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Mirrors > Home > MPE Home > Th. List > wrdnval | Structured version Visualization version GIF version |
Description: Words of a fixed length are mappings from a fixed half-open integer interval. (Contributed by Alexander van der Vekens, 25-Mar-2018.) (Proof shortened by AV, 13-May-2020.) |
Ref | Expression |
---|---|
wrdnval | ⊢ ((𝑉 ∈ 𝑋 ∧ 𝑁 ∈ ℕ0) → {𝑤 ∈ Word 𝑉 ∣ (♯‘𝑤) = 𝑁} = (𝑉 ↑m (0..^𝑁))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-rab 3074 | . 2 ⊢ {𝑤 ∈ Word 𝑉 ∣ (♯‘𝑤) = 𝑁} = {𝑤 ∣ (𝑤 ∈ Word 𝑉 ∧ (♯‘𝑤) = 𝑁)} | |
2 | ovexd 7303 | . . . . 5 ⊢ ((𝑉 ∈ 𝑋 ∧ 𝑁 ∈ ℕ0) → (0..^𝑁) ∈ V) | |
3 | elmapg 8602 | . . . . 5 ⊢ ((𝑉 ∈ 𝑋 ∧ (0..^𝑁) ∈ V) → (𝑤 ∈ (𝑉 ↑m (0..^𝑁)) ↔ 𝑤:(0..^𝑁)⟶𝑉)) | |
4 | 2, 3 | syldan 590 | . . . 4 ⊢ ((𝑉 ∈ 𝑋 ∧ 𝑁 ∈ ℕ0) → (𝑤 ∈ (𝑉 ↑m (0..^𝑁)) ↔ 𝑤:(0..^𝑁)⟶𝑉)) |
5 | iswrdi 14202 | . . . . . . . 8 ⊢ (𝑤:(0..^𝑁)⟶𝑉 → 𝑤 ∈ Word 𝑉) | |
6 | 5 | adantl 481 | . . . . . . 7 ⊢ (((𝑉 ∈ 𝑋 ∧ 𝑁 ∈ ℕ0) ∧ 𝑤:(0..^𝑁)⟶𝑉) → 𝑤 ∈ Word 𝑉) |
7 | fnfzo0hash 14143 | . . . . . . . 8 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑤:(0..^𝑁)⟶𝑉) → (♯‘𝑤) = 𝑁) | |
8 | 7 | adantll 710 | . . . . . . 7 ⊢ (((𝑉 ∈ 𝑋 ∧ 𝑁 ∈ ℕ0) ∧ 𝑤:(0..^𝑁)⟶𝑉) → (♯‘𝑤) = 𝑁) |
9 | 6, 8 | jca 511 | . . . . . 6 ⊢ (((𝑉 ∈ 𝑋 ∧ 𝑁 ∈ ℕ0) ∧ 𝑤:(0..^𝑁)⟶𝑉) → (𝑤 ∈ Word 𝑉 ∧ (♯‘𝑤) = 𝑁)) |
10 | 9 | ex 412 | . . . . 5 ⊢ ((𝑉 ∈ 𝑋 ∧ 𝑁 ∈ ℕ0) → (𝑤:(0..^𝑁)⟶𝑉 → (𝑤 ∈ Word 𝑉 ∧ (♯‘𝑤) = 𝑁))) |
11 | wrdf 14203 | . . . . . . 7 ⊢ (𝑤 ∈ Word 𝑉 → 𝑤:(0..^(♯‘𝑤))⟶𝑉) | |
12 | oveq2 7276 | . . . . . . . 8 ⊢ ((♯‘𝑤) = 𝑁 → (0..^(♯‘𝑤)) = (0..^𝑁)) | |
13 | 12 | feq2d 6582 | . . . . . . 7 ⊢ ((♯‘𝑤) = 𝑁 → (𝑤:(0..^(♯‘𝑤))⟶𝑉 ↔ 𝑤:(0..^𝑁)⟶𝑉)) |
14 | 11, 13 | syl5ibcom 244 | . . . . . 6 ⊢ (𝑤 ∈ Word 𝑉 → ((♯‘𝑤) = 𝑁 → 𝑤:(0..^𝑁)⟶𝑉)) |
15 | 14 | imp 406 | . . . . 5 ⊢ ((𝑤 ∈ Word 𝑉 ∧ (♯‘𝑤) = 𝑁) → 𝑤:(0..^𝑁)⟶𝑉) |
16 | 10, 15 | impbid1 224 | . . . 4 ⊢ ((𝑉 ∈ 𝑋 ∧ 𝑁 ∈ ℕ0) → (𝑤:(0..^𝑁)⟶𝑉 ↔ (𝑤 ∈ Word 𝑉 ∧ (♯‘𝑤) = 𝑁))) |
17 | 4, 16 | bitrd 278 | . . 3 ⊢ ((𝑉 ∈ 𝑋 ∧ 𝑁 ∈ ℕ0) → (𝑤 ∈ (𝑉 ↑m (0..^𝑁)) ↔ (𝑤 ∈ Word 𝑉 ∧ (♯‘𝑤) = 𝑁))) |
18 | 17 | abbi2dv 2878 | . 2 ⊢ ((𝑉 ∈ 𝑋 ∧ 𝑁 ∈ ℕ0) → (𝑉 ↑m (0..^𝑁)) = {𝑤 ∣ (𝑤 ∈ Word 𝑉 ∧ (♯‘𝑤) = 𝑁)}) |
