| Mathbox for Thierry Arnoux |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > signsvvf | Structured version Visualization version GIF version | ||
| Description: 𝑉 is a function. (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 |
|---|---|
| signsvvf | ⊢ 𝑉:Word ℝ⟶ℕ0 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | signsv.v | . 2 ⊢ 𝑉 = (𝑓 ∈ Word ℝ ↦ Σ𝑗 ∈ (1..^(♯‘𝑓))if(((𝑇‘𝑓)‘𝑗) ≠ ((𝑇‘𝑓)‘(𝑗 − 1)), 1, 0)) | |
| 2 | fzofi 14001 | . . . 4 ⊢ (1..^(♯‘𝑓)) ∈ Fin | |
| 3 | 2 | a1i 11 | . . 3 ⊢ (𝑓 ∈ Word ℝ → (1..^(♯‘𝑓)) ∈ Fin) |
| 4 | 1nn0 12511 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
| 5 | 4 | a1i 11 | . . . 4 ⊢ (((𝑓 ∈ Word ℝ ∧ 𝑗 ∈ (1..^(♯‘𝑓))) ∧ ((𝑇‘𝑓)‘𝑗) ≠ ((𝑇‘𝑓)‘(𝑗 − 1))) → 1 ∈ ℕ0) |
| 6 | 0nn0 12510 | . . . . 5 ⊢ 0 ∈ ℕ0 | |
| 7 | 6 | a1i 11 | . . . 4 ⊢ (((𝑓 ∈ Word ℝ ∧ 𝑗 ∈ (1..^(♯‘𝑓))) ∧ ¬ ((𝑇‘𝑓)‘𝑗) ≠ ((𝑇‘𝑓)‘(𝑗 − 1))) → 0 ∈ ℕ0) |
| 8 | 5, 7 | ifclda 4519 | . . 3 ⊢ ((𝑓 ∈ Word ℝ ∧ 𝑗 ∈ (1..^(♯‘𝑓))) → if(((𝑇‘𝑓)‘𝑗) ≠ ((𝑇‘𝑓)‘(𝑗 − 1)), 1, 0) ∈ ℕ0) |
| 9 | 3, 8 | fsumnn0cl 15777 | . 2 ⊢ (𝑓 ∈ Word ℝ → Σ𝑗 ∈ (1..^(♯‘𝑓))if(((𝑇‘𝑓)‘𝑗) ≠ ((𝑇‘𝑓)‘(𝑗 − 1)), 1, 0) ∈ ℕ0) |
| 10 | 1, 9 | fmpti 7097 | 1 ⊢ 𝑉:Word ℝ⟶ℕ0 |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ∧ wa 400 = wceq 1563 ∈ wcel 2145 ≠ wne 2960 ifcif 4483 {cpr 4587 {ctp 4589 〈cop 4591 ↦ cmpt 5186 ⟶wf 6521 ‘cfv 6525 (class class class)co 7400 ∈ cmpo 7402 Fincfn 8931 ℝcr 11087 0cc0 11088 1c1 11089 − cmin 11429 -cneg 11430 ℕ0cn0 12495 ...cfz 13526 ..^cfzo 13673 ♯chash 14357 Word cword 14540 sgncsgn 15113 Σcsu 15727 ndxcnx 17243 Basecbs 17259 +gcplusg 17300 Σg cgsu 17483 |
| 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 5232 ax-sep 5251 ax-nul 5261 ax-pow 5327 ax-pr 5395 ax-un 7722 ax-inf2 9598 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 ax-pre-sup 11166 |
| 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-op 4592 df-uni 4869 df-int 4909 df-iun 4954 df-br 5106 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5547 df-eprel 5552 df-po 5560 df-so 5561 df-fr 5605 df-se 5606 df-we 5607 df-xp 5658 df-rel 5659 df-cnv 5660 df-co 5661 df-dm 5662 df-rn 5663 df-res 5664 df-ima 5665 df-pred 6292 df-ord 6353 df-on 6354 df-lim 6355 df-suc 6356 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-isom 6534 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-sup 9390 df-oi 9460 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-div 11860 df-nn 12225 df-2 12294 df-3 12295 df-n0 12496 df-z 12583 df-uz 12854 df-rp 13008 df-fz 13527 df-fzo 13674 df-seq 14029 df-exp 14089 df-hash 14358 df-cj 15140 df-re 15141 df-im 15142 df-sqrt 15276 df-abs 15277 df-clim 15529 df-sum 15728 |
| This theorem is referenced by: signsvtp 34887 signsvtn 34888 signlem0 34891 |
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