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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 3070 | . 2 ⊢ {𝑤 ∈ Word 𝑉 ∣ (♯‘𝑤) = 𝑁} = {𝑤 ∣ (𝑤 ∈ Word 𝑉 ∧ (♯‘𝑤) = 𝑁)} | |
2 | ovexd 7248 | . . . . 5 ⊢ ((𝑉 ∈ 𝑋 ∧ 𝑁 ∈ ℕ0) → (0..^𝑁) ∈ V) | |
3 | elmapg 8521 | . . . . 5 ⊢ ((𝑉 ∈ 𝑋 ∧ (0..^𝑁) ∈ V) → (𝑤 ∈ (𝑉 ↑m (0..^𝑁)) ↔ 𝑤:(0..^𝑁)⟶𝑉)) | |
4 | 2, 3 | syldan 594 | . . . 4 ⊢ ((𝑉 ∈ 𝑋 ∧ 𝑁 ∈ ℕ0) → (𝑤 ∈ (𝑉 ↑m (0..^𝑁)) ↔ 𝑤:(0..^𝑁)⟶𝑉)) |
5 | iswrdi 14073 | . . . . . . . 8 ⊢ (𝑤:(0..^𝑁)⟶𝑉 → 𝑤 ∈ Word 𝑉) | |
6 | 5 | adantl 485 | . . . . . . 7 ⊢ (((𝑉 ∈ 𝑋 ∧ 𝑁 ∈ ℕ0) ∧ 𝑤:(0..^𝑁)⟶𝑉) → 𝑤 ∈ Word 𝑉) |
7 | fnfzo0hash 14014 | . . . . . . . 8 ⊢ ((𝑁 ∈ ℕ0 ∧ 𝑤:(0..^𝑁)⟶𝑉) → (♯‘𝑤) = 𝑁) | |
8 | 7 | adantll 714 | . . . . . . 7 ⊢ (((𝑉 ∈ 𝑋 ∧ 𝑁 ∈ ℕ0) ∧ 𝑤:(0..^𝑁)⟶𝑉) → (♯‘𝑤) = 𝑁) |
9 | 6, 8 | jca 515 | . . . . . 6 ⊢ (((𝑉 ∈ 𝑋 ∧ 𝑁 ∈ ℕ0) ∧ 𝑤:(0..^𝑁)⟶𝑉) → (𝑤 ∈ Word 𝑉 ∧ (♯‘𝑤) = 𝑁)) |
10 | 9 | ex 416 | . . . . 5 ⊢ ((𝑉 ∈ 𝑋 ∧ 𝑁 ∈ ℕ0) → (𝑤:(0..^𝑁)⟶𝑉 → (𝑤 ∈ Word 𝑉 ∧ (♯‘𝑤) = 𝑁))) |
11 | wrdf 14074 | . . . . . . 7 ⊢ (𝑤 ∈ Word 𝑉 → 𝑤:(0..^(♯‘𝑤))⟶𝑉) | |
12 | oveq2 7221 | . . . . . . . 8 ⊢ ((♯‘𝑤) = 𝑁 → (0..^(♯‘𝑤)) = (0..^𝑁)) | |
13 | 12 | feq2d 6531 | . . . . . . 7 ⊢ ((♯‘𝑤) = 𝑁 → (𝑤:(0..^(♯‘𝑤))⟶𝑉 ↔ 𝑤:(0..^𝑁)⟶𝑉)) |
14 | 11, 13 | syl5ibcom 248 | . . . . . 6 ⊢ (𝑤 ∈ Word 𝑉 → ((♯‘𝑤) = 𝑁 → 𝑤:(0..^𝑁)⟶𝑉)) |
15 | 14 | imp 410 | . . . . 5 ⊢ ((𝑤 ∈ Word 𝑉 ∧ (♯‘𝑤) = 𝑁) → 𝑤:(0..^𝑁)⟶𝑉) |
16 | 10, 15 | impbid1 228 | . . . 4 ⊢ ((𝑉 ∈ 𝑋 ∧ 𝑁 ∈ ℕ0) → (𝑤:(0..^𝑁)⟶𝑉 ↔ (𝑤 ∈ Word 𝑉 ∧ (♯‘𝑤) = 𝑁))) |
17 | 4, 16 | bitrd 282 | . . 3 ⊢ ((𝑉 ∈ 𝑋 ∧ 𝑁 ∈ ℕ0) → (𝑤 ∈ (𝑉 ↑m (0..^𝑁)) ↔ (𝑤 ∈ Word 𝑉 ∧ (♯‘𝑤) = 𝑁))) |
18 | 17 | abbi2dv 2874 | . 2 ⊢ ((𝑉 ∈ 𝑋 ∧ 𝑁 ∈ ℕ0) → (𝑉 ↑