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| Mirrors > Home > ILE Home > Th. List > shftval4g | GIF version | ||
| Description: Value of a sequence shifted by -𝐴. (Contributed by Jim Kingdon, 19-Aug-2021.) |
| Ref | Expression |
|---|---|
| shftval4g | ⊢ ((𝐹 ∈ 𝑉 ∧ 𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((𝐹 shift -𝐴)‘𝐵) = (𝐹‘(𝐴 + 𝐵))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | oveq1 6082 | . . . . . 6 ⊢ (𝑓 = 𝐹 → (𝑓 shift -𝐴) = (𝐹 shift -𝐴)) | |
| 2 | 1 | fveq1d 5692 | . . . . 5 ⊢ (𝑓 = 𝐹 → ((𝑓 shift -𝐴)‘𝐵) = ((𝐹 shift -𝐴)‘𝐵)) |
| 3 | fveq1 5689 | . . . . 5 ⊢ (𝑓 = 𝐹 → (𝑓‘(𝐴 + 𝐵)) = (𝐹‘(𝐴 + 𝐵))) | |
| 4 | 2, 3 | eqeq12d 2253 | . . . 4 ⊢ (𝑓 = 𝐹 → (((𝑓 shift -𝐴)‘𝐵) = (𝑓‘(𝐴 + 𝐵)) ↔ ((𝐹 shift -𝐴)‘𝐵) = (𝐹‘(𝐴 + 𝐵)))) |
| 5 | 4 | imbi2d 230 | . . 3 ⊢ (𝑓 = 𝐹 → (((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((𝑓 shift -𝐴)‘𝐵) = (𝑓‘(𝐴 + 𝐵))) ↔ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((𝐹 shift -𝐴)‘𝐵) = (𝐹‘(𝐴 + 𝐵))))) |
| 6 | vex 2824 | . . . 4 ⊢ 𝑓 ∈ V | |
| 7 | 6 | shftval4 11571 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((𝑓 shift -𝐴)‘𝐵) = (𝑓‘(𝐴 + 𝐵))) |
| 8 | 5, 7 | vtoclg 2883 | . 2 ⊢ (𝐹 ∈ 𝑉 → ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((𝐹 shift -𝐴)‘𝐵) = (𝐹‘(𝐴 + 𝐵)))) |
| 9 | 8 | 3impib 1232 | 1 ⊢ ((𝐹 ∈ 𝑉 ∧ 𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((𝐹 shift -𝐴)‘𝐵) = (𝐹‘(𝐴 + 𝐵))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ∧ w3a 1009 = wceq 1402 ∈ wcel 2209 ‘cfv 5372 (class class class)co 6075 ℂcc 8167 + caddc 8172 -cneg 8488 shift cshi 11557 |
| 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 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-coll 4241 ax-sep 4244 ax-pow 4306 ax-pr 4341 ax-un 4573 ax-setind 4679 ax-resscn 8261 ax-1cn 8262 ax-icn 8264 ax-addcl 8265 ax-addrcl 8266 ax-mulcl 8267 ax-addcom 8269 ax-addass 8271 ax-distr 8273 ax-i2m1 8274 ax-0id 8277 ax-rnegex 8278 ax-cnre 8280 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3687 df-sn 3711 df-pr 3712 df-op 3714 df-uni 3931 df-iun 4009 df-br 4126 df-opab 4188 df-mpt 4189 df-id 4433 df-xp 4775 df-rel 4776 df-cnv 4777 df-co 4778 df-dm 4779 df-rn 4780 df-res 4781 df-ima 4782 df-iota 5332 df-fun 5374 df-fn 5375 df-f 5376 df-f1 5377 df-fo 5378 df-f1o 5379 df-fv 5380 df-riota 6028 df-ov 6078 df-oprab 6079 df-mpo 6080 df-sub 8489 df-neg 8490 df-shft 11558 |
| This theorem is referenced by: climshft2 12050 |
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