| 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 34819 | . . 3 ⊢ (𝐹 ∈ Word ℝ → (𝑇‘𝐹) = (𝑛 ∈ (0..^(♯‘𝐹)) ↦ (𝑊 Σg (𝑖 ∈ (0...𝑛) ↦ (sgn‘(𝐹‘𝑖)))))) |
| 6 | neg1rr 12176 | . . . . 5 ⊢ -1 ∈ ℝ | |
| 7 | 0re 11178 | . . . . 5 ⊢ 0 ∈ ℝ | |
| 8 | 1re 11176 | . . . . 5 ⊢ 1 ∈ ℝ | |
| 9 | tpssi 4795 | . . . . 5 ⊢ ((-1 ∈ ℝ ∧ 0 ∈ ℝ ∧ 1 ∈ ℝ) → {-1, 0, 1} ⊆ ℝ) | |
| 10 | 6, 7, 8, 9 | mp3an 1481 | . . . 4 ⊢ {-1, 0, 1} ⊆ ℝ |
| 11 | 1, 2 | signswbase 34810 | . . . . 5 ⊢ {-1, 0, 1} = (Base‘𝑊) |
| 12 | 1, 2 | signswmnd 34813 | . . . . . 6 ⊢ 𝑊 ∈ Mnd |
| 13 | 12 | a1i 11 | . . . . 5 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) → 𝑊 ∈ Mnd) |
| 14 | fzo0ssnn0 13747 | . . . . . . . 8 ⊢ (0..^(♯‘𝐹)) ⊆ ℕ0 | |
| 15 | nn0uz 12872 | . . . . . . . 8 ⊢ ℕ0 = (ℤ≥‘0) | |
| 16 | 14, 15 | sseqtri 3984 | . . . . . . 7 ⊢ (0..^(♯‘𝐹)) ⊆ (ℤ≥‘0) |
| 17 | 16 | a1i 11 | . . . . . 6 ⊢ (𝐹 ∈ Word ℝ → (0..^(♯‘𝐹)) ⊆ (ℤ≥‘0)) |
| 18 | 17 | sselda 3936 | . . . . 5 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) → 𝑛 ∈ (ℤ≥‘0)) |
| 19 | wrdf 14526 | . . . . . . . . 9 ⊢ (𝐹 ∈ Word ℝ → 𝐹:(0..^(♯‘𝐹))⟶ℝ) | |
| 20 | 19 | ad2antrr 736 | . . . . . . . 8 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) ∧ 𝑖 ∈ (0...𝑛)) → 𝐹:(0..^(♯‘𝐹))⟶ℝ) |
| 21 | fzssfzo 34795 | . . . . . . . . . 10 ⊢ (𝑛 ∈ (0..^(♯‘𝐹)) → (0...𝑛) ⊆ (0..^(♯‘𝐹))) | |
| 22 | 21 | adantl 485 | . . . . . . . . 9 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) → (0...𝑛) ⊆ (0..^(♯‘𝐹))) |
| 23 | 22 | sselda 3936 | . . . . . . . 8 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) ∧ 𝑖 ∈ (0...𝑛)) → 𝑖 ∈ (0..^(♯‘𝐹))) |
| 24 | 20, 23 | ffvelcdmd 7060 | . . . . . . 7 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) ∧ 𝑖 ∈ (0...𝑛)) → (𝐹‘𝑖) ∈ ℝ) |
| 25 | 24 | rexrd 11227 | . . . . . 6 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) ∧ 𝑖 ∈ (0...𝑛)) → (𝐹‘𝑖) ∈ ℝ*) |
| 26 | sgncl 32981 | . . . . . 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 34796 | . . . 4 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) → (𝑊 Σg (𝑖 ∈ (0...𝑛) ↦ (sgn‘(𝐹‘𝑖)))) ∈ {-1, 0, 1}) |
| 29 | 10, 28 | sselid 3934 | . . 3 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑛 ∈ (0..^(♯‘𝐹))) → (𝑊 Σg (𝑖 ∈ (0...𝑛) ↦ (sgn‘(𝐹‘𝑖)))) ∈ ℝ) |
| 30 | 5, 29 | fmpt3d 7091 | . 2 ⊢ (𝐹 ∈ Word ℝ → (𝑇‘𝐹):(0..^(♯‘𝐹))⟶ℝ) |
| 31 | iswrdi 14525 | . 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 399 = wceq 1559 ∈ wcel 2141 ≠ wne 2956 ⊆ wss 3904 ifcif 4479 {cpr 4583 {ctp 4585 〈cop 4587 ↦ cmpt 5180 ⟶wf 6511 ‘cfv 6515 (class class class)co 7390 ∈ cmpo 7392 ℝcr 11067 0cc0 11068 1c1 11069 ℝ*cxr 11210 − cmin 11409 -cneg 11410 ℕ0cn0 12476 ℤ≥cuz 12834 ...cfz 13507 ..^cfzo 13654 ♯chash 14338 Word cword 14521 sgncsgn 15094 Σcsu 15694 ndxcnx 17210 Basecbs 17226 +gcplusg 17267 Σg cgsu 17450 Mndcmnd 18749 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-rep 5226 ax-sep 5245 ax-nul 5255 ax-pow 5321 ax-pr 5389 ax-un 7712 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 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3061 df-ral 3076 df-rex 3086 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3745 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4582 df-pr 4584 df-tp 4586 df-op 4588 df-uni 4865 df-int 4905 df-iun 4950 df-br 5100 df-opab 5162 df-mpt 5181 df-tr 5207 df-id 5540 df-eprel 5545 df-po 5553 df-so 5554 df-fr 5598 df-we 5600 df-xp 5651 df-rel 5652 df-cnv 5653 df-co 5654 df-dm 5655 df-rn 5656 df-res 5657 df-ima 5658 df-pred 6282 df-ord 6343 df-on 6344 df-lim 6345 df-suc 6346 df-iota 6471 df-fun 6517 df-fn 6518 df-f 6519 df-f1 6520 df-fo 6521 df-f1o 6522 df-fv 6523 df-riota 7347 df-ov 7393 df-oprab 7394 df-mpo 7395 df-om 7841 df-1st 7964 df-2nd 7965 df-frecs 8255 df-wrecs 8286 df-recs 8335 df-rdg 8374 df-1o 8430 df-er 8671 df-en 8922 df-dom 8923 df-sdom 8924 df-fin 8925 df-card 9892 df-pnf 11213 df-mnf 11214 df-xr 11215 df-ltxr 11216 df-le 11217 df-sub 11411 df-neg 11412 df-nn 12206 df-2 12275 df-n0 12477 df-z 12564 df-uz 12835 df-fz 13508 df-fzo 13655 df-seq 14010 df-hash 14339 df-word 14522 df-sgn 15095 df-struct 17164 df-slot 17199 df-ndx 17211 df-base 17227 df-plusg 17280 df-0g 17451 df-gsum 17452 df-mgm 18655 df-sgrp 18734 df-mnd 18750 |
| This theorem is referenced by: signstres 34831 signsvtp 34839 signsvtn 34840 |
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