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Mirrors > Home > ILE Home > Th. List > cnblcld | GIF version |
Description: Two ways to write the closed ball centered at zero. (Contributed by Mario Carneiro, 8-Sep-2015.) |
Ref | Expression |
---|---|
cnblcld.1 | ⊢ 𝐷 = (abs ∘ − ) |
Ref | Expression |
---|---|
cnblcld | ⊢ (𝑅 ∈ ℝ* → (◡abs “ (0[,]𝑅)) = {𝑥 ∈ ℂ ∣ (0𝐷𝑥) ≤ 𝑅}) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | absf 11063 | . . . . 5 ⊢ abs:ℂ⟶ℝ | |
2 | ffn 5345 | . . . . 5 ⊢ (abs:ℂ⟶ℝ → abs Fn ℂ) | |
3 | elpreima 5613 | . . . . 5 ⊢ (abs Fn ℂ → (𝑥 ∈ (◡abs “ (0[,]𝑅)) ↔ (𝑥 ∈ ℂ ∧ (abs‘𝑥) ∈ (0[,]𝑅)))) | |
4 | 1, 2, 3 | mp2b 8 | . . . 4 ⊢ (𝑥 ∈ (◡abs “ (0[,]𝑅)) ↔ (𝑥 ∈ ℂ ∧ (abs‘𝑥) ∈ (0[,]𝑅))) |
5 | df-3an 975 | . . . . . . 7 ⊢ (((abs‘𝑥) ∈ ℝ* ∧ 0 ≤ (abs‘𝑥) ∧ (abs‘𝑥) ≤ 𝑅) ↔ (((abs‘𝑥) ∈ ℝ* ∧ 0 ≤ (abs‘𝑥)) ∧ (abs‘𝑥) ≤ 𝑅)) | |
6 | abscl 11004 | . . . . . . . . . . 11 ⊢ (𝑥 ∈ ℂ → (abs‘𝑥) ∈ ℝ) | |
7 | 6 | rexrd 7958 | . . . . . . . . . 10 ⊢ (𝑥 ∈ ℂ → (abs‘𝑥) ∈ ℝ*) |
8 | absge0 11013 | . . . . . . . . . 10 ⊢ (𝑥 ∈ ℂ → 0 ≤ (abs‘𝑥)) | |
9 | 7, 8 | jca 304 | . . . . . . . . 9 ⊢ (𝑥 ∈ ℂ → ((abs‘𝑥) ∈ ℝ* ∧ 0 ≤ (abs‘𝑥))) |
10 | 9 | adantl 275 | . . . . . . . 8 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → ((abs‘𝑥) ∈ ℝ* ∧ 0 ≤ (abs‘𝑥))) |
11 | 10 | biantrurd 303 | . . . . . . 7 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → ((abs‘𝑥) ≤ 𝑅 ↔ (((abs‘𝑥) ∈ ℝ* ∧ 0 ≤ (abs‘𝑥)) ∧ (abs‘𝑥) ≤ 𝑅))) |
12 | 5, 11 | bitr4id 198 | . . . . . 6 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → (((abs‘𝑥) ∈ ℝ* ∧ 0 ≤ (abs‘𝑥) ∧ (abs‘𝑥) ≤ 𝑅) ↔ (abs‘𝑥) ≤ 𝑅)) |
13 | 0xr 7955 | . . . . . . 7 ⊢ 0 ∈ ℝ* | |
14 | simpl 108 | . . . . . . 7 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → 𝑅 ∈ ℝ*) | |
15 | elicc1 9870 | . . . . . . 7 ⊢ ((0 ∈ ℝ* ∧ 𝑅 ∈ ℝ*) → ((abs‘𝑥) ∈ (0[,]𝑅) ↔ ((abs‘𝑥) ∈ ℝ* ∧ 0 ≤ (abs‘𝑥) ∧ (abs‘𝑥) ≤ 𝑅))) | |
16 | 13, 14, 15 | sylancr 412 | . . . . . 6 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → ((abs‘𝑥) ∈ (0[,]𝑅) ↔ ((abs‘𝑥) ∈ ℝ* ∧ 0 ≤ (abs‘𝑥) ∧ (abs‘𝑥) ≤ 𝑅))) |
