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Mirrors > Home > ILE Home > Th. List > climabs0 | GIF version |
Description: Convergence to zero of the absolute value is equivalent to convergence to zero. (Contributed by NM, 8-Jul-2008.) (Revised by Mario Carneiro, 31-Jan-2014.) |
Ref | Expression |
---|---|
climabs0.1 | ⊢ 𝑍 = (ℤ≥‘𝑀) |
climabs0.2 | ⊢ (𝜑 → 𝑀 ∈ ℤ) |
climabs0.3 | ⊢ (𝜑 → 𝐹 ∈ 𝑉) |
climabs0.4 | ⊢ (𝜑 → 𝐺 ∈ 𝑊) |
climabs0.5 | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘𝑘) ∈ ℂ) |
climabs0.6 | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐺‘𝑘) = (abs‘(𝐹‘𝑘))) |
Ref | Expression |
---|---|
climabs0 | ⊢ (𝜑 → (𝐹 ⇝ 0 ↔ 𝐺 ⇝ 0)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | climabs0.1 | . . . . . . . 8 ⊢ 𝑍 = (ℤ≥‘𝑀) | |
2 | 1 | uztrn2 9034 | . . . . . . 7 ⊢ ((𝑗 ∈ 𝑍 ∧ 𝑘 ∈ (ℤ≥‘𝑗)) → 𝑘 ∈ 𝑍) |
3 | climabs0.5 | . . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘𝑘) ∈ ℂ) | |
4 | absidm 10527 | . . . . . . . . 9 ⊢ ((𝐹‘𝑘) ∈ ℂ → (abs‘(abs‘(𝐹‘𝑘))) = (abs‘(𝐹‘𝑘))) | |
5 | 3, 4 | syl 14 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (abs‘(abs‘(𝐹‘𝑘))) = (abs‘(𝐹‘𝑘))) |
6 | 5 | breq1d 3855 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → ((abs‘(abs‘(𝐹‘𝑘))) < 𝑥 ↔ (abs‘(𝐹‘𝑘)) < 𝑥)) |
7 | 2, 6 | sylan2 280 | . . . . . 6 ⊢ ((𝜑 ∧ (𝑗 ∈ 𝑍 ∧ 𝑘 ∈ (ℤ≥‘𝑗))) → ((abs‘(abs‘(𝐹‘𝑘))) < 𝑥 ↔ (abs‘(𝐹‘𝑘)) < 𝑥)) |
8 | 7 | anassrs 392 | . . . . 5 ⊢ (((𝜑 ∧ 𝑗 ∈ 𝑍) ∧ 𝑘 ∈ (ℤ≥‘𝑗)) → ((abs‘(abs‘(𝐹‘𝑘))) < 𝑥 ↔ (abs‘(𝐹‘𝑘)) < 𝑥)) |
9 | 8 | ralbidva 2376 | . . . 4 ⊢ ((𝜑 ∧ 𝑗 ∈ 𝑍) → (∀𝑘 ∈ (ℤ≥‘𝑗)(abs‘(abs‘(𝐹‘𝑘))) < 𝑥 ↔ ∀𝑘 ∈ (ℤ≥‘𝑗)(abs‘(𝐹‘𝑘)) < 𝑥)) |
10 | 9 | rexbidva 2377 | . . 3 ⊢ (𝜑 → (∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ≥‘𝑗)(abs‘(abs‘(𝐹‘𝑘))) < 𝑥 ↔ ∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ≥‘𝑗)(abs‘(𝐹‘𝑘)) < 𝑥)) |
11 | 10 | ralbidv 2380 | . 2 ⊢ (𝜑 → (∀𝑥 ∈ ℝ+ ∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ≥‘𝑗)(abs‘(abs‘(𝐹‘𝑘))) < 𝑥 ↔ ∀𝑥 ∈ ℝ+ ∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ≥‘𝑗)(abs‘(𝐹‘𝑘)) < 𝑥)) |
12 | climabs0.2 | . . 3 ⊢ (𝜑 → 𝑀 ∈ ℤ) | |
13 | climabs0.4 | . . 3 ⊢ (𝜑 → 𝐺 ∈ 𝑊) | |
14 | climabs0.6 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐺‘𝑘) = (abs‘(𝐹‘𝑘))) | |
15 | 3 | abscld 10610 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (abs‘(𝐹‘𝑘)) ∈ ℝ) |
16 | 15 | recnd 7514 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (abs‘(𝐹‘𝑘)) ∈ ℂ) |
17 | 1, 12, 13, 14, 16 | clim0c 10670 | . 2 ⊢ (𝜑 → (𝐺 ⇝ 0 ↔ ∀𝑥 ∈ ℝ+ ∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ≥‘𝑗)(abs‘(abs‘(𝐹‘𝑘))) < 𝑥)) |
18 | climabs0.3 | . . 3 ⊢ (𝜑 → 𝐹 ∈ 𝑉) | |
19 | eqidd 2089 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑍) → (𝐹‘𝑘) = (𝐹‘𝑘)) | |
