| Mathbox for Thierry Arnoux |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > signstf | Structured version Visualization version GIF version | ||
| Description: The zero skipping sign word is a word. (Contributed by Thierry Arnoux, 8-Oct-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)) |
| Ref | Expression |
|---|---|
| signstf | ⊢ (𝐹 ∈ Word ℝ → (𝑇‘𝐹) ∈ Word ℝ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | signsv.p | . . . 4 ⊢ ⨣ = (𝑎 ∈ {-1, 0, 1}, 𝑏 ∈ {-1, 0, 1} ↦ if(𝑏 = 0, 𝑎, 𝑏)) | |
| 2 | signsv.w | . . . 4 ⊢ 𝑊 = {〈(Base‘ndx), {-1, 0, 1}〉, 〈(+g‘ndx), ⨣ 〉} | |
| 3 | signsv.t | . . . 4 ⊢ 𝑇 = (𝑓 ∈ Word ℝ ↦ (𝑛 ∈ (0..^(♯‘𝑓)) ↦ (𝑊 Σg (𝑖 ∈ (0...𝑛) ↦ (sgn‘(𝑓‘𝑖)))))) | |
| 4 | signsv.v | . . . 4 ⊢ 𝑉 = (𝑓 ∈ Word ℝ ↦ Σ𝑗 ∈ (1..^(♯‘𝑓))if(((𝑇‘𝑓)‘𝑗) ≠ ((𝑇‘𝑓)‘(𝑗 − 1)), 1, 0)) | |
| 5 | 1, 2, 3, 4 | signstfv 34754 | . . 3 ⊢ (𝐹 ∈ Word ℝ → (𝑇‘𝐹) = (𝑛 ∈ (0..^(♯‘𝐹)) ↦ (𝑊 Σg (𝑖 ∈ (0...𝑛) ↦ (sgn‘(𝐹‘𝑖)))))) |
| 6 | neg1rr 12143 | . . . . 5 ⊢ -1 ∈ ℝ | |
| 7 | 0re 11144 | . . . . 5 ⊢ 0 ∈ ℝ | |
| 8 | 1re 11142 | . . . . 5 ⊢ 1 ∈ ℝ | |
| 9 | tpssi 4776 | . . . . 5 ⊢ ((-1 ∈ ℝ ∧ 0 ∈ ℝ ∧ 1 ∈ ℝ) → {-1, 0, 1} ⊆ ℝ) | |
| 10 | 6, 7, 8, 9 | mp3an 1469 | . . . 4 ⊢ {-1, 0, 1} ⊆ ℝ |
| 11 | 1, 2 | signswbase 34745 | . . . . 5 ⊢ {-1, 0, 1} = (Base‘𝑊) |
| 12 | 1, 2 | signswmnd 34748 | . . . . . 6 ⊢ 𝑊 ∈ Mnd |
| 13 | 12 | a1i 11 | . . . . 5 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) → 𝑊 ∈ Mnd) |
| 14 | fzo0ssnn0 13699 | . . . . . . . 8 ⊢ (0..^(♯‘𝐹)) ⊆ ℕ0 | |
| 15 | nn0uz 12824 | . . . . . . . 8 ⊢ ℕ0 = (ℤ≥‘0) | |
| 16 | 14, 15 | sseqtri 3970 | . . . . . . 7 ⊢ (0..^(♯‘𝐹)) ⊆ (ℤ≥‘0) |
| 17 | 16 | a1i 11 | . . . . . 6 ⊢ (𝐹 ∈ Word ℝ → (0..^(♯‘𝐹)) ⊆ (ℤ≥‘0)) |
| 18 | 17 | sselda 3922 | . . . . 5 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) → 𝑛 ∈ (ℤ≥‘0)) |
| 19 | wrdf 14478 | . . . . . . . . 9 ⊢ (𝐹 ∈ Word ℝ → 𝐹:(0..^(♯‘𝐹))⟶ℝ) | |
| 20 | 19 | ad2antrr 732 | . . . . . . . 8 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) ∧ 𝑖 ∈ (0...𝑛)) → 𝐹:(0..^(♯‘𝐹))⟶ℝ) |
| 21 | fzssfzo 34730 | . . . . . . . . . 10 ⊢ (𝑛 ∈ (0..^(♯‘𝐹)) → (0...𝑛) ⊆ (0..^(♯‘𝐹))) | |
| 22 | 21 | adantl 482 | . . . . . . . . 9 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) → (0...𝑛) ⊆ (0..^(♯‘𝐹))) |
| 23 | 22 | sselda 3922 | . . . . . . . 8 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) ∧ 𝑖 ∈ (0...𝑛)) → 𝑖 ∈ (0..^(♯‘𝐹))) |
| 24 | 20, 23 | ffvelcdmd 7033 | . . . . . . 7 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) ∧ 𝑖 ∈ (0...𝑛)) → (𝐹‘𝑖) ∈ ℝ) |
| 25 | 24 | rexrd 11193 | . . . . . 6 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) ∧ 𝑖 ∈ (0...𝑛)) → (𝐹‘𝑖) ∈ ℝ*) |
| 26 | sgncl 32930 | . . . . . 6 ⊢ ((𝐹‘𝑖) ∈ ℝ* → (sgn‘(𝐹‘𝑖)) ∈ {-1, 0, 1}) | |
