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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 1090 | . . . . . 6 ⊢ (((abs‘𝑥) ∈ ℝ ∧ 0 ≤ (abs‘𝑥) ∧ (abs‘𝑥) < 𝑅) ↔ (((abs‘𝑥) ∈ ℝ ∧ 0 ≤ (abs‘𝑥)) ∧ (abs‘𝑥) < 𝑅)) | |
2 | abscl 14728 | . . . . . . . . 9 ⊢ (𝑥 ∈ ℂ → (abs‘𝑥) ∈ ℝ) | |
3 | absge0 14737 | . . . . . . . . 9 ⊢ (𝑥 ∈ ℂ → 0 ≤ (abs‘𝑥)) | |
4 | 2, 3 | jca 515 | . . . . . . . 8 ⊢ (𝑥 ∈ ℂ → ((abs‘𝑥) ∈ ℝ ∧ 0 ≤ (abs‘𝑥))) |
5 | 4 | adantl 485 | . . . . . . 7 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → ((abs‘𝑥) ∈ ℝ ∧ 0 ≤ (abs‘𝑥))) |
6 | 5 | biantrurd 536 | . . . . . 6 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → ((abs‘𝑥) < 𝑅 ↔ (((abs‘𝑥) ∈ ℝ ∧ 0 ≤ (abs‘𝑥)) ∧ (abs‘𝑥) < 𝑅))) |
7 | 1, 6 | bitr4id 293 | . . . . 5 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → (((abs‘𝑥) ∈ ℝ ∧ 0 ≤ (abs‘𝑥) ∧ (abs‘𝑥) < 𝑅) ↔ (abs‘𝑥) < 𝑅)) |
8 | 0re 10721 | . . . . . 6 ⊢ 0 ∈ ℝ | |
9 | simpl 486 | . . . . . 6 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → 𝑅 ∈ ℝ*) | |
10 | elico2 12885 | . . . . . 6 ⊢ ((0 ∈ ℝ ∧ 𝑅 ∈ ℝ*) → ((abs‘𝑥) ∈ (0[,)𝑅) ↔ ((abs‘𝑥) ∈ ℝ ∧ 0 ≤ (abs‘𝑥) ∧ (abs‘𝑥) < 𝑅))) | |
11 | 8, 9, 10 | sylancr 590 | . . . . 5 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → ((abs‘𝑥) ∈ (0[,)𝑅) ↔ ((abs‘𝑥) ∈ ℝ ∧ 0 ≤ (abs‘𝑥) ∧ (abs‘𝑥) < 𝑅))) |
12 | 0cn 10711 | . . . . . . . . 9 ⊢ 0 ∈ ℂ | |
13 | cnblcld.1 | . . . . . . . . . . 11 ⊢ 𝐷 = (abs ∘ − ) | |
14 | 13 | cnmetdval 23523 | . . . . . . . . . 10 ⊢ ((0 ∈ ℂ ∧ 𝑥 ∈ ℂ) → (0𝐷𝑥) = (abs‘(0 − 𝑥))) |
15 | abssub 14776 | . . . . . . . . . 10 ⊢ ((0 ∈ ℂ ∧ 𝑥 ∈ ℂ) → (abs‘(0 − 𝑥)) = (abs‘(𝑥 − 0))) | |
16 | 14, 15 | eqtrd 2773 | . . . . . . . . 9 ⊢ ((0 ∈ ℂ ∧ 𝑥 ∈ ℂ) → (0𝐷𝑥) = (abs‘(𝑥 − 0))) |
17 | 12, 16 | mpan 690 | . . . . . . . 8 ⊢ (𝑥 ∈ ℂ → (0𝐷𝑥) = (abs‘(𝑥 − 0))) |
18 | subid1 10984 | . . . . . . . . 9 ⊢ (𝑥 ∈ ℂ → (𝑥 − 0) = 𝑥) | |
19 | 18 | fveq2d 6678 | . . . . . . . 8 ⊢ (𝑥 ∈ ℂ → (abs‘(𝑥 − 0)) = (abs‘𝑥)) |
20 | 17, 19 | eqtrd 2773 | . . . . . . 7 ⊢ (𝑥 ∈ ℂ → (0𝐷𝑥) = (abs‘𝑥)) |
21 | 20 | adantl 485 | . . . . . 6 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → (0𝐷𝑥) = (abs‘𝑥)) |
22 | 21 | breq1d 5040 | . . . . 5 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → ((0𝐷𝑥) < 𝑅 ↔ (abs‘𝑥) < 𝑅)) |
23 | 7, 11, 22 | 3bitr4d 314 | . . . 4 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → ((abs‘𝑥) ∈ (0[,)𝑅) ↔ (0𝐷𝑥) < 𝑅)) |
24 | 23 | pm5.32da 582 | . . 3 ⊢ (𝑅 ∈ ℝ* → ((𝑥 ∈ ℂ ∧ (abs‘𝑥) ∈ (0[,)𝑅)) ↔ (𝑥 ∈ ℂ ∧ (0𝐷𝑥) < 𝑅))) |
25 | absf 14787 | . . . . 5 ⊢ abs:ℂ⟶ℝ | |
26 | ffn 6504 | . . . . 5 ⊢ (abs:ℂ⟶ℝ → abs Fn ℂ) | |
27 | 25, 26 | ax-mp 5 | . . . 4 ⊢ abs Fn ℂ |
28 | elpreima 6835 | . . . 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 23525 | . . . . 5 ⊢ (abs ∘ − ) ∈ (∞Met‘ℂ) | |
31 | 13, 30 | eqeltri 2829 | . . . 4 ⊢ 𝐷 ∈ (∞Met‘ℂ) |
32 | elbl 23141 | . . . 4 ⊢ ((𝐷 ∈ (∞Met‘ℂ) ∧ 0 ∈ ℂ ∧ 𝑅 ∈ ℝ*) → (𝑥 ∈ (0(ball‘𝐷)𝑅) ↔ (𝑥 ∈ ℂ ∧ (0𝐷𝑥) < 𝑅))) | |
33 | 31, 12, 32 | mp3an12 1452 | . . 3 ⊢ (𝑅 ∈ ℝ* → (𝑥 ∈ (0(ball‘𝐷)𝑅) ↔ (𝑥 ∈ ℂ ∧ (0𝐷𝑥) < 𝑅))) |
34 | 24, 29, 33 | 3bitr4d 314 | . 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 209 ∧ wa 399 ∧ w3a 1088 = wceq 1542 ∈ wcel 2114 class class class wbr 5030 ◡ccnv 5524 “ cima 5528 ∘ ccom 5529 Fn wfn 6334 ⟶wf 6335 ‘cfv 6339 (class class class)co 7170 ℂcc 10613 ℝcr 10614 0cc0 10615 ℝ*cxr 10752 < clt 10753 ≤ cle 10754 − cmin 10948 [,)cico 12823 abscabs 14683 ∞Metcxmet 20202 ballcbl 20204 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1975 ax-7 2020 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2162 ax-12 2179 ax-ext 2710 ax-sep 5167 ax-nul 5174 ax-pow 5232 ax-pr 5296 ax-un 7479 ax-cnex 10671 ax-resscn 10672 ax-1cn 10673 ax-icn 10674 ax-addcl 10675 ax-addrcl 10676 ax-mulcl 10677 ax-mulrcl 10678 ax-mulcom 10679 ax-addass 10680 ax-mulass 10681 ax-distr 10682 ax-i2m1 10683 ax-1ne0 10684 ax-1rid 10685 ax-rnegex 10686 ax-rrecex 10687 ax-cnre 10688 ax-pre-lttri 10689 ax-pre-lttrn 10690 ax-pre-ltadd 10691 ax-pre-mulgt0 10692 ax-pre-sup 10693 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2075 df-mo 2540 df-eu 2570 df-clab 2717 df-cleq 2730 df-clel 2811 df-nfc 2881 df-ne 2935 df-nel 3039 df-ral 3058 df-rex 3059 df-reu 3060 df-rmo 3061 df-rab 3062 df-v 3400 df-sbc 3681 df-csb 3791 df-dif 3846 df-un 3848 df-in 3850 df-ss 3860 df-pss 3862 df-nul 4212 df-if 4415 df-pw 4490 df-sn 4517 df-pr 4519 df-tp 4521 df-op 4523 df-uni 4797 df-iun 4883 df-br 5031 df-opab 5093 df-mpt 5111 df-tr 5137 df-id 5429 df-eprel 5434 df-po 5442 df-so 5443 df-fr 5483 df-we 5485 df-xp 5531 df-rel 5532 df-cnv 5533 df-co 5534 df-dm 5535 df-rn 5536 df-res 5537 df-ima 5538 df-pred 6129 df-ord 6175 df-on 6176 df-lim 6177 df-suc 6178 df-iota 6297 df-fun 6341 df-fn 6342 df-f 6343 df-f1 6344 df-fo 6345 df-f1o 6346 df-fv 6347 df-riota 7127 df-ov 7173 df-oprab 7174 df-mpo 7175 df-om 7600 df-1st 7714 df-2nd 7715 df-wrecs 7976 df-recs 8037 df-rdg 8075 df-er 8320 df-map 8439 df-en 8556 df-dom 8557 df-sdom 8558 df-sup 8979 df-pnf 10755 df-mnf 10756 df-xr 10757 df-ltxr 10758 df-le 10759 df-sub 10950 df-neg 10951 df-div 11376 df-nn 11717 df-2 11779 df-3 11780 df-n0 11977 df-z 12063 df-uz 12325 df-rp 12473 df-xadd 12591 df-ico 12827 df-seq 13461 df-exp 13522 df-cj 14548 df-re 14549 df-im 14550 df-sqrt 14684 df-abs 14685 df-psmet 20209 df-xmet 20210 df-met 20211 df-bl 20212 |
This theorem is referenced by: psercnlem2 25171 efopnlem1 25399 binomcxplemdvbinom 41509 binomcxplemnotnn0 41512 |
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