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| Mirrors > Home > MPE Home > Th. List > Mathboxes > signshf | Structured version Visualization version GIF version | ||
| Description: 𝐻, corresponding to the word 𝐹 multiplied by (𝑥 − 𝐶), as a function. (Contributed by Thierry Arnoux, 29-Sep-2018.) |
| Ref | Expression |
|---|---|
| signsv.p | ⊢ ⨣ = (𝑎 ∈ {-1, 0, 1}, 𝑏 ∈ {-1, 0, 1} ↦ if(𝑏 = 0, 𝑎, 𝑏)) |
| signsv.w | ⊢ 𝑊 = {〈(Base‘ndx), {-1, 0, 1}〉, 〈(+g‘ndx), ⨣ 〉} |
| signsv.t | ⊢ 𝑇 = (𝑓 ∈ Word ℝ ↦ (𝑛 ∈ (0..^(♯‘𝑓)) ↦ (𝑊 Σg (𝑖 ∈ (0...𝑛) ↦ (sgn‘(𝑓‘𝑖)))))) |
| signsv.v | ⊢ 𝑉 = (𝑓 ∈ Word ℝ ↦ Σ𝑗 ∈ (1..^(♯‘𝑓))if(((𝑇‘𝑓)‘𝑗) ≠ ((𝑇‘𝑓)‘(𝑗 − 1)), 1, 0)) |
| signs.h | ⊢ 𝐻 = ((〈“0”〉 ++ 𝐹) ∘f − ((𝐹 ++ 〈“0”〉) ∘f/c · 𝐶)) |
| Ref | Expression |
|---|---|
| signshf | ⊢ ((𝐹 ∈ Word ℝ ∧ 𝐶 ∈ ℝ+) → 𝐻:(0..^((♯‘𝐹) + 1))⟶ℝ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | resubcl 11486 | . . . 4 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (𝑥 − 𝑦) ∈ ℝ) | |
| 2 | 1 | adantl 481 | . . 3 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝐶 ∈ ℝ+) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → (𝑥 − 𝑦) ∈ ℝ) |
| 3 | 0re 11176 | . . . . . . . 8 ⊢ 0 ∈ ℝ | |
| 4 | s1cl 14567 | . . . . . . . 8 ⊢ (0 ∈ ℝ → 〈“0”〉 ∈ Word ℝ) | |
| 5 | 3, 4 | ax-mp 5 | . . . . . . 7 ⊢ 〈“0”〉 ∈ Word ℝ |
| 6 | ccatcl 14539 | . . . . . . 7 ⊢ ((〈“0”〉 ∈ Word ℝ ∧ 𝐹 ∈ Word ℝ) → (〈“0”〉 ++ 𝐹) ∈ Word ℝ) | |
| 7 | 5, 6 | mpan 690 | . . . . . 6 ⊢ (𝐹 ∈ Word ℝ → (〈“0”〉 ++ 𝐹) ∈ Word ℝ) |
| 8 | wrdf 14483 | . . . . . 6 ⊢ ((〈“0”〉 ++ 𝐹) ∈ Word ℝ → (〈“0”〉 ++ 𝐹):(0..^(♯‘(〈“0”〉 ++ 𝐹)))⟶ℝ) | |
| 9 | 7, 8 | syl 17 | . . . . 5 ⊢ (𝐹 ∈ Word ℝ → (〈“0”〉 ++ 𝐹):(0..^(♯‘(〈“0”〉 ++ 𝐹)))⟶ℝ) |
| 10 | 1cnd 11169 | . . . . . . . 8 ⊢ (𝐹 ∈ Word ℝ → 1 ∈ ℂ) | |
| 11 | lencl 14498 | . . . . . . . . 9 ⊢ (𝐹 ∈ Word ℝ → (♯‘𝐹) ∈ ℕ0) | |
| 12 | 11 | nn0cnd 12505 | . . . . . . . 8 ⊢ (𝐹 ∈ Word ℝ → (♯‘𝐹) ∈ ℂ) |
| 13 | ccatlen 14540 | . . . . . . . . . 10 ⊢ ((〈“0”〉 ∈ Word ℝ ∧ 𝐹 ∈ Word ℝ) → (♯‘(〈“0”〉 ++ 𝐹)) = ((♯‘〈“0”〉) + (♯‘𝐹))) | |
| 14 | 5, 13 | mpan 690 | . . . . . . . . 9 ⊢ (𝐹 ∈ Word ℝ → (♯‘(〈“0”〉 ++ 𝐹)) = ((♯‘〈“0”〉) + (♯‘𝐹))) |
| 15 | s1len 14571 | . . . . . . . . . 10 ⊢ (♯‘〈“0”〉) = 1 | |
| 16 | 15 | oveq1i 7397 | . . . . . . . . 9 ⊢ ((♯‘〈“0”〉) + (♯‘𝐹)) = (1 + (♯‘𝐹)) |
| 17 | 14, 16 | eqtrdi 2780 | . . . . . . . 8 ⊢ (𝐹 ∈ Word ℝ → (♯‘(〈“0”〉 ++ 𝐹)) = (1 + (♯‘𝐹))) |
| 18 | 10, 12, 17 | comraddd 11388 | . . . . . . 7 ⊢ (𝐹 ∈ Word ℝ → (♯‘(〈“0”〉 ++ 𝐹)) = ((♯‘𝐹) + 1)) |
