| 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 34862 | . . 3 ⊢ (𝐹 ∈ Word ℝ → (𝑇‘𝐹) = (𝑛 ∈ (0..^(♯‘𝐹)) ↦ (𝑊 Σg (𝑖 ∈ (0...𝑛) ↦ (sgn‘(𝐹‘𝑖)))))) |
| 6 | neg1rr 12192 | . . . . 5 ⊢ -1 ∈ ℝ | |
| 7 | 0re 11198 | . . . . 5 ⊢ 0 ∈ ℝ | |
| 8 | 1re 11196 | . . . . 5 ⊢ 1 ∈ ℝ | |
| 9 | tpssi 4798 | . . . . 5 ⊢ ((-1 ∈ ℝ ∧ 0 ∈ ℝ ∧ 1 ∈ ℝ) → {-1, 0, 1} ⊆ ℝ) | |
| 10 | 6, 7, 8, 9 | mp3an 1485 | . . . 4 ⊢ {-1, 0, 1} ⊆ ℝ |
| 11 | 1, 2 | signswbase 34853 | . . . . 5 ⊢ {-1, 0, 1} = (Base‘𝑊) |
| 12 | 1, 2 | signswmnd 34856 | . . . . . 6 ⊢ 𝑊 ∈ Mnd |
| 13 | 12 | a1i 11 | . . . . 5 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) → 𝑊 ∈ Mnd) |
| 14 | fzo0ssnn0 13763 | . . . . . . . 8 ⊢ (0..^(♯‘𝐹)) ⊆ ℕ0 | |
| 15 | nn0uz 12888 | . . . . . . . 8 ⊢ ℕ0 = (ℤ≥‘0) | |
| 16 | 14, 15 | sseqtri 3987 | . . . . . . 7 ⊢ (0..^(♯‘𝐹)) ⊆ (ℤ≥‘0) |
| 17 | 16 | a1i 11 | . . . . . 6 ⊢ (𝐹 ∈ Word ℝ → (0..^(♯‘𝐹)) ⊆ (ℤ≥‘0)) |
| 18 | 17 | sselda 3939 | . . . . 5 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) → 𝑛 ∈ (ℤ≥‘0)) |
| 19 | wrdf 14543 | . . . . . . . . 9 ⊢ (𝐹 ∈ Word ℝ → 𝐹:(0..^(♯‘𝐹))⟶ℝ) | |
| 20 | 19 | ad2antrr 738 | . . . . . . . 8 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) ∧ 𝑖 ∈ (0...𝑛)) → 𝐹:(0..^(♯‘𝐹))⟶ℝ) |
| 21 | fzssfzo 34841 | . . . . . . . . . 10 ⊢ (𝑛 ∈ (0..^(♯‘𝐹)) → (0...𝑛) ⊆ (0..^(♯‘𝐹))) | |
| 22 | 21 | adantl 486 | . . . . . . . . 9 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) → (0...𝑛) ⊆ (0..^(♯‘𝐹))) |
| 23 | 22 | sselda 3939 | . . . . . . . 8 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) ∧ 𝑖 ∈ (0...𝑛)) → 𝑖 ∈ (0..^(♯‘𝐹))) |
| 24 | 20, 23 | ffvelcdmd 7070 | . . . . . . 7 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) ∧ 𝑖 ∈ (0...𝑛)) → (𝐹‘𝑖) ∈ ℝ) |
| 25 | 24 | rexrd 11247 | . . . . . 6 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) ∧ 𝑖 ∈ (0...𝑛)) → (𝐹‘𝑖) ∈ ℝ*) |
| 26 | sgncl 15122 | . . . . . 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 34842 | . . . 4 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) → (𝑊 Σg (𝑖 ∈ (0...𝑛) ↦ (sgn‘(𝐹‘𝑖)))) ∈ {-1, 0, 1}) |
| 29 | 10, 28 | sselid 3937 | . . 3 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) → (𝑊 Σg (𝑖 ∈ (0...𝑛) ↦ (sgn‘(𝐹‘𝑖)))) ∈ ℝ) |
| 30 | 5, 29 | fmpt3d 7101 | . 2 ⊢ (𝐹 ∈ Word ℝ → (𝑇‘𝐹):(0..^(♯‘𝐹))⟶ℝ) |
| 31 | iswrdi 14542 | . 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 |
| Syntax hints: → wi 4 ∧ wa 400 = wceq 1563 ∈ wcel 2145 ≠ wne 2960 ⊆ wss 3907 ifcif 4483 {cpr 4587 {ctp 4589 〈cop 4591 ↦ cmpt 5185 ⟶wf 6521 ‘cfv 6525 (class class class)co 7400 ∈ cmpo 7402 ℝcr 11087 0cc0 11088 1c1 11089 ℝ*cxr 11230 − cmin 11429 -cneg 11430 ℕ0cn0 12492 ℤ≥cuz 12850 ...cfz 13523 ..^cfzo 13670 ♯chash 14354 Word cword 14538 sgncsgn 15111 Σcsu 15725 ndxcnx 17241 Basecbs 17257 +gcplusg 17298 Σg cgsu 17481 Mndcmnd 18780 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2737 ax-rep 5231 ax-sep 5250 ax-nul 5260 ax-pow 5326 ax-pr 5394 ax-un 7722 ax-cnex 11144 ax-resscn 11145 ax-1cn 11146 ax-icn 11147 ax-addcl 11148 ax-addrcl 11149 ax-mulcl 11150 ax-mulrcl 11151 ax-mulcom 11152 ax-addass 11153 ax-mulass 11154 ax-distr 11155 ax-i2m1 11156 ax-1ne0 11157 ax-1rid 11158 ax-rnegex 11159 ax-rrecex 11160 ax-cnre 11161 ax-pre-lttri 11162 ax-pre-lttrn 11163 ax-pre-ltadd 11164 ax-pre-mulgt0 11165 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-nf 1807 df-sb 2094 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3370 df-reu 3371 df-rab 3418 df-v 3459 df-sbc 3748 df-csb 3856 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-pss 3927 df-nul 4289 df-if 4484 df-pw 4560 df-sn 4586 df-pr 4588 df-tp 4590 df-op 4592 df-uni 4868 df-int 4908 df-iun 4953 df-br 5105 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6291 df-ord 6352 df-on 6353 df-lim 6354 df-suc 6355 df-iota 6481 df-fun 6527 df-fn 6528 df-f 6529 df-f1 6530 df-fo 6531 df-f1o 6532 df-fv 6533 df-riota 7357 df-ov 7403 df-oprab 7404 df-mpo 7405 df-om 7851 df-1st 7974 df-2nd 7975 df-frecs 8266 df-wrecs 8297 df-recs 8346 df-rdg 8385 df-1o 8441 df-er 8682 df-en 8932 df-dom 8933 df-sdom 8934 df-fin 8935 df-card 9913 df-pnf 11233 df-mnf 11234 df-xr 11235 df-ltxr 11236 df-le 11237 df-sub 11431 df-neg 11432 df-nn 12222 df-2 12291 df-n0 12493 df-z 12580 df-uz 12851 df-fz 13524 df-fzo 13671 df-seq 14026 df-hash 14355 df-word 14539 df-sgn 15112 df-struct 17195 df-slot 17230 df-ndx 17242 df-base 17258 df-plusg 17311 df-0g 17482 df-gsum 17483 df-mgm 18686 df-sgrp 18765 df-mnd 18781 |
| This theorem is referenced by: signstres 34874 signsvtp 34882 signsvtn 34883 |
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