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Mirrors > Home > MPE Home > Th. List > cnbl0 | Structured version Visualization version GIF version |
Description: Two ways to write the open ball centered at zero. (Contributed by Mario Carneiro, 8-Sep-2015.) |
Ref | Expression |
---|---|
cnblcld.1 | ⊢ 𝐷 = (abs ∘ − ) |
Ref | Expression |
---|---|
cnbl0 | ⊢ (𝑅 ∈ ℝ* → (◡abs “ (0[,)𝑅)) = (0(ball‘𝐷)𝑅)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-3an 1088 | . . . . . 6 ⊢ (((abs‘𝑥) ∈ ℝ ∧ 0 ≤ (abs‘𝑥) ∧ (abs‘𝑥) < 𝑅) ↔ (((abs‘𝑥) ∈ ℝ ∧ 0 ≤ (abs‘𝑥)) ∧ (abs‘𝑥) < 𝑅)) | |
2 | abscl 14990 | . . . . . . . . 9 ⊢ (𝑥 ∈ ℂ → (abs‘𝑥) ∈ ℝ) | |
3 | absge0 14999 | . . . . . . . . 9 ⊢ (𝑥 ∈ ℂ → 0 ≤ (abs‘𝑥)) | |
4 | 2, 3 | jca 512 | . . . . . . . 8 ⊢ (𝑥 ∈ ℂ → ((abs‘𝑥) ∈ ℝ ∧ 0 ≤ (abs‘𝑥))) |
5 | 4 | adantl 482 | . . . . . . 7 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → ((abs‘𝑥) ∈ ℝ ∧ 0 ≤ (abs‘𝑥))) |
6 | 5 | biantrurd 533 | . . . . . 6 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → ((abs‘𝑥) < 𝑅 ↔ (((abs‘𝑥) ∈ ℝ ∧ 0 ≤ (abs‘𝑥)) ∧ (abs‘𝑥) < 𝑅))) |
7 | 1, 6 | bitr4id 290 | . . . . 5 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → (((abs‘𝑥) ∈ ℝ ∧ 0 ≤ (abs‘𝑥) ∧ (abs‘𝑥) < 𝑅) ↔ (abs‘𝑥) < 𝑅)) |
8 | 0re 10977 | . . . . . 6 ⊢ 0 ∈ ℝ | |
9 | simpl 483 | . . . . . 6 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → 𝑅 ∈ ℝ*) | |
10 | elico2 13143 | . . . . . 6 ⊢ ((0 ∈ ℝ ∧ 𝑅 ∈ ℝ*) → ((abs‘𝑥) ∈ (0[,)𝑅) ↔ ((abs‘𝑥) ∈ ℝ ∧ 0 ≤ (abs‘𝑥) ∧ (abs‘𝑥) < 𝑅))) | |
11 | 8, 9, 10 | sylancr 587 | . . . . 5 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → ((abs‘𝑥) ∈ (0[,)𝑅) ↔ ((abs‘𝑥) ∈ ℝ ∧ 0 ≤ (abs‘𝑥) ∧ (abs‘𝑥) < 𝑅))) |
12 | 0cn 10967 | . . . . . . . . 9 ⊢ 0 ∈ ℂ | |
13 | cnblcld.1 | . . . . . . . . . . 11 ⊢ 𝐷 = (abs ∘ − ) | |
14 | 13 | cnmetdval 23934 | . . . . . . . . . 10 ⊢ ((0 ∈ ℂ ∧ 𝑥 ∈ ℂ) → (0𝐷𝑥) = (abs‘(0 − 𝑥))) |
15 | abssub 15038 | . . . . . . . . . 10 ⊢ ((0 ∈ ℂ ∧ 𝑥 ∈ ℂ) → (abs‘(0 − 𝑥)) = (abs‘(𝑥 − 0))) | |
16 | 14, 15 | eqtrd 2778 | . . . . . . . . 9 ⊢ ((0 ∈ ℂ ∧ 𝑥 ∈ ℂ) → (0𝐷𝑥) = (abs‘(𝑥 − 0))) |
17 | 12, 16 | mpan 687 | . . . . . . . 8 ⊢ (𝑥 ∈ ℂ → (0𝐷𝑥) = (abs‘(𝑥 − 0))) |
18 | subid1 11241 | . . . . . . . . 9 ⊢ (𝑥 ∈ ℂ → (𝑥 − 0) = 𝑥) | |
19 | 18 | fveq2d 6778 | . . . . . . . 8 ⊢ (𝑥 ∈ ℂ → (abs‘(𝑥 − 0)) = (abs‘𝑥)) |
20 | 17, 19 | eqtrd 2778 | . . . . . . 7 ⊢ (𝑥 ∈ ℂ → (0𝐷𝑥) = (abs‘𝑥)) |