| 19 | 18 | oveq2d 7403 | . . . . . 6 ⊢ (𝐹 ∈ Word ℝ → (0..^(♯‘(〈“0”〉 ++ 𝐹))) = (0..^((♯‘𝐹) + 1))) |
| 20 | 19 | feq2d 6672 | . . . . 5 ⊢ (𝐹 ∈ Word ℝ → ((〈“0”〉 ++ 𝐹):(0..^(♯‘(〈“0”〉 ++ 𝐹)))⟶ℝ ↔ (〈“0”〉 ++ 𝐹):(0..^((♯‘𝐹) + 1))⟶ℝ)) |
| 21 | 9, 20 | mpbid 232 | . . . 4 ⊢ (𝐹 ∈ Word ℝ → (〈“0”〉 ++ 𝐹):(0..^((♯‘𝐹) + 1))⟶ℝ) |
| 22 | 21 | adantr 480 | . . 3 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝐶 ∈ ℝ+) → (〈“0”〉 ++ 𝐹):(0..^((♯‘𝐹) + 1))⟶ℝ) |
| 23 | remulcl 11153 | . . . . 5 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (𝑥 · 𝑦) ∈ ℝ) | |
| 24 | 23 | adantl 481 | . . . 4 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝐶 ∈ ℝ+) ∧ (𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ)) → (𝑥 · 𝑦) ∈ ℝ) |
| 25 | ccatcl 14539 | . . . . . . . 8 ⊢ ((𝐹 ∈ Word ℝ ∧ 〈“0”〉 ∈ Word ℝ) → (𝐹 ++ 〈“0”〉) ∈ Word ℝ) | |
| 26 | 5, 25 | mpan2 691 | . . . . . . 7 ⊢ (𝐹 ∈ Word ℝ → (𝐹 ++ 〈“0”〉) ∈ Word ℝ) |
| 27 | wrdf 14483 | . . . . . . 7 ⊢ ((𝐹 ++ 〈“0”〉) ∈ Word ℝ → (𝐹 ++ 〈“0”〉):(0..^(♯‘(𝐹 ++ 〈“0”〉)))⟶ℝ) | |
| 28 | 26, 27 | syl 17 | . . . . . 6 ⊢ (𝐹 ∈ Word ℝ → (𝐹 ++ 〈“0”〉):(0..^(♯‘(𝐹 ++ 〈“0”〉)))⟶ℝ) |
| 29 | ccatws1len 14585 | . . . . . . . 8 ⊢ (𝐹 ∈ Word ℝ → (♯‘(𝐹 ++ 〈“0”〉)) = ((♯‘𝐹) + 1)) | |
| 30 | 29 | oveq2d 7403 | . . . . . . 7 ⊢ (𝐹 ∈ Word ℝ → (0..^(♯‘(𝐹 ++ 〈“0”〉))) = (0..^((♯‘𝐹) + 1))) |
| 31 | 30 | feq2d 6672 | . . . . . 6 ⊢ (𝐹 ∈ Word ℝ → ((𝐹 ++ 〈“0”〉):(0..^(♯‘(𝐹 ++ 〈“0”〉)))⟶ℝ ↔ (𝐹 ++ 〈“0”〉):(0..^((♯‘𝐹) + 1))⟶ℝ)) |
| 32 | 28, 31 | mpbid 232 | . . . . 5 ⊢ (𝐹 ∈ Word ℝ → (𝐹 ++ 〈“0”〉):(0..^((♯‘𝐹) + 1))⟶ℝ) |
| 33 | 32 | adantr 480 | . . . 4 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝐶 ∈ ℝ+) → (𝐹 ++ 〈“0”〉):(0..^((♯‘𝐹) + 1))⟶ℝ) |
| 34 | ovexd 7422 | . . . 4 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝐶 ∈ ℝ+) → (0..^((♯‘𝐹) + 1)) ∈ V) | |
| 35 | rpre 12960 | . . . . 5 ⊢ (𝐶 ∈ ℝ+ → 𝐶 ∈ ℝ) | |
| 36 | 35 | adantl 481 | . . . 4 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝐶 ∈ ℝ+) → 𝐶 ∈ ℝ) |
| 37 | 24, 33, 34, 36 | ofcf 34093 | . . 3 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝐶 ∈ ℝ+) → ((𝐹 ++ 〈“0”〉) ∘f/c · 𝐶):(0..^((♯‘𝐹) + 1))⟶ℝ) |
| 38 | inidm 4190 | . . 3 ⊢ ((0..^((♯‘𝐹) + 1)) ∩ (0..^((♯‘𝐹) + 1))) = (0..^((♯‘𝐹) + 1)) | |
| 39 | 2, 22, 37, 34, 34, 38 | off 7671 | . 2 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝐶 ∈ ℝ+) → ((〈“0”〉 ++ 𝐹) ∘f − ((𝐹 ++ 〈“0”〉) ∘f/c · 𝐶)):(0..^((♯‘𝐹) + 1))⟶ℝ) |
| 40 | signs.h | . . 3 ⊢ 𝐻 = ((〈“0”〉 ++ 𝐹) ∘f − ((𝐹 ++ 〈“0”〉) ∘f/c · 𝐶)) | |