17 | 0cn 7901 | . . . . . . . . . 10 ⊢ 0 ∈ ℂ | |
18 | cnblcld.1 | . . . . . . . . . . . 12 ⊢ 𝐷 = (abs ∘ − ) | |
19 | 18 | cnmetdval 13284 | . . . . . . . . . . 11 ⊢ ((0 ∈ ℂ ∧ 𝑥 ∈ ℂ) → (0𝐷𝑥) = (abs‘(0 − 𝑥))) |
20 | abssub 11054 | . . . . . . . . . . 11 ⊢ ((0 ∈ ℂ ∧ 𝑥 ∈ ℂ) → (abs‘(0 − 𝑥)) = (abs‘(𝑥 − 0))) | |
21 | 19, 20 | eqtrd 2203 | . . . . . . . . . 10 ⊢ ((0 ∈ ℂ ∧ 𝑥 ∈ ℂ) → (0𝐷𝑥) = (abs‘(𝑥 − 0))) |
22 | 17, 21 | mpan 422 | . . . . . . . . 9 ⊢ (𝑥 ∈ ℂ → (0𝐷𝑥) = (abs‘(𝑥 − 0))) |
23 | subid1 8128 | . . . . . . . . . 10 ⊢ (𝑥 ∈ ℂ → (𝑥 − 0) = 𝑥) | |
24 | 23 | fveq2d 5498 | . . . . . . . . 9 ⊢ (𝑥 ∈ ℂ → (abs‘(𝑥 − 0)) = (abs‘𝑥)) |
25 | 22, 24 | eqtrd 2203 | . . . . . . . 8 ⊢ (𝑥 ∈ ℂ → (0𝐷𝑥) = (abs‘𝑥)) |
26 | 25 | adantl 275 | . . . . . . 7 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → (0𝐷𝑥) = (abs‘𝑥)) |
27 | 26 | breq1d 3997 | . . . . . 6 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → ((0𝐷𝑥) ≤ 𝑅 ↔ (abs‘𝑥) ≤ 𝑅)) |
28 | 12, 16, 27 | 3bitr4d 219 | . . . . 5 ⊢ ((𝑅 ∈ ℝ* ∧ 𝑥 ∈ ℂ) → ((abs‘𝑥) ∈ (0[,]𝑅) ↔ (0𝐷𝑥) ≤ 𝑅)) |
29 | 28 | pm5.32da 449 | . . . 4 ⊢ (𝑅 ∈ ℝ* → ((𝑥 ∈ ℂ ∧ (abs‘𝑥) ∈ (0[,]𝑅)) ↔ (𝑥 ∈ ℂ ∧ (0𝐷𝑥) ≤ 𝑅))) |
30 | 4, 29 | syl5bb 191 | . . 3 ⊢ (𝑅 ∈ ℝ* → (𝑥 ∈ (◡abs “ (0[,]𝑅)) ↔ (𝑥 ∈ ℂ ∧ (0𝐷𝑥) ≤ 𝑅))) |
31 | 30 | abbi2dv 2289 | . 2 ⊢ (𝑅 ∈ ℝ* → (◡abs “ (0[,]𝑅)) = {𝑥 ∣ (𝑥 ∈ ℂ ∧ (0𝐷𝑥) ≤ 𝑅)}) |
32 | df-rab 2457 | . 2 ⊢ {𝑥 ∈ ℂ ∣ (0𝐷𝑥) ≤ 𝑅} = {𝑥 ∣ (𝑥 ∈ ℂ ∧ (0𝐷𝑥) ≤ 𝑅)} | |
33 | 31, 32 | eqtr4di 2221 | 1 ⊢ (𝑅 ∈ ℝ* → (◡abs “ (0[,]𝑅)) = {𝑥 ∈ ℂ ∣ (0𝐷𝑥) ≤ 𝑅}) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 ∧ w3a 973 = wceq 1348 ∈ wcel 2141 {cab 2156 {crab 2452 class class class wbr 3987 ◡ccnv 4608 “ cima 4612 ∘ ccom 4613 Fn wfn 5191 ⟶wf 5192 ‘cfv 5196 (class class class)co 5851 ℂcc 7761 ℝcr 7762 0cc0 7763 ℝ*cxr 7942 ≤ cle 7944 − cmin 8079 [,]cicc 9837 abscabs 10950 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 609 ax-in2 