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| Mirrors > Home > ILE Home > Th. List > climshft | GIF version | ||
| Description: A shifted function converges iff the original function converges. (Contributed by NM, 16-Aug-2005.) (Revised by Mario Carneiro, 31-Jan-2014.) |
| Ref | Expression |
|---|---|
| climshft | ⊢ ((𝑀 ∈ ℤ ∧ 𝐹 ∈ 𝑉) → ((𝐹 shift 𝑀) ⇝ 𝐴 ↔ 𝐹 ⇝ 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | oveq1 6065 | . . . . . 6 ⊢ (𝑓 = 𝐹 → (𝑓 shift 𝑀) = (𝐹 shift 𝑀)) | |
| 2 | 1 | breq1d 4124 | . . . . 5 ⊢ (𝑓 = 𝐹 → ((𝑓 shift 𝑀) ⇝ 𝐴 ↔ (𝐹 shift 𝑀) ⇝ 𝐴)) |
| 3 | breq1 4117 | . . . . 5 ⊢ (𝑓 = 𝐹 → (𝑓 ⇝ 𝐴 ↔ 𝐹 ⇝ 𝐴)) | |
| 4 | 2, 3 | bibi12d 235 | . . . 4 ⊢ (𝑓 = 𝐹 → (((𝑓 shift 𝑀) ⇝ 𝐴 ↔ 𝑓 ⇝ 𝐴) ↔ ((𝐹 shift 𝑀) ⇝ 𝐴 ↔ 𝐹 ⇝ 𝐴))) |
| 5 | 4 | imbi2d 230 | . . 3 ⊢ (𝑓 = 𝐹 → ((𝑀 ∈ ℤ → ((𝑓 shift 𝑀) ⇝ 𝐴 ↔ 𝑓 ⇝ 𝐴)) ↔ (𝑀 ∈ ℤ → ((𝐹 shift 𝑀) ⇝ 𝐴 ↔ 𝐹 ⇝ 𝐴)))) |
| 6 | znegcl 9625 | . . . . . 6 ⊢ (𝑀 ∈ ℤ → -𝑀 ∈ ℤ) | |
| 7 | vex 2818 | . . . . . . 7 ⊢ 𝑓 ∈ V | |
| 8 | zcn 9599 | . . . . . . 7 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℂ) | |
| 9 | ovshftex 11529 | . . . . . . 7 ⊢ ((𝑓 ∈ V ∧ 𝑀 ∈ ℂ) → (𝑓 shift 𝑀) ∈ V) | |
| 10 | 7, 8, 9 | sylancr 414 | . . . . . 6 ⊢ (𝑀 ∈ ℤ → (𝑓 shift 𝑀) ∈ V) |
| 11 | climshftlemg 12012 | . . . . . 6 ⊢ ((-𝑀 ∈ ℤ ∧ (𝑓 shift 𝑀) ∈ V) → ((𝑓 shift 𝑀) ⇝ 𝐴 → ((𝑓 shift 𝑀) shift -𝑀) ⇝ 𝐴)) | |
| 12 | 6, 10, 11 | syl2anc 411 | . . . . 5 ⊢ (𝑀 ∈ ℤ → ((𝑓 shift 𝑀) ⇝ 𝐴 → ((𝑓 shift 𝑀) shift -𝑀) ⇝ 𝐴)) |
| 13 | eqid 2234 | . . . . . 6 ⊢ (ℤ≥‘𝑀) = (ℤ≥‘𝑀) | |
| 14 | 8 | negcld 8587 | . . . . . . 7 ⊢ (𝑀 ∈ ℤ → -𝑀 ∈ ℂ) |
| 15 | ovshftex 11529 | . . . . . . 7 ⊢ (((𝑓 shift 𝑀) ∈ V ∧ -𝑀 ∈ ℂ) → ((𝑓 shift 𝑀) shift -𝑀) ∈ V) | |
| 16 | 10, 14, 15 | syl2anc 411 | . . . . . 6 ⊢ (𝑀 ∈ ℤ → ((𝑓 shift 𝑀) shift -𝑀) ∈ V) |
| 17 | 7 | a1i 9 | . . . . . 6 ⊢ (𝑀 ∈ ℤ → 𝑓 ∈ V) |
| 18 | id 19 | . . . . . 6 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℤ) | |
| 19 | eluzelcn 9883 | . . . . . . 7 ⊢ (𝑘 ∈ (ℤ≥‘𝑀) → 𝑘 ∈ ℂ) | |
| 20 | 7 | shftcan1 11544 | . . . . . . 7 ⊢ ((𝑀 ∈ ℂ ∧ 𝑘 ∈ ℂ) → (((𝑓 shift 𝑀) shift -𝑀)‘𝑘) = (𝑓‘𝑘)) |
| 21 | 8, 19, 20 | syl2an 289 | . . . . . 6 ⊢ ((𝑀 ∈ ℤ ∧ 𝑘 ∈ (ℤ≥‘𝑀)) → (((𝑓 shift 𝑀) shift -𝑀)‘𝑘) = (𝑓‘𝑘)) |
