| Mathbox for Thierry Arnoux |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > signstcl | Structured version Visualization version GIF version | ||
| Description: Closure of the zero skipping sign word. (Contributed by Thierry Arnoux, 9-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 |
|---|---|
| signstcl | ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑁 ∈ (0..^(♯‘𝐹))) → ((𝑇‘𝐹)‘𝑁) ∈ {-1, 0, 1}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | signsv.p | . . 3 ⊢ ⨣ = (𝑎 ∈ {-1, 0, 1}, 𝑏 ∈ {-1, 0, 1} ↦ if(𝑏 = 0, 𝑎, 𝑏)) | |
| 2 | signsv.w | . . 3 ⊢ 𝑊 = {〈(Base‘ndx), {-1, 0, 1}〉, 〈(+g‘ndx), ⨣ 〉} | |
| 3 | signsv.t | . . 3 ⊢ 𝑇 = (𝑓 ∈ Word ℝ ↦ (𝑛 ∈ (0..^(♯‘𝑓)) ↦ (𝑊 Σg (𝑖 ∈ (0...𝑛) ↦ (sgn‘(𝑓‘𝑖)))))) | |
| 4 | signsv.v | . . 3 ⊢ 𝑉 = (𝑓 ∈ Word ℝ ↦ Σ𝑗 ∈ (1..^(♯‘𝑓))if(((𝑇‘𝑓)‘𝑗) ≠ ((𝑇‘𝑓)‘(𝑗 − 1)), 1, 0)) | |
| 5 | 1, 2, 3, 4 | signstfval 34579 | . 2 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑁 ∈ (0..^(♯‘𝐹))) → ((𝑇‘𝐹)‘𝑁) = (𝑊 Σg (𝑖 ∈ (0...𝑁) ↦ (sgn‘(𝐹‘𝑖))))) |
| 6 | 1, 2 | signswbase 34569 | . . 3 ⊢ {-1, 0, 1} = (Base‘𝑊) |
| 7 | 1, 2 | signswmnd 34572 | . . . 4 ⊢ 𝑊 ∈ Mnd |
| 8 | 7 | a1i 11 | . . 3 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑁 ∈ (0..^(♯‘𝐹))) → 𝑊 ∈ Mnd) |
| 9 | fzo0ssnn0 13785 | . . . . . 6 ⊢ (0..^(♯‘𝐹)) ⊆ ℕ0 | |
| 10 | nn0uz 12920 | . . . . . 6 ⊢ ℕ0 = (ℤ≥‘0) | |
| 11 | 9, 10 | sseqtri 4032 | . . . . 5 ⊢ (0..^(♯‘𝐹)) ⊆ (ℤ≥‘0) |
| 12 | 11 | a1i 11 | . . . 4 ⊢ (𝐹 ∈ Word ℝ → (0..^(♯‘𝐹)) ⊆ (ℤ≥‘0)) |
| 13 | 12 | sselda 3983 | . . 3 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑁 ∈ (0..^(♯‘𝐹))) → 𝑁 ∈ (ℤ≥‘0)) |
| 14 | wrdf 14557 | . . . . . . 7 ⊢ (𝐹 ∈ Word ℝ → 𝐹:(0..^(♯‘𝐹))⟶ℝ) | |
| 15 | 14 | ad2antrr 726 | . . . . . 6 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝑁 ∈ (0..^(♯‘𝐹))) ∧ 𝑖 ∈ (0...𝑁)) → 𝐹:(0..^(♯‘𝐹))⟶ℝ) |
| 16 | fzssfzo 34554 | . . . . . . . 8 ⊢ (𝑁 ∈ (0..^(♯‘𝐹)) → (0...𝑁) ⊆ (0..^(♯‘𝐹))) | |
| 17 | 16 | adantl 481 | . . . . . . 7 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑁 ∈ (0..^(♯‘𝐹))) → (0...𝑁) ⊆ (0..^(♯‘𝐹))) |
| 18 | 17 | sselda 3983 | . . . . . 6 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝑁 ∈ (0..^(♯‘𝐹))) ∧ 𝑖 ∈ (0...𝑁)) → 𝑖 ∈ (0..^(♯‘𝐹))) |
| 19 | 15, 18 | ffvelcdmd 7105 | . . . . 5 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝑁 ∈ (0..^(♯‘𝐹))) ∧ 𝑖 ∈ (0...𝑁)) → (𝐹‘𝑖) ∈ ℝ) |
| 20 | 19 | rexrd 11311 | . . . 4 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝑁 ∈ (0..^(♯‘𝐹))) ∧ 𝑖 ∈ (0...𝑁)) → (𝐹‘𝑖) ∈ ℝ*) |
| 21 | sgncl 34541 | . . . 4 ⊢ ((𝐹‘𝑖) ∈ ℝ* → (sgn‘(𝐹‘𝑖)) ∈ {-1, 0, 1}) | |
| 22 | 20, 21 | syl 17 | . . 3 ⊢ (((𝐹 ∈ Word ℝ ∧ 𝑁 ∈ (0..^(♯‘𝐹))) ∧ 𝑖 ∈ (0...𝑁)) → (sgn‘(𝐹‘𝑖)) ∈ {-1, 0, 1}) |
