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Mirrors > Home > ILE Home > Th. List > shftf | GIF version |
Description: Functionality of a shifted sequence. (Contributed by NM, 19-Aug-2005.) (Revised by Mario Carneiro, 5-Nov-2013.) |
Ref | Expression |
---|---|
shftfval.1 | ⊢ 𝐹 ∈ V |
Ref | Expression |
---|---|
shftf | ⊢ ((𝐹:𝐵⟶𝐶 ∧ 𝐴 ∈ ℂ) → (𝐹 shift 𝐴):{𝑥 ∈ ℂ ∣ (𝑥 − 𝐴) ∈ 𝐵}⟶𝐶) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ffn 5347 | . . 3 ⊢ (𝐹:𝐵⟶𝐶 → 𝐹 Fn 𝐵) | |
2 | shftfval.1 | . . . 4 ⊢ 𝐹 ∈ V | |
3 | 2 | shftfn 10788 | . . 3 ⊢ ((𝐹 Fn 𝐵 ∧ 𝐴 ∈ ℂ) → (𝐹 shift 𝐴) Fn {𝑥 ∈ ℂ ∣ (𝑥 − 𝐴) ∈ 𝐵}) |
4 | 1, 3 | sylan 281 | . 2 ⊢ ((𝐹:𝐵⟶𝐶 ∧ 𝐴 ∈ ℂ) → (𝐹 shift 𝐴) Fn {𝑥 ∈ ℂ ∣ (𝑥 − 𝐴) ∈ 𝐵}) |
5 | oveq1 5860 | . . . . . 6 ⊢ (𝑥 = 𝑦 → (𝑥 − 𝐴) = (𝑦 − 𝐴)) | |
6 | 5 | eleq1d 2239 | . . . . 5 ⊢ (𝑥 = 𝑦 → ((𝑥 − 𝐴) ∈ 𝐵 ↔ (𝑦 − 𝐴) ∈ 𝐵)) |
7 | 6 | elrab 2886 | . . . 4 ⊢ (𝑦 ∈ {𝑥 ∈ ℂ ∣ (𝑥 − 𝐴) ∈ 𝐵} ↔ (𝑦 ∈ ℂ ∧ (𝑦 − 𝐴) ∈ 𝐵)) |
8 | simpr 109 | . . . . . 6 ⊢ ((𝐹:𝐵⟶𝐶 ∧ 𝐴 ∈ ℂ) → 𝐴 ∈ ℂ) | |
9 | simpl 108 | . . . . . 6 ⊢ ((𝑦 ∈ ℂ ∧ (𝑦 − 𝐴) ∈ 𝐵) → 𝑦 ∈ ℂ) | |
10 | 2 | shftval 10789 | . . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → ((𝐹 shift 𝐴)‘𝑦) = (𝐹‘(𝑦 − 𝐴))) |
11 | 8, 9, 10 | syl2an 287 | . . . . 5 ⊢ (((𝐹:𝐵⟶𝐶 ∧ 𝐴 ∈ ℂ) ∧ (𝑦 ∈ ℂ ∧ (𝑦 − 𝐴) ∈ 𝐵)) → ((𝐹 shift 𝐴)‘𝑦) = (𝐹‘(𝑦 − 𝐴))) |
12 | simpl 108 | . . . . . 6 ⊢ ((𝐹:𝐵⟶𝐶 ∧ 𝐴 ∈ ℂ) → 𝐹:𝐵⟶𝐶) | |
13 | simpr 109 | . . . . . 6 ⊢ ((𝑦 ∈ ℂ ∧ (𝑦 − 𝐴) ∈ 𝐵) → (𝑦 − 𝐴) ∈ 𝐵) | |
14 | ffvelrn 5629 | . . . . . 6 ⊢ ((𝐹:𝐵⟶𝐶 ∧ (𝑦 − 𝐴) ∈ 𝐵) → (𝐹‘(𝑦 − 𝐴)) ∈ 𝐶) | |
15 | 12, 13, 14 | syl2an 287 | . . . . 5 ⊢ (((𝐹:𝐵⟶𝐶 ∧ 𝐴 ∈ ℂ) ∧ (𝑦 ∈ ℂ ∧ (𝑦 − 𝐴) ∈ 𝐵)) → (𝐹‘(𝑦 − 𝐴)) ∈ 𝐶) |
16 | 11, 15 | eqeltrd 2247 | . . . 4 ⊢ (((𝐹:𝐵⟶𝐶 ∧ 𝐴 ∈ ℂ) ∧ (𝑦 ∈ ℂ ∧ (𝑦 − 𝐴) ∈ 𝐵)) → ((𝐹 shift 𝐴)‘𝑦) ∈ 𝐶) |
17 | 7, 16 | sylan2b 285 | . . 3 ⊢ (((𝐹:𝐵⟶𝐶 ∧ 𝐴 ∈ ℂ) ∧ 𝑦 ∈ {𝑥 ∈ ℂ ∣ (𝑥 − 𝐴) ∈ 𝐵}) → ((𝐹 shift 𝐴)‘𝑦) ∈ 𝐶) |
18 | 17 | ralrimiva 2543 | . 2 ⊢ ((𝐹:𝐵⟶𝐶 ∧ 𝐴 ∈ ℂ) → ∀𝑦 ∈ {𝑥 ∈ ℂ ∣ (𝑥 − 𝐴) ∈ 𝐵} ((𝐹 shift 𝐴)‘𝑦) ∈ 𝐶) |
19 | ffnfv 5654 | . 2 ⊢ ((𝐹 shift 𝐴):{𝑥 ∈ ℂ ∣ (𝑥 − 𝐴) ∈ 𝐵}⟶𝐶 ↔ ((𝐹 shift 𝐴) Fn {𝑥 ∈ ℂ ∣ (𝑥 − 𝐴) ∈ 𝐵} ∧ ∀𝑦 ∈ {𝑥 ∈ ℂ ∣ (𝑥 − 𝐴) ∈ 𝐵} ((𝐹 shift 𝐴)‘𝑦) ∈ 𝐶)) | |
20 | 4, 18, 19 | sylanbrc 415 | 1 ⊢ ((𝐹:𝐵⟶𝐶 ∧ 𝐴 ∈ ℂ) → (𝐹 shift 𝐴):{𝑥 ∈ ℂ ∣ (𝑥 − 𝐴) ∈ 𝐵}⟶𝐶) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 = wceq 1348 ∈ wcel 2141 ∀wral 2448 {crab 2452 Vcvv 2730 Fn wfn 5193 ⟶wf 5194 ‘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: (None) |
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