| 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 35296 | . . 3 ⊢ (𝐹 ∈ Word ℝ → (𝑇‘𝐹) = (𝑛 ∈ (0..^(♯‘𝐹)) ↦ (𝑊 Σg (𝑖 ∈ (0...𝑛) ↦ (sgn‘(𝐹‘𝑖)))))) |
| 6 | neg1rr 12344 | . . . . 5 ⊢ -1 ∈ ℝ | |
| 7 | 0re 11347 | . . . . 5 ⊢ 0 ∈ ℝ | |
| 8 | 1re 11345 | . . . . 5 ⊢ 1 ∈ ℝ | |
| 9 | tpssi 4796 | . . . . 5 ⊢ (( -1 ∈ ℝ ∧ 0 ∈ ℝ ∧ 1 ∈ ℝ) → { -1, 0, 1} ⊆ ℝ) | |
| 10 | 6, 7, 8, 9 | mp3an 1491 | . . . 4 ⊢ { -1, 0, 1} ⊆ ℝ |
| 11 | 1, 2 | signswbase 35287 | . . . . 5 ⊢ { -1, 0, 1} = (Base‘𝑊) |
| 12 | 1, 2 | signswmnd 35290 | . . . . . 6 ⊢ 𝑊 ∈ Mnd |
| 13 | 12 | a1i 11 | . . . . 5 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) → 𝑊 ∈ Mnd) |
| 14 | fzo0ssnn0 13919 | . . . . . . . 8 ⊢ (0..^(♯‘𝐹)) ⊆ ℕ0 | |
| 15 | nn0uz 13041 | . . . . . . . 8 ⊢ ℕ0 = (ℤ≥‘0) | |
| 16 | 14, 15 | sseqtri 3961 | . . . . . . 7 ⊢ (0..^(♯‘𝐹)) ⊆ (ℤ≥‘0) |
| 17 | 16 | a1i 11 | . . . . . 6 ⊢ (𝐹 ∈ Word ℝ → (0..^(♯‘𝐹)) ⊆ (ℤ≥‘0)) |
| 18 | 17 | sselda 3913 | . . . . 5 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) → 𝑛 ∈ (ℤ≥‘0)) |
| 19 | wrdf 14702 | . . . . . . . . 9 ⊢ (𝐹 ∈ Word ℝ → 𝐹:(0..^(♯‘𝐹))⟶ℝ) | |
| 20 | 19 | ad2antrr 739 | . . . . . . . 8 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) ∧ 𝑖 ∈ (0...𝑛)) → 𝐹:(0..^(♯‘𝐹))⟶ℝ) |
| 21 | fzssfzo 35275 | . . . . . . . . . 10 ⊢ (𝑛 ∈ (0..^(♯‘𝐹)) → (0...𝑛) ⊆ (0..^(♯‘𝐹))) | |
| 22 | 21 | adantl 487 | . . . . . . . . 9 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) → (0...𝑛) ⊆ (0..^(♯‘𝐹))) |
| 23 | 22 | sselda 3913 | . . . . . . . 8 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) ∧ 𝑖 ∈ (0...𝑛)) → 𝑖 ∈ (0..^(♯‘𝐹))) |
| 24 | 20, 23 | ffvelcdmd 7115 | . . . . . . 7 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) ∧ 𝑖 ∈ (0...𝑛)) → (𝐹‘𝑖) ∈ ℝ) |
| 25 | 24 | rexrd 11396 | . . . . . 6 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) ∧ 𝑖 ∈ (0...𝑛)) → (𝐹‘𝑖) ∈ ℝ*) |
| 26 | sgncl 15291 | . . . . . 6 ⊢ ((𝐹‘𝑖) ∈ ℝ* → (sgn‘(𝐹‘𝑖)) ∈ { -1, 0, 1}) | |
| 27 | 25, 26 | syl 18 | . . . . 5 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) ∧ 𝑖 ∈ (0...𝑛)) → (sgn‘(𝐹‘𝑖)) ∈ { -1, 0, 1}) |
| 28 | 11, 13, 18, 27 | gsumncl 35276 | . . . 4 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) → (𝑊 Σg (𝑖 ∈ (0...𝑛) ↦ (sgn‘(𝐹‘𝑖)))) ∈ { -1, 0, 1}) |
| 29 | 10, 28 | sselid 3911 | . . 3 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) → (𝑊 Σg (𝑖 ∈ (0...𝑛) ↦ (sgn‘(𝐹‘𝑖)))) ∈ ℝ) |