| 27 | 25, 26 | syl 17 | . . . . 5 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) ∧ 𝑖 ∈ (0...𝑛)) → (sgn‘(𝐹‘𝑖)) ∈ {-1, 0, 1}) |
| 28 | 11, 13, 18, 27 | gsumncl 34731 | . . . 4 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) → (𝑊 Σg (𝑖 ∈ (0...𝑛) ↦ (sgn‘(𝐹‘𝑖)))) ∈ {-1, 0, 1}) |
| 29 | 10, 28 | sselid 3920 | . . 3 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) → (𝑊 Σg (𝑖 ∈ (0...𝑛) ↦ (sgn‘(𝐹‘𝑖)))) ∈ ℝ) |
| 30 | 5, 29 | fmpt3d 7064 | . 2 ⊢ (𝐹 ∈ Word ℝ → (𝑇‘𝐹):(0..^(♯‘𝐹))⟶ℝ) |
| 31 | iswrdi 14477 | . 2 ⊢ ((𝑇‘𝐹):(0..^(♯‘𝐹))⟶ℝ → (𝑇‘𝐹) ∈ Word ℝ) | |
| 32 | 30, 31 | syl 17 | 1 ⊢ (𝐹 ∈ Word ℝ → (𝑇‘𝐹) ∈ Word ℝ) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 396 = wceq 1547 ∈ wcel 2119 ≠ wne 2935 ⊆ wss 3890 ifcif 4461 {cpr 4564 {ctp 4566 〈cop 4568 ↦ cmpt 5160 ⟶wf 6488 ‘cfv 6492 (class class class)co 7363 ∈ cmpo 7365 ℝcr 11035 0cc0 11036 1c1 11037 ℝ*cxr 11176 − cmin 11375 -cneg 11376 ℕ0cn0 12435 ℤ≥cuz 12786 ...cfz 13459 ..^cfzo 13606 ♯chash 14290 Word cword 14473 sgncsgn 15046 Σcsu 15646 ndxcnx 17161 Basecbs 17177 +gcplusg 17218 Σg cgsu 17401 Mndcmnd 18700 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2712 ax-rep 5206 ax-sep 5225 ax-nul 5235 ax-pow 5301 ax-pr 5369 ax-un 7685 ax-cnex 11092 ax-resscn 11093 ax-1cn 11094 ax-icn 11095 ax-addcl 11096 ax-addrcl 11097 ax-mulcl 11098 ax-mulrcl 11099 ax-mulcom 11100 ax-addass 11101 ax-mulass 11102 ax-distr 11103 ax-i2m1 11104 ax-1ne0 11105 ax-1rid 11106 ax-rnegex 11107 ax-rrecex 11108 ax-cnre 11109 ax-pre-lttri 11110 ax-pre-lttrn 11111 ax-pre-ltadd 11112 ax-pre-mulgt0 11113 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2719 df-cleq 2732 df-clel 2815 df-nfc 2889 df-ne 2936 df-nel 3040 df-ral 3055 df-rex 3065 df-rmo 3345 df-reu 3346 df-rab 3393 df-v 3434 df-sbc 3731 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4269 df-if 4462 df-pw 4538 df-sn 4563 df-pr 4565 df-tp 4567 df-op 4569 df-uni 4846 df-int 4885 df-iun 4930 df-br 5080 df-opab 5142 df-mpt 5161 df-tr 5187 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6259 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-riota 7320 df-ov 7366 df-oprab 7367 df-mpo 7368 df-om 7814 df-1st 7938 df-2nd 7939 df-frecs 8228 df-wrecs 8259 df-recs 8308 df-rdg 8346 df-1o 8402 df-er 8640 df-en 8891 df-dom 8892 df-sdom 8893 df-fin 8894 df-card 9861 df-pnf 11179 df-mnf 11180 df-xr 11181 df-ltxr 11182 df-le 11183 df-sub 11377 df-neg 11378 df-nn 12173 df-2 12242 df-n0 12436 df-z 12523 df-uz 12787 df-fz 13460 df-fzo 13607 df-seq 13962 df-hash 14291 df-word 14474 df-sgn 15047 df-struct 17115 df-slot 17150 df-ndx 17162 df-base 17178 df-plusg 17231 df-0g 17402 df-gsum 17403 df-mgm 18606 df-sgrp 18685 df-mnd 18701 |
| This theorem is referenced by: signstres 34766 signsvtp 34774 signsvtn 34775 |
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