| 22 | 13, 16, 17, 18, 21 | climeq 12009 | . . . . 5 ⊢ (𝑀 ∈ ℤ → (((𝑓 shift 𝑀) shift -𝑀) ⇝ 𝐴 ↔ 𝑓 ⇝ 𝐴)) |
| 23 | 12, 22 | sylibd 149 | . . . 4 ⊢ (𝑀 ∈ ℤ → ((𝑓 shift 𝑀) ⇝ 𝐴 → 𝑓 ⇝ 𝐴)) |
| 24 | climshftlemg 12012 | . . . . 5 ⊢ ((𝑀 ∈ ℤ ∧ 𝑓 ∈ V) → (𝑓 ⇝ 𝐴 → (𝑓 shift 𝑀) ⇝ 𝐴)) | |
| 25 | 7, 24 | mpan2 425 | . . . 4 ⊢ (𝑀 ∈ ℤ → (𝑓 ⇝ 𝐴 → (𝑓 shift 𝑀) ⇝ 𝐴)) |
| 26 | 23, 25 | impbid 129 | . . 3 ⊢ (𝑀 ∈ ℤ → ((𝑓 shift 𝑀) ⇝ 𝐴 ↔ 𝑓 ⇝ 𝐴)) |
| 27 | 5, 26 | vtoclg 2877 | . 2 ⊢ (𝐹 ∈ 𝑉 → (𝑀 ∈ ℤ → ((𝐹 shift 𝑀) ⇝ 𝐴 ↔ 𝐹 ⇝ 𝐴))) |
| 28 | 27 | impcom 125 | 1 ⊢ ((𝑀 ∈ ℤ ∧ 𝐹 ∈ 𝑉) → ((𝐹 shift 𝑀) ⇝ 𝐴 ↔ 𝐹 ⇝ 𝐴)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 = wceq 1398 ∈ wcel 2205 Vcvv 2815 class class class wbr 4114 ‘cfv 5357 (class class class)co 6058 ℂcc 8141 -cneg 8461 ℤcz 9594 ℤ≥cuz 9871 shift cshi 11524 ⇝ cli 11988 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2207 ax-14 2208 ax-ext 2216 ax-coll 4230 ax-sep 4233 ax-pow 4292 ax-pr 4327 ax-un 4559 ax-setind 4664 ax-cnex 8234 ax-resscn 8235 ax-1cn 8236 ax-1re 8237 ax-icn 8238 ax-addcl 8239 ax-addrcl 8240 ax-mulcl 8241 ax-addcom 8243 ax-addass 8245 ax-distr 8247 ax-i2m1 8248 ax-0lt1 8249 ax-0id 8251 ax-rnegex 8252 ax-cnre 8254 ax-pre-ltirr 8255 ax-pre-ltwlin 8256 ax-pre-lttrn 8257 ax-pre-apti 8258 ax-pre-ltadd 8259 |
| This theorem depends on definitions: df-bi 117 df-dc 843 df-3or 1006 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ne 2415 df-nel 2510 df-ral 2527 df-rex 2528 df-reu 2529 df-rab 2531 df-v 2817 df-sbc 3046 df-csb 3142 df-dif 3216 df-un 3218 df-in 3220 df-ss 3227 df-if 3625 df-pw 3676 df-sn 3700 df-pr 3701 df-op 3703 df-uni 3920 df-int 3955 df-iun 3998 df-br 4115 df-opab 4177 df-mpt 4178 df-id 4419 df-xp 4760 df-rel 4761 df-cnv 4762 df-co 4763 df-dm 4764 df-rn 4765 df-res 4766 df-ima 4767 df-iota 5317 df-fun 5359 df-fn 5360 df-f 5361 df-f1 5362 df-fo 5363 df-f1o 5364 df-fv 5365 df-riota 6011 df-ov 6061 df-oprab 6062 df-mpo 6063 df-pnf 8326 df-mnf 8327 df-xr 8328 df-ltxr 8329 df-le 8330 df-sub 8462 df-neg 8463 df-inn 9255 df-n0 9514 df-z 9595 df-uz 9872 df-shft 11525 df-clim 11989 |
| This theorem is referenced by: climshft2 12016 iser3shft 12056 eftlub 12401 |
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