| 30 | 5, 29 | fmpt3d 7146 | . 2 ⊢ (𝐹 ∈ Word ℝ → (𝑇‘𝐹):(0..^(♯‘𝐹))⟶ℝ) |
| 31 | iswrdi 14701 | . 2 ⊢ ((𝑇‘𝐹):(0..^(♯‘𝐹))⟶ℝ → (𝑇‘𝐹) ∈ Word ℝ) | |
| 32 | 30, 31 | syl 18 | 1 ⊢ (𝐹 ∈ Word ℝ → (𝑇‘𝐹) ∈ Word ℝ) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2147 ≠ wne 2959 ⊆ wss 3900 ifcif 4485 {cpr 4590 {ctp 4592 〈cop 4838 ↦ cmpt 5190 ⟶wf 6560 ‘cfv 6564 (class class class)co 7449 ∈ cmpo 7451 ℝcr 11236 0cc0 11237 1c1 11238 ℝ*cxr 11379 − cmin 11578 -cneg 11579 ℕ0cn0 12644 ℤ≥cuz 13003 ...cfz 13677 ..^cfzo 13826 ♯chash 14513 Word cword 14697 sgncsgn 15280 Σcsu 15894 ndxcnx 17412 Basecbs 17428 +gcplusg 17469 Σg cgsu 17652 Mndcmnd 18964 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-rep 5236 ax-sep 5253 ax-nul 5264 ax-pow 5332 ax-pr 5396 ax-un 7781 ax-cnex 11293 ax-resscn 11294 ax-1cn 11295 ax-icn 11296 ax-addcl 11297 ax-addrcl 11298 ax-mulcl 11299 ax-mulrcl 11300 ax-mulcom 11301 ax-addass 11302 ax-mulass 11303 ax-distr 11304 ax-i2m1 11305 ax-1ne0 11306 ax-1rid 11307 ax-rnegex 11308 ax-rrecex 11309 ax-cnre 11310 ax-pre-lttri 11311 ax-pre-lttrn 11312 ax-pre-ltadd 11313 ax-pre-mulgt0 11314 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-tp 4593 df-op 4839 df-uni 4871 df-int 4911 df-iun 4956 df-br 5107 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5551 df-eprel 5556 df-po 5564 df-so 5565 df-fr 5609 df-we 5611 df-xp 5662 df-rel 5663 df-cnv 5664 df-co 5665 df-dm 5666 df-rn 5667 df-res 5668 df-ima 5669 df-pred 6328 df-ord 6389 df-on 6390 df-lim 6391 df-suc 6392 df-iota 6518 df-fun 6566 df-fn 6567 df-f 6568 df-f1 6569 df-fo 6570 df-f1o 6571 df-fv 6572 df-riota 7406 df-ov 7452 df-oprab 7453 df-mpo 7454 df-om 7910 df-1st 8033 df-2nd 8034 df-frecs 8335 df-wrecs 8366 df-recs 8415 df-rdg 8454 df-1o 8512 df-er 8753 df-en 9010 df-dom 9011 df-sdom 9012 df-fin 9013 df-card 10055 df-pnf 11382 df-mnf 11383 df-xr 11384 df-ltxr 11385 df-le 11386 df-sub 11580 df-neg 11581 df-nn 12374 df-2 12443 df-n0 12645 df-z 12732 df-uz 13004 df-fz 13678 df-fzo 13827 df-seq 14183 df-hash 14514 df-word 14698 df-sgn 15281 df-struct 17366 df-slot 17401 df-ndx 17413 df-base 17429 df-plusg 17482 df-0g 17653 df-gsum 17654 df-mgm 18857 df-sgrp 18949 df-mnd 18965 |
| This theorem is used by: signstres 35308 signsvtp 35316 signsvtn 35317 |
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