| 23 | 6, 8, 13, 22 | gsumncl 34555 | . 2 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑁 ∈ (0..^(♯‘𝐹))) → (𝑊 Σg (𝑖 ∈ (0...𝑁) ↦ (sgn‘(𝐹‘𝑖)))) ∈ {-1, 0, 1}) |
| 24 | 5, 23 | eqeltrd 2841 | 1 ⊢ ((𝐹 ∈ Word ℝ ∧ 𝑁 ∈ (0..^(♯‘𝐹))) → ((𝑇‘𝐹)‘𝑁) ∈ {-1, 0, 1}) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2108 ≠ wne 2940 ⊆ wss 3951 ifcif 4525 {cpr 4628 {ctp 4630 〈cop 4632 ↦ cmpt 5225 ⟶wf 6557 ‘cfv 6561 (class class class)co 7431 ∈ cmpo 7433 ℝcr 11154 0cc0 11155 1c1 11156 ℝ*cxr 11294 − cmin 11492 -cneg 11493 ℕ0cn0 12526 ℤ≥cuz 12878 ...cfz 13547 ..^cfzo 13694 ♯chash 14369 Word cword 14552 sgncsgn 15125 Σcsu 15722 ndxcnx 17230 Basecbs 17247 +gcplusg 17297 Σg cgsu 17485 Mndcmnd 18747 |
| 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 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2708 ax-rep 5279 ax-sep 5296 ax-nul 5306 ax-pow 5365 ax-pr 5432 ax-un 7755 ax-cnex 11211 ax-resscn 11212 ax-1cn 11213 ax-icn 11214 ax-addcl 11215 ax-addrcl 11216 ax-mulcl 11217 ax-mulrcl 11218 ax-mulcom 11219 ax-addass 11220 ax-mulass 11221 ax-distr 11222 ax-i2m1 11223 ax-1ne0 11224 ax-1rid 11225 ax-rnegex 11226 ax-rrecex 11227 ax-cnre 11228 ax-pre-lttri 11229 ax-pre-lttrn 11230 ax-pre-ltadd 11231 ax-pre-mulgt0 11232 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2540 df-eu 2569 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2892 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3380 df-reu 3381 df-rab 3437 df-v 3482 df-sbc 3789 df-csb 3900 df-dif 3954 df-un 3956 df-in 3958 df-ss 3968 df-pss 3971 df-nul 4334 df-if 4526 df-pw 4602 df-sn 4627 df-pr 4629 df-tp 4631 df-op 4633 df-uni 4908 df-int 4947 df-iun 4993 df-br 5144 df-opab 5206 df-mpt 5226 df-tr 5260 df-id 5578 df-eprel 5584 df-po 5592 df-so 5593 df-fr 5637 df-we 5639 df-xp 5691 df-rel 5692 df-cnv 5693 df-co 5694 df-dm 5695 df-rn 5696 df-res 5697 df-ima 5698 df-pred 6321 df-ord 6387 df-on 6388 df-lim 6389 df-suc 6390 df-iota 6514 df-fun 6563 df-fn 6564 df-f 6565 df-f1 6566 df-fo 6567 df-f1o 6568 df-fv 6569 df-riota 7388 df-ov 7434 df-oprab 7435 df-mpo 7436 df-om 7888 df-1st 8014 df-2nd 8015 df-frecs 8306 df-wrecs 8337 df-recs 8411 df-rdg 8450 df-1o 8506 df-er 8745 df-en 8986 df-dom 8987 df-sdom 8988 df-fin 8989 df-card 9979 df-pnf 11297 df-mnf 11298 df-xr 11299 df-ltxr 11300 df-le 11301 df-sub 11494 df-neg 11495 df-nn 12267 df-2 12329 df-n0 12527 df-z 12614 df-uz 12879 df-fz 13548 df-fzo 13695 df-seq 14043 df-hash 14370 df-word 14553 df-sgn 15126 df-struct 17184 df-slot 17219 df-ndx 17231 df-base 17248 df-plusg 17310 df-0g 17486 df-gsum 17487 df-mgm 18653 df-sgrp 18732 df-mnd 18748 |
| This theorem is referenced by: signsvtn0 34585 signstfvneq0 34587 signstfvcl 34588 signstfveq0 34592 |
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