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Mirrors > Home > MPE Home > Th. List > shftf | Structured version Visualization version 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 6545 | . . 3 ⊢ (𝐹:𝐵⟶𝐶 → 𝐹 Fn 𝐵) | |
2 | shftfval.1 | . . . 4 ⊢ 𝐹 ∈ V | |
3 | 2 | shftfn 14636 | . . 3 ⊢ ((𝐹 Fn 𝐵 ∧ 𝐴 ∈ ℂ) → (𝐹 shift 𝐴) Fn {𝑥 ∈ ℂ ∣ (𝑥 − 𝐴) ∈ 𝐵}) |
4 | 1, 3 | sylan 583 | . 2 ⊢ ((𝐹:𝐵⟶𝐶 ∧ 𝐴 ∈ ℂ) → (𝐹 shift 𝐴) Fn {𝑥 ∈ ℂ ∣ (𝑥 − 𝐴) ∈ 𝐵}) |
5 | oveq1 7220 | . . . . . 6 ⊢ (𝑥 = 𝑦 → (𝑥 − 𝐴) = (𝑦 − 𝐴)) | |
6 | 5 | eleq1d 2822 | . . . . 5 ⊢ (𝑥 = 𝑦 → ((𝑥 − 𝐴) ∈ 𝐵 ↔ (𝑦 − 𝐴) ∈ 𝐵)) |
7 | 6 | elrab 3602 | . . . 4 ⊢ (𝑦 ∈ {𝑥 ∈ ℂ ∣ (𝑥 − 𝐴) ∈ 𝐵} ↔ (𝑦 ∈ ℂ ∧ (𝑦 − 𝐴) ∈ 𝐵)) |
8 | simpr 488 | . . . . . 6 ⊢ ((𝐹:𝐵⟶𝐶 ∧ 𝐴 ∈ ℂ) → 𝐴 ∈ ℂ) | |
9 | simpl 486 | . . . . . 6 ⊢ ((𝑦 ∈ ℂ ∧ (𝑦 − 𝐴) ∈ 𝐵) → 𝑦 ∈ ℂ) | |
10 | 2 | shftval 14637 | . . . . . 6 ⊢ ((𝐴 ∈ ℂ ∧ 𝑦 ∈ ℂ) → ((𝐹 shift 𝐴)‘𝑦) = (𝐹‘(𝑦 − 𝐴))) |
11 | 8, 9, 10 | syl2an 599 | . . . . 5 ⊢ (((𝐹:𝐵⟶𝐶 ∧ 𝐴 ∈ ℂ) ∧ (𝑦 ∈ ℂ ∧ (𝑦 − 𝐴) ∈ 𝐵)) → ((𝐹 shift 𝐴)‘𝑦) = (𝐹‘(𝑦 − 𝐴))) |
12 | simpl 486 | . . . . . 6 ⊢ ((𝐹:𝐵⟶𝐶 ∧ 𝐴 ∈ ℂ) → 𝐹:𝐵⟶𝐶) | |
13 | simpr 488 | . . . . . 6 ⊢ ((𝑦 ∈ ℂ ∧ (𝑦 − 𝐴) ∈ 𝐵) → (𝑦 − 𝐴) ∈ 𝐵) | |
14 | ffvelrn 6902 | . . . . . 6 ⊢ ((𝐹:𝐵⟶𝐶 ∧ (𝑦 − 𝐴) ∈ 𝐵) → (𝐹‘(𝑦 − 𝐴)) ∈ 𝐶) | |
15 | 12, 13, 14 | syl2an 599 | . . . . 5 ⊢ (((𝐹:𝐵⟶𝐶 ∧ 𝐴 ∈ ℂ) ∧ (𝑦 ∈ ℂ ∧ (𝑦 − 𝐴) ∈ 𝐵)) → (𝐹‘(𝑦 − 𝐴)) ∈ 𝐶) |
16 | 11, 15 | eqeltrd 2838 | . . . 4 ⊢ (((𝐹:𝐵⟶𝐶 ∧ 𝐴 ∈ ℂ) ∧ (𝑦 ∈ ℂ ∧ (𝑦 − 𝐴) ∈ 𝐵)) → ((𝐹 shift 𝐴)‘𝑦) ∈ 𝐶) |
17 | 7, 16 | sylan2b 597 | . . 3 ⊢ (((𝐹:𝐵⟶𝐶 ∧ 𝐴 ∈ ℂ) ∧ 𝑦 ∈ {𝑥 ∈ ℂ ∣ (𝑥 − 𝐴) ∈ 𝐵}) → ((𝐹 shift 𝐴)‘𝑦) ∈ 𝐶) |
18 | 17 | ralrimiva 3105 | . 2 ⊢ ((𝐹:𝐵⟶𝐶 ∧ 𝐴 ∈ ℂ) → ∀𝑦 ∈ {𝑥 ∈ ℂ ∣ (𝑥 − 𝐴) ∈ 𝐵} ((𝐹 shift 𝐴)‘𝑦) ∈ 𝐶) |
19 | ffnfv 6935 | . 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 586 | 1 ⊢ ((𝐹:𝐵⟶𝐶 ∧ 𝐴 ∈ ℂ) → (𝐹 shift 𝐴):{𝑥 ∈ ℂ ∣ (𝑥 − 𝐴) ∈ 𝐵}⟶𝐶) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 = wceq 1543 ∈ wcel 2110 ∀wral 3061 {crab 3065 Vcvv 3408 Fn wfn 6375 ⟶wf 6376 ‘cfv 6380 (class class class)co 7213 ℂcc 10727 − cmin 11062 shift cshi 14629 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2708 ax-rep 5179 ax-sep 5192 ax-nul 5199 ax-pow 5258 ax-pr 5322 ax-un 7523 ax-resscn 10786 ax-1cn 10787 ax-icn 10788 ax-addcl 10789 ax-addrcl 10790 ax-mulcl 10791 ax-mulrcl 10792 ax-mulcom 10793 ax-addass 10794 ax-mulass 10795 ax-distr 10796 ax-i2m1 10797 ax-1ne0 10798 ax-1rid 10799 ax-rnegex 10800 ax-rrecex 10801 ax-cnre 10802 ax-pre-lttri 10803 ax-pre-lttrn 10804 ax-pre-ltadd 10805 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2071 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2886 df-ne 2941 df-nel 3047 df-ral 3066 df-rex 3067 df-reu 3068 df-rab 3070 df-v 3410 df-sbc 3695 df-csb 3812 df-dif 3869 df-un 3871 df-in 3873 df-ss 3883 df-nul 4238 df-if 4440 df-pw 4515 df-sn 4542 df-pr 4544 df-op 4548 df-uni 4820 df-iun 4906 df-br 5054 df-opab 5116 df-mpt 5136 df-id 5455 df-po 5468 df-so 5469 df-xp 5557 df-rel 5558 df-cnv 5559 df-co 5560 df-dm 5561 df-rn 5562 df-res 5563 df-ima 5564 df-iota 6338 df-fun 6382 df-fn 6383 df-f 6384 df-f1 6385 df-fo 6386 df-f1o 6387 df-fv 6388 df-riota 7170 df-ov 7216 df-oprab 7217 df-mpo 7218 df-er 8391 df-en 8627 df-dom 8628 df-sdom 8629 df-pnf 10869 df-mnf 10870 df-ltxr 10872 df-sub 11064 df-shft 14630 |
This theorem is referenced by: (None) |
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