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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 6025 | . . . . . 6 ⊢ (𝑓 = 𝐹 → (𝑓 shift 𝑀) = (𝐹 shift 𝑀)) | |
| 2 | 1 | breq1d 4098 | . . . . 5 ⊢ (𝑓 = 𝐹 → ((𝑓 shift 𝑀) ⇝ 𝐴 ↔ (𝐹 shift 𝑀) ⇝ 𝐴)) |
| 3 | breq1 4091 | . . . . 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 9510 | . . . . . 6 ⊢ (𝑀 ∈ ℤ → -𝑀 ∈ ℤ) | |
| 7 | vex 2805 | . . . . . . 7 ⊢ 𝑓 ∈ V | |
| 8 | zcn 9484 | . . . . . . 7 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℂ) | |
| 9 | ovshftex 11384 | . . . . . . 7 ⊢ ((𝑓 ∈ V ∧ 𝑀 ∈ ℂ) → (𝑓 shift 𝑀) ∈ V) | |
| 10 | 7, 8, 9 | sylancr 414 | . . . . . 6 ⊢ (𝑀 ∈ ℤ → (𝑓 shift 𝑀) ∈ V) |
| 11 | climshftlemg 11867 | . . . . . 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 2231 | . . . . . 6 ⊢ (ℤ≥‘𝑀) = (ℤ≥‘𝑀) | |
| 14 | 8 | negcld 8477 | . . . . . . 7 ⊢ (𝑀 ∈ ℤ → -𝑀 ∈ ℂ) |
| 15 | ovshftex 11384 | . . . . . . 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 9767 | . . . . . . 7 ⊢ (𝑘 ∈ (ℤ≥‘𝑀) → 𝑘 ∈ ℂ) | |
| 20 | 7 | shftcan1 11399 | . . . . . . 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 11864 | . . . . 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 11867 | . . . . 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 2864 | . 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 1397 ∈ wcel 2202 Vcvv 2802 class class class wbr 4088 ‘cfv 5326 (class class class)co 6018 ℂcc 8030 -cneg 8351 ℤcz 9479 ℤ≥cuz 9755 shift cshi 11379 ⇝ cli 11843 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-coll 4204 ax-sep 4207 ax-pow 4264 ax-pr 4299 ax-un 4530 ax-setind 4635 ax-cnex 8123 ax-resscn 8124 ax-1cn 8125 ax-1re 8126 ax-icn 8127 ax-addcl 8128 ax-addrcl 8129 ax-mulcl 8130 ax-addcom 8132 ax-addass 8134 ax-distr 8136 ax-i2m1 8137 ax-0lt1 8138 ax-0id 8140 ax-rnegex 8141 ax-cnre 8143 ax-pre-ltirr 8144 ax-pre-ltwlin 8145 ax-pre-lttrn 8146 ax-pre-apti 8147 ax-pre-ltadd 8148 |
| This theorem depends on definitions: df-bi 117 df-dc 842 df-3or 1005 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-nel 2498 df-ral 2515 df-rex 2516 df-reu 2517 df-rab 2519 df-v 2804 df-sbc 3032 df-csb 3128 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-if 3606 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-int 3929 df-iun 3972 df-br 4089 df-opab 4151 df-mpt 4152 df-id 4390 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-rn 4736 df-res 4737 df-ima 4738 df-iota 5286 df-fun 5328 df-fn 5329 df-f 5330 df-f1 5331 df-fo 5332 df-f1o 5333 df-fv 5334 df-riota 5971 df-ov 6021 df-oprab 6022 df-mpo 6023 df-pnf 8216 df-mnf 8217 df-xr 8218 df-ltxr 8219 df-le 8220 df-sub 8352 df-neg 8353 df-inn 9144 df-n0 9403 df-z 9480 df-uz 9756 df-shft 11380 df-clim 11844 |
| This theorem is referenced by: climshft2 11871 iser3shft 11911 eftlub 12256 |
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