∃𝑟 ∈ ℝ+ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) |
10 | simpll 786 | . . . . 5 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → 𝐷 ∈ (∞Met‘𝑋)) | |
11 | simplr 788 | . . . . 5 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → 𝑃 ∈ 𝑋) | |
12 | rpxr 11716 | . . . . . 6 ⊢ (𝑟 ∈ ℝ+ → 𝑟 ∈ ℝ*) | |
13 | 12 | ad2antrl 760 | . . . . 5 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → 𝑟 ∈ ℝ*) |
14 | blelrn 22032 | . . . . 5 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑟 ∈ ℝ*) → (𝑃(ball‘𝐷)𝑟) ∈ ran (ball‘𝐷)) | |
15 | 10, 11, 13, 14 | syl3anc 1318 | . . . 4 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → (𝑃(ball‘𝐷)𝑟) ∈ ran (ball‘𝐷)) |
16 | simprl 790 | . . . . 5 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → 𝑟 ∈ ℝ+) | |
17 | blcntr 22028 | . . . . 5 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋 ∧ 𝑟 ∈ ℝ+) → 𝑃 ∈ (𝑃(ball‘𝐷)𝑟)) | |
18 | 10, 11, 16, 17 | syl3anc 1318 | . . . 4 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → 𝑃 ∈ (𝑃(ball‘𝐷)𝑟)) |
19 | simprr 792 | . . . 4 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴) | |
20 | eleq2 2677 | . . . . . 6 ⊢ (𝑥 = (𝑃(ball‘𝐷)𝑟) → (𝑃 ∈ 𝑥 ↔ 𝑃 ∈ (𝑃(ball‘𝐷)𝑟))) | |
21 | sseq1 3589 | . . . . . 6 ⊢ (𝑥 = (𝑃(ball‘𝐷)𝑟) → (𝑥 ⊆ 𝐴 ↔ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) | |
22 | 20, 21 | anbi12d 743 | . . . . 5 ⊢ (𝑥 = (𝑃(ball‘𝐷)𝑟) → ((𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴) ↔ (𝑃 ∈ (𝑃(ball‘𝐷)𝑟) ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴))) |
23 | 22 | rspcev 3282 | . . . 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 1316 | . . 3 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑃 ∈ 𝑋) ∧ (𝑟 ∈ ℝ+ ∧ (𝑃(ball‘𝐷)𝑟) ⊆ 𝐴)) → ∃𝑥 ∈ ran (ball‘𝐷)(𝑃 ∈ 𝑥 ∧ 𝑥 ⊆ 𝐴)) |
25 | 24 | rexlimdvaa 3014 | . 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 201 | 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 setvar class |
Syntax hints: → wi 4 ↔ wb 195 ∧ wa 383 ∧ w3a 1031 = wceq 1475 ∈ wcel 1977 ∃wrex 2897 ⊆ wss 3540 ran crn 5039 ‘cfv 5804 (class class class)co 6549 ℝ*cxr 9952 ℝ+crp 11708 ∞Metcxmt 19552 ballcbl 19554 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-cnex 9871 ax-resscn 9872 ax-1cn 9873 ax-icn 9874 ax-addcl 9875 ax-addrcl 9876 ax-mulcl 9877 ax-mulrcl 9878 ax-mulcom 9879 ax-addass 9880 ax-mulass 9881 ax-distr 9882 ax-i2m1 9883 ax-1ne0 9884 ax-1rid 9885 ax-rnegex 9886 ax-rrecex 9887 ax-cnre 9888 ax-pre-lttri 9889 ax-pre-lttrn 9890 ax-pre-ltadd 9891 ax-pre-mulgt0 9892 ax-pre-sup 9893 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-reu 2903 df-rmo 2904 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-om 6958 df-1st 7059 df-2nd 7060 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-er 7629 df-map 7746 df-en 7842 df-dom 7843 df-sdom 7844 df-sup 8231 df-inf 8232 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 df-sub 10147 df-neg 10148 df-div 10564 df-nn 10898 df-2 10956 df-n0 11170 df-z 11255 df-uz 11564 df-q 11665 df-rp 11709 df-xneg 11822 df-xadd 11823 df-xmul 11824 df-psmet 19559 df-xmet 19560 df-bl 19562 |
This theorem is referenced by: blbas 22045 elmopn2 22060 mopni2 22108 metss 22123 tgioo 22407 |
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