19 | 1, 18 | eqtr4id 2798 | 1 ⊢ ((𝑉 ∈ 𝑋 ∧ 𝑁 ∈ ℕ0) → {𝑤 ∈ Word 𝑉 ∣ (♯‘𝑤) = 𝑁} = (𝑉 ↑m (0..^𝑁))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 = wceq 1541 ∈ wcel 2109 {cab 2716 {crab 3069 Vcvv 3430 ⟶wf 6426 ‘cfv 6430 (class class class)co 7268 ↑m cmap 8589 0cc0 10855 ℕ0cn0 12216 ..^cfzo 13364 ♯chash 14025 Word cword 14198 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1801 ax-4 1815 ax-5 1916 ax-6 1974 ax-7 2014 ax-8 2111 ax-9 2119 ax-10 2140 ax-11 2157 ax-12 2174 ax-ext 2710 ax-rep 5213 ax-sep 5226 ax-nul 5233 ax-pow 5291 ax-pr 5355 ax-un 7579 ax-cnex 10911 ax-resscn 10912 ax-1cn 10913 ax-icn 10914 ax-addcl 10915 ax-addrcl 10916 ax-mulcl 10917 ax-mulrcl 10918 ax-mulcom 10919 ax-addass 10920 ax-mulass 10921 ax-distr 10922 ax-i2m1 10923 ax-1ne0 10924 ax-1rid 10925 ax-rnegex 10926 ax-rrecex 10927 ax-cnre 10928 ax-pre-lttri 10929 ax-pre-lttrn 10930 ax-pre-ltadd 10931 ax-pre-mulgt0 10932 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1544 df-fal 1554 df-ex 1786 df-nf 1790 df-sb 2071 df-mo 2541 df-eu 2570 df-clab 2717 df-cleq 2731 df-clel 2817 df-nfc 2890 df-ne 2945 df-nel 3051 df-ral 3070 df-rex 3071 df-reu 3072 df-rab 3074 df-v 3432 df-sbc 3720 df-csb 3837 df-dif 3894 df-un 3896 df-in 3898 df-ss 3908 df-pss 3910 df-nul 4262 df-if 4465 df-pw 4540 df-sn 4567 df-pr 4569 df-tp 4571 df-op 4573 df-uni 4845 df-int 4885 df-iun 4931 df-br 5079 df-opab 5141 df-mpt 5162 df-tr 5196 df-id 5488 df-eprel 5494 df-po 5502 df-so 5503 df-fr 5543 df-we 5545 df-xp 5594 df-rel 5595 df-cnv 5596 df-co 5597 df-dm 5598 df-rn 5599 df-res 5600 df-ima 5601 df-pred 6199 df-ord 6266 df-on 6267 df-lim 6268 df-suc 6269 df-iota 6388 df-fun 6432 df-fn 6433 df-f 6434 df-f1 6435 df-fo 6436 df-f1o 6437 df-fv 6438 df-riota 7225 df-ov 7271 df-oprab 7272 df-mpo 7273 df-om 7701 df-1st 7817 df-2nd 7818 df-frecs 8081 df-wrecs 8112 df-recs 8186 df-rdg 8225 df-1o 8281 df-er 8472 df-map 8591 df-en 8708 df-dom 8709 df-sdom 8710 df-fin 8711 df-card 9681 df-pnf 10995 df-mnf 10996 df-xr 10997 df-ltxr 10998 df-le 10999 df-sub 11190 df-neg 11191 df-nn 11957 df-n0 12217 df-z 12303 df-uz 12565 df-fz 13222 df-fzo 13365 df-hash 14026 df-word 14199 |
This theorem is referenced by: wrdmap 14230 hashwrdn 14231 naryfvalelwrdf 45931 |
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