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Mirrors > Home > ILE Home > Th. List > shftval | GIF version |
Description: Value of a sequence shifted by 𝐴. (Contributed by NM, 20-Jul-2005.) (Revised by Mario Carneiro, 4-Nov-2013.) |
Ref | Expression |
---|---|
shftfval.1 | ⊢ 𝐹 ∈ V |
Ref | Expression |
---|---|
shftval | ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((𝐹 shift 𝐴)‘𝐵) = (𝐹‘(𝐵 − 𝐴))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | shftfval.1 | . . . . 5 ⊢ 𝐹 ∈ V | |
2 | 1 | shftfib 10787 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((𝐹 shift 𝐴) “ {𝐵}) = (𝐹 “ {(𝐵 − 𝐴)})) |
3 | 2 | eleq2d 2240 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝑥 ∈ ((𝐹 shift 𝐴) “ {𝐵}) ↔ 𝑥 ∈ (𝐹 “ {(𝐵 − 𝐴)}))) |
4 | 3 | iotabidv 5181 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (℩𝑥𝑥 ∈ ((𝐹 shift 𝐴) “ {𝐵})) = (℩𝑥𝑥 ∈ (𝐹 “ {(𝐵 − 𝐴)}))) |
5 | simpr 109 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → 𝐵 ∈ ℂ) | |
6 | dffv3g 5492 | . . 3 ⊢ (𝐵 ∈ ℂ → ((𝐹 shift 𝐴)‘𝐵) = (℩𝑥𝑥 ∈ ((𝐹 shift 𝐴) “ {𝐵}))) | |
7 | 5, 6 | syl 14 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((𝐹 shift 𝐴)‘𝐵) = (℩𝑥𝑥 ∈ ((𝐹 shift 𝐴) “ {𝐵}))) |
8 | simpl 108 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → 𝐴 ∈ ℂ) | |
9 | 5, 8 | subcld 8230 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐵 − 𝐴) ∈ ℂ) |
10 | dffv3g 5492 | . . 3 ⊢ ((𝐵 − 𝐴) ∈ ℂ → (𝐹‘(𝐵 − 𝐴)) = (℩𝑥𝑥 ∈ (𝐹 “ {(𝐵 − 𝐴)}))) | |
11 | 9, 10 | syl 14 | . 2 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → (𝐹‘(𝐵 − 𝐴)) = (℩𝑥𝑥 ∈ (𝐹 “ {(𝐵 − 𝐴)}))) |
12 | 4, 7, 11 | 3eqtr4d 2213 | 1 ⊢ ((𝐴 ∈ ℂ ∧ 𝐵 ∈ ℂ) → ((𝐹 shift 𝐴)‘𝐵) = (𝐹‘(𝐵 − 𝐴))) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 = wceq 1348 ∈ wcel 2141 Vcvv 2730 {csn 3583 “ cima 4614 ℩cio 5158 ‘cfv 5198 (class class class)co 5853 ℂcc 7772 − cmin 8090 shift cshi 10778 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 609 ax-in2 610 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-13 2143 ax-14 2144 ax-ext 2152 ax-coll 4104 ax-sep 4107 ax-pow 4160 ax-pr 4194 ax-un 4418 ax-setind 4521 ax-resscn 7866 ax-1cn 7867 ax-icn 7869 ax-addcl 7870 ax-addrcl 7871 ax-mulcl 7872 ax-addcom 7874 ax-addass 7876 ax-distr 7878 ax-i2m1 7879 ax-0id 7882 ax-rnegex 7883 ax-cnre 7885 |
This theorem depends on definitions: df-bi 116 df-3an 975 df-tru 1351 df-fal 1354 df-nf 1454 df-sb 1756 df-eu 2022 df-mo 2023 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-ne 2341 df-ral 2453 df-rex 2454 df-reu 2455 df-rab 2457 df-v 2732 df-sbc 2956 df-csb 3050 df-dif 3123 df-un 3125 df-in 3127 df-ss 3134 df-pw 3568 df-sn 3589 df-pr 3590 df-op 3592 df-uni 3797 df-iun 3875 df-br 3990 df-opab 4051 df-mpt 4052 df-id 4278 df-xp 4617 df-rel 4618 df-cnv 4619 df-co 4620 df-dm 4621 df-rn 4622 df-res 4623 df-ima 4624 df-iota 5160 df-fun 5200 df-fn 5201 df-f 5202 df-f1 5203 df-fo 5204 df-f1o 5205 df-fv 5206 df-riota 5809 df-ov 5856 df-oprab 5857 df-mpo 5858 df-sub 8092 df-shft 10779 |
This theorem is referenced by: shftval2 10790 shftval4 10792 shftval5 10793 shftf 10794 shftvalg 10800 isumshft 11453 |
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