21 | 20 | adantl 482 | . . . . . 6 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → (0𝐷𝑥) = (abs‘𝑥)) |
22 | 21 | breq1d 5084 | . . . . 5 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → ((0𝐷𝑥) < 𝑅 ↔ (abs‘𝑥) < 𝑅)) |
23 | 7, 11, 22 | 3bitr4d 311 | . . . 4 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → ((abs‘𝑥) ∈ (0[,)𝑅) ↔ (0𝐷𝑥) < 𝑅)) |
24 | 23 | pm5.32da 579 | . . 3 ⊢ (𝑅 ∈ ℝ* → ((𝑥 ∈ ℂ ∧ (abs‘𝑥) ∈ (0[,)𝑅)) ↔ (𝑥 ∈ ℂ ∧ (0𝐷𝑥) < 𝑅))) |
25 | absf 15049 | . . . . 5 ⊢ abs:ℂ⟶ℝ | |
26 | ffn 6600 | . . . . 5 ⊢ (abs:ℂ⟶ℝ → abs Fn ℂ) | |
27 | 25, 26 | ax-mp 5 | . . . 4 ⊢ abs Fn ℂ |
28 | elpreima 6935 | . . . 4 ⊢ (abs Fn ℂ → (𝑥 ∈ (◡abs “ (0[,)𝑅)) ↔ (𝑥 ∈ ℂ ∧ (abs‘𝑥) ∈ (0[,)𝑅)))) | |
29 | 27, 28 | mp1i 13 | . . 3 ⊢ (𝑅 ∈ ℝ* → (𝑥 ∈ (◡abs “ (0[,)𝑅)) ↔ (𝑥 ∈ ℂ ∧ (abs‘𝑥) ∈ (0[,)𝑅)))) |
30 | cnxmet 23936 | . . . . 5 ⊢ (abs ∘ − ) ∈ (∞Met‘ℂ) | |
31 | 13, 30 | eqeltri 2835 | . . . 4 ⊢ 𝐷 ∈ (∞Met‘ℂ) |
32 | elbl 23541 | . . . 4 ⊢ ((𝐷 ∈ (∞Met‘ℂ) ∧ 0 ∈ ℂ ∧ 𝑅 ∈ ℝ*) → (𝑥 ∈ (0(ball‘𝐷)𝑅) ↔ (𝑥 ∈ ℂ ∧ (0𝐷𝑥) < 𝑅))) | |
33 | 31, 12, 32 | mp3an12 1450 | . . 3 ⊢ (𝑅 ∈ ℝ* → (𝑥 ∈ (0(ball‘𝐷)𝑅) ↔ (𝑥 ∈ ℂ ∧ (0𝐷𝑥) < 𝑅))) |
34 | 24, 29, 33 | 3bitr4d 311 | . 2 ⊢ (𝑅 ∈ ℝ* → (𝑥 ∈ (◡abs “ (0[,)𝑅)) ↔ 𝑥 ∈ (0(ball‘𝐷)𝑅))) |
35 | 34 | eqrdv 2736 | 1 ⊢ (𝑅 ∈ ℝ* → (◡abs “ (0[,)𝑅)) = (0(ball‘𝐷)𝑅)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 ∧ w3a 1086 = wceq 1539 ∈ wcel 2106 class class class wbr 5074 ◡ccnv 5588 “ cima 5592 ∘ ccom 5593 Fn wfn 6428 ⟶wf 6429 ‘cfv 6433 (class class class)co 7275 ℂcc 10869 ℝcr 10870 0cc0 10871 ℝ*cxr 11008 < clt 11009 ≤ cle 11010 − cmin 11205 [,)cico 13081 abscabs 14945 ∞Metcxmet 20582 ballcbl 20584 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 ax-pre-sup 10949 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-1st 7831 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-er 8498 df-map 8617 df-en 8734 df-dom 8735 df-sdom 8736 df-sup 9201 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-div 11633 df-nn 11974 df-2 12036 df-3 12037 df-n0 12234 df-z 12320 df-uz 12583 df-rp 12731 df-xadd 12849 df-ico 13085 df-seq 13722 df-exp 13783 df-cj 14810 df-re 14811 df-im 14812 df-sqrt 14946 df-abs 14947 df-psmet 20589 df-xmet 20590 df-met 20591 df-bl 20592 |
This theorem is referenced by: psercnlem2 25583 efopnlem1 25811 binomcxplemdvbinom 41971 binomcxplemnotnn0 41974 |
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