| 41 | 40 | feq1i 6679 | . 2 ⊢ (𝐻:(0..^((♯‘𝐹) + 1))⟶ℝ ↔ ((〈“0”〉 ++ 𝐹) ∘f − ((𝐹 ++ 〈“0”〉) ∘f/c · 𝐶)):(0..^((♯‘𝐹) + 1))⟶ℝ) |
| 42 | 39, 41 | sylibr 234 | 1 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝐶 ∈ ℝ+) → 𝐻:(0..^((♯‘𝐹) + 1))⟶ℝ) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2109 ≠ wne 2925 Vcvv 3447 ifcif 4488 {cpr 4591 {ctp 4593 〈cop 4595 ↦ cmpt 5188 ⟶wf 6507 ‘cfv 6511 (class class class)co 7387 ∈ cmpo 7389 ∘f cof 7651 ℝcr 11067 0cc0 11068 1c1 11069 + caddc 11071 · cmul 11073 − cmin 11405 -cneg 11406 ℝ+crp 12951 ...cfz 13468 ..^cfzo 13615 ♯chash 14295 Word cword 14478 ++ cconcat 14535 〈“cs1 14560 sgncsgn 15052 Σcsu 15652 ndxcnx 17163 Basecbs 17179 +gcplusg 17220 Σg cgsu 17403 ∘f/c cofc 34085 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5234 ax-sep 5251 ax-nul 5261 ax-pow 5320 ax-pr 5387 ax-un 7711 ax-cnex 11124 ax-resscn 11125 ax-1cn 11126 ax-icn 11127 ax-addcl 11128 ax-addrcl 11129 ax-mulcl 11130 ax-mulrcl 11131 ax-mulcom 11132 ax-addass 11133 ax-mulass 11134 ax-distr 11135 ax-i2m1 11136 ax-1ne0 11137 ax-1rid 11138 ax-rnegex 11139 ax-rrecex 11140 ax-cnre 11141 ax-pre-lttri 11142 ax-pre-lttrn 11143 ax-pre-ltadd 11144 ax-pre-mulgt0 11145 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-reu 3355 df-rab 3406 df-v 3449 df-sbc 3754 df-csb 3863 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-pss 3934 df-nul 4297 df-if 4489 df-pw 4565 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4872 df-int 4911 df-iun 4957 df-br 5108 df-opab 5170 df-mpt 5189 df-tr 5215 df-id 5533 df-eprel 5538 df-po 5546 df-so 5547 df-fr 5591 df-we 5593 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-res 5650 df-ima 5651 df-pred 6274 df-ord 6335 df-on 6336 df-lim 6337 df-suc 6338 df-iota 6464 df-fun 6513 df-fn 6514 df-f 6515 df-f1 6516 df-fo 6517 df-f1o 6518 df-fv 6519 df-riota 7344 df-ov 7390 df-oprab 7391 df-mpo 7392 df-of 7653 df-om 7843 df-1st 7968 df-2nd 7969 df-frecs 8260 df-wrecs 8291 df-recs 8340 df-rdg 8378 df-1o 8434 df-er 8671 df-en 8919 df-dom 8920 df-sdom 8921 df-fin 8922 df-card 9892 df-pnf 11210 df-mnf 11211 df-xr 11212 df-ltxr 11213 df-le 11214 df-sub 11407 df-neg 11408 df-nn 12187 df-n0 12443 df-z 12530 df-uz 12794 df-rp 12952 df-fz 13469 df-fzo 13616 df-hash 14296 df-word 14479 df-concat 14536 df-s1 14561 df-ofc 34086 |
| This theorem is referenced by: signshwrd 34580 signshlen 34581 |
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