| 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 13984 | . . . 4 ⊢ (1..^(♯‘𝑓)) ∈ Fin | |
| 3 | 2 | a1i 11 | . . 3 ⊢ (𝑓 ∈ Word ℝ → (1..^(♯‘𝑓)) ∈ Fin) |
| 4 | 1nn0 12494 | . . . . 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 12493 | . . . . 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 4515 | . . 3 ⊢ ((𝑓 ∈ Word ℝ ∧ 𝑗 ∈ (1..^(♯‘𝑓))) → if(((𝑇‘𝑓)‘𝑗) ≠ ((𝑇‘𝑓)‘(𝑗 − 1)), 1, 0) ∈ ℕ0) |
| 9 | 3, 8 | fsumnn0cl 15746 | . 2 ⊢ (𝑓 ∈ Word ℝ → Σ𝑗 ∈ (1..^(♯‘𝑓))if(((𝑇‘𝑓)‘𝑗) ≠ ((𝑇‘𝑓)‘(𝑗 − 1)), 1, 0) ∈ ℕ0) |
| 10 | 1, 9 | fmpti 7089 | 1 ⊢ 𝑉:Word ℝ⟶ℕ0 |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ∧ wa 399 = wceq 1559 ∈ wcel 2141 ≠ wne 2956 ifcif 4479 {cpr 4583 {ctp 4585 〈cop 4587 ↦ cmpt 5180 ⟶wf 6513 ‘cfv 6517 (class class class)co 7392 ∈ cmpo 7394 Fincfn 8923 ℝcr 11069 0cc0 11070 1c1 11071 − cmin 11411 -cneg 11412 ℕ0cn0 12478 ...cfz 13509 ..^cfzo 13656 ♯chash 14340 Word cword 14523 sgncsgn 15096 Σcsu 15696 ndxcnx 17212 Basecbs 17228 +gcplusg 17269 Σg cgsu 17452 |
| 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 7714 ax-inf2 9593 ax-cnex 11126 ax-resscn 11127 ax-1cn 11128 ax-icn 11129 ax-addcl 11130 ax-addrcl 11131 ax-mulcl 11132 ax-mulrcl 11133 ax-mulcom 11134 ax-addass 11135 ax-mulass 11136 ax-distr 11137 ax-i2m1 11138 ax-1ne0 11139 ax-1rid 11140 ax-rnegex 11141 ax-rrecex 11142 ax-cnre 11143 ax-pre-lttri 11144 ax-pre-lttrn 11145 ax-pre-ltadd 11146 ax-pre-mulgt0 11147 ax-pre-sup 11148 |
| 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-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-se 5599 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 6284 df-ord 6345 df-on 6346 df-lim 6347 df-suc 6348 df-iota 6473 df-fun 6519 df-fn 6520 df-f 6521 df-f1 6522 df-fo 6523 df-f1o 6524 df-fv 6525 df-isom 6526 df-riota 7349 df-ov 7395 df-oprab 7396 df-mpo 7397 df-om 7843 df-1st 7966 df-2nd 7967 df-frecs 8257 df-wrecs 8288 df-recs 8337 df-rdg 8376 df-1o 8432 df-er 8673 df-en 8924 df-dom 8925 df-sdom 8926 df-fin 8927 df-sup 9385 df-oi 9455 df-card 9894 df-pnf 11215 df-mnf 11216 df-xr 11217 df-ltxr 11218 df-le 11219 df-sub 11413 df-neg 11414 df-div 11842 df-nn 12208 df-2 12277 df-3 12278 df-n0 12479 df-z 12566 df-uz 12837 df-rp 12991 df-fz 13510 df-fzo 13657 df-seq 14012 df-exp 14072 df-hash 14341 df-cj 15109 df-re 15110 df-im 15111 df-sqrt 15245 df-abs 15246 df-clim 15498 df-sum 15697 |
| This theorem is referenced by: signsvtp 34841 signsvtn 34842 signlem0 34845 |
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