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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 5872 | . . . . . 6 ⊢ (𝑓 = 𝐹 → (𝑓 shift 𝑀) = (𝐹 shift 𝑀)) | |
2 | 1 | breq1d 4008 | . . . . 5 ⊢ (𝑓 = 𝐹 → ((𝑓 shift 𝑀) ⇝ 𝐴 ↔ (𝐹 shift 𝑀) ⇝ 𝐴)) |
3 | breq1 4001 | . . . . 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 9257 | . . . . . 6 ⊢ (𝑀 ∈ ℤ → -𝑀 ∈ ℤ) | |
7 | vex 2738 | . . . . . . 7 ⊢ 𝑓 ∈ V | |
8 | zcn 9231 | . . . . . . 7 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ ℂ) | |
9 | ovshftex 10796 | . . . . . . 7 ⊢ ((𝑓 ∈ V ∧ 𝑀 ∈ ℂ) → (𝑓 shift 𝑀) ∈ V) | |
10 | 7, 8, 9 | sylancr 414 | . . . . . 6 ⊢ (𝑀 ∈ ℤ → (𝑓 shift 𝑀) ∈ V) |
11 | climshftlemg 11278 | . . . . . 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 2175 | . . . . . 6 ⊢ (ℤ≥‘𝑀) = (ℤ≥‘𝑀) | |
14 | 8 | negcld 8229 | . . . . . . 7 ⊢ (𝑀 ∈ ℤ → -𝑀 ∈ ℂ) |
15 | ovshftex 10796 | . . . . . . 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 9512 | . . . . . . 7 ⊢ (𝑘 ∈ (ℤ≥‘𝑀) → 𝑘 ∈ ℂ) | |
20 | 7 | shftcan1 10811 | . . . . . . 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 11275 | . . . . 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 11278 | . . . . 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 2795 | . 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 1353 ∈ wcel 2146 Vcvv 2735 class class class wbr 3998 ‘cfv 5208 (class class class)co 5865 ℂcc 7784 -cneg 8103 ℤcz 9226 ℤ≥cuz 9501 shift cshi 10791 ⇝ cli 11254 |
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 614 ax-in2 615 ax-io 709 ax-5 1445 ax-7 1446 ax-gen 1447 ax-ie1 1491 ax-ie2 1492 ax-8 1502 ax-10 1503 ax-11 1504 ax-i12 1505 ax-bndl 1507 ax-4 1508 ax-17 1524 ax-i9 1528 ax-ial 1532 ax-i5r 1533 ax-13 2148 ax-14 2149 ax-ext 2157 ax-coll 4113 ax-sep 4116 ax-pow 4169 ax-pr 4203 ax-un 4427 ax-setind 4530 ax-cnex 7877 ax-resscn 7878 ax-1cn 7879 ax-1re 7880 ax-icn 7881 ax-addcl 7882 ax-addrcl 7883 ax-mulcl 7884 ax-addcom 7886 ax-addass 7888 ax-distr 7890 ax-i2m1 7891 ax-0lt1 7892 ax-0id 7894 ax-rnegex 7895 ax-cnre 7897 ax-pre-ltirr 7898 ax-pre-ltwlin 7899 ax-pre-lttrn 7900 ax-pre-apti 7901 ax-pre-ltadd 7902 |
This theorem depends on definitions: df-bi 117 df-dc 835 df-3or 979 df-3an 980 df-tru 1356 df-fal 1359 df-nf 1459 df-sb 1761 df-eu 2027 df-mo 2028 df-clab 2162 df-cleq 2168 df-clel 2171 df-nfc 2306 df-ne 2346 df-nel 2441 df-ral 2458 df-rex 2459 df-reu 2460 df-rab 2462 df-v 2737 df-sbc 2961 df-csb 3056 df-dif 3129 df-un 3131 df-in 3133 df-ss 3140 df-if 3533 df-pw 3574 df-sn 3595 df-pr 3596 df-op 3598 df-uni 3806 df-int 3841 df-iun 3884 df-br 3999 df-opab 4060 df-mpt 4061 df-id 4287 df-xp 4626 df-rel 4627 df-cnv 4628 df-co 4629 df-dm 4630 df-rn 4631 df-res 4632 df-ima 4633 df-iota 5170 df-fun 5210 df-fn 5211 df-f 5212 df-f1 5213 df-fo 5214 df-f1o 5215 df-fv 5216 df-riota 5821 df-ov 5868 df-oprab 5869 df-mpo 5870 df-pnf 7968 df-mnf 7969 df-xr 7970 df-ltxr 7971 df-le 7972 df-sub 8104 df-neg 8105 df-inn 8893 df-n0 9150 df-z 9227 df-uz 9502 df-shft 10792 df-clim 11255 |
This theorem is referenced by: climshft2 11282 iser3shft 11322 eftlub 11666 |
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