20 | 1, 12, 18, 19, 3 | clim0c 10670 | . 2 ⊢ (𝜑 → (𝐹 ⇝ 0 ↔ ∀𝑥 ∈ ℝ+ ∃𝑗 ∈ 𝑍 ∀𝑘 ∈ (ℤ≥‘𝑗)(abs‘(𝐹‘𝑘)) < 𝑥)) |
21 | 11, 17, 20 | 3bitr4rd 219 | 1 ⊢ (𝜑 → (𝐹 ⇝ 0 ↔ 𝐺 ⇝ 0)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 102 ↔ wb 103 = wceq 1289 ∈ wcel 1438 ∀wral 2359 ∃wrex 2360 class class class wbr 3845 ‘cfv 5015 ℂcc 7346 0cc0 7348 < clt 7520 ℤcz 8748 ℤ≥cuz 9017 ℝ+crp 9132 abscabs 10426 ⇝ cli 10662 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-in1 579 ax-in2 580 ax-io 665 ax-5 1381 ax-7 1382 ax-gen 1383 ax-ie1 1427 ax-ie2 1428 ax-8 1440 ax-10 1441 ax-11 1442 ax-i12 1443 ax-bndl 1444 ax-4 1445 ax-13 1449 ax-14 1450 ax-17 1464 ax-i9 1468 ax-ial 1472 ax-i5r 1473 ax-ext 2070 ax-coll 3954 ax-sep 3957 ax-nul 3965 ax-pow 4009 ax-pr 4036 ax-un 4260 ax-setind 4353 ax-iinf 4403 ax-cnex 7434 ax-resscn 7435 ax-1cn 7436 ax-1re 7437 ax-icn 7438 ax-addcl 7439 ax-addrcl 7440 ax-mulcl 7441 ax-mulrcl 7442 ax-addcom 7443 ax-mulcom 7444 ax-addass 7445 ax-mulass 7446 ax-distr 7447 ax-i2m1 7448 ax-0lt1 7449 ax-1rid 7450 ax-0id 7451 ax-rnegex 7452 ax-precex 7453 ax-cnre 7454 ax-pre-ltirr 7455 ax-pre-ltwlin 7456 ax-pre-lttrn 7457 ax-pre-apti 7458 ax-pre-ltadd 7459 ax-pre-mulgt0 7460 ax-pre-mulext 7461 ax-arch 7462 ax-caucvg 7463 |
This theorem depends on definitions: df-bi 115 df-dc 781 df-3or 925 df-3an 926 df-tru 1292 df-fal 1295 df-nf 1395 df-sb 1693 df-eu 1951 df-mo 1952 df-clab 2075 df-cleq 2081 df-clel 2084 df-nfc 2217 df-ne 2256 df-nel 2351 df-ral 2364 df-rex 2365 df-reu 2366 df-rmo 2367 df-rab 2368 df-v 2621 df-sbc 2841 df-csb 2934 df-dif 3001 df-un 3003 df-in 3005 df-ss 3012 df-nul 3287 df-if 3394 df-pw 3431 df-sn 3452 df-pr 3453 df-op 3455 df-uni 3654 df-int 3689 df-iun 3732 df-br 3846 df-opab 3900 df-mpt 3901 df-tr 3937 df-id 4120 df-po 4123 df-iso 4124 df-iord 4193 df-on 4195 df-ilim 4196 df-suc 4198 df-iom 4406 df-xp 4444 df-rel 4445 df-cnv 4446 df-co 4447 df-dm 4448 df-rn 4449 df-res 4450 df-ima 4451 df-iota 4980 df-fun 5017 df-fn 5018 df-f 5019 df-f1 5020 df-fo 5021 df-f1o 5022 df-fv 5023 df-riota 5608 df-ov 5655 df-oprab 5656 df-mpt2 5657 df-1st 5911 df-2nd 5912 df-recs 6070 df-frec 6156 df-pnf 7522 df-mnf 7523 df-xr 7524 df-ltxr 7525 df-le 7526 df-sub 7653 df-neg 7654 df-reap 8050 df-ap 8057 df-div 8138 df-inn 8421 df-2 8479 df-3 8480 df-4 8481 df-n0 8672 df-z 8749 df-uz 9018 df-rp 9133 df-iseq 9849 df-seq3 9850 df-exp 9951 df-cj 10272 df-re 10273 df-im 10274 df-rsqrt 10427 df-abs 10428 df-clim 10663 |
This theorem is referenced by: expcnvap0 10892 expcnv 10894 explecnv 10895 |
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