610 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-13 2143 ax-14 2144 ax-ext 2152 ax-coll 4102 ax-sep 4105 ax-nul 4113 ax-pow 4158 ax-pr 4192 ax-un 4416 ax-setind 4519 ax-iinf 4570 ax-cnex 7854 ax-resscn 7855 ax-1cn 7856 ax-1re 7857 ax-icn 7858 ax-addcl 7859 ax-addrcl 7860 ax-mulcl 7861 ax-mulrcl 7862 ax-addcom 7863 ax-mulcom 7864 ax-addass 7865 ax-mulass 7866 ax-distr 7867 ax-i2m1 7868 ax-0lt1 7869 ax-1rid 7870 ax-0id 7871 ax-rnegex 7872 ax-precex 7873 ax-cnre 7874 ax-pre-ltirr 7875 ax-pre-ltwlin 7876 ax-pre-lttrn 7877 ax-pre-apti 7878 ax-pre-ltadd 7879 ax-pre-mulgt0 7880 ax-pre-mulext 7881 ax-arch 7882 ax-caucvg 7883 |
This theorem depends on definitions: df-bi 116 df-dc 830 df-3or 974 df-3an 975 df-tru 1351 df-fal 1354 df-nf 1454 df-sb 1756 df-eu 2022 df-mo 2023 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-ne 2341 df-nel 2436 df-ral 2453 df-rex 2454 df-reu 2455 df-rmo 2456 df-rab 2457 df-v 2732 df-sbc 2956 df-csb 3050 df-dif 3123 df-un 3125 df-in 3127 df-ss 3134 df-nul 3415 df-if 3526 df-pw 3566 df-sn 3587 df-pr 3588 df-op 3590 df-uni 3795 df-int 3830 df-iun 3873 df-br 3988 df-opab 4049 df-mpt 4050 df-tr 4086 df-id 4276 df-po 4279 df-iso 4280 df-iord 4349 df-on 4351 df-ilim 4352 df-suc 4354 df-iom 4573 df-xp 4615 df-rel 4616 df-cnv 4617 df-co 4618 df-dm 4619 df-rn 4620 df-res 4621 df-ima 4622 df-iota 5158 df-fun 5198 df-fn 5199 df-f 5200 df-f1 5201 df-fo 5202 df-f1o 5203 df-fv 5204 df-riota 5807 df-ov 5854 df-oprab 5855 df-mpo 5856 df-1st 6117 df-2nd 6118 df-recs 6282 df-frec 6368 df-pnf 7945 df-mnf 7946 df-xr 7947 df-ltxr 7948 df-le 7949 df-sub 8081 df-neg 8082 df-reap 8483 df-ap 8490 df-div 8579 df-inn 8868 df-2 8926 df-3 8927 df-4 8928 df-n0 9125 df-z 9202 df-uz 9477 df-rp 9600 df-icc 9841 df-seqfrec 10391 df-exp 10465 df-cj 10795 df-re 10796 df-im 10797 df-rsqrt 10951 df-abs 10952 |
This theorem is referenced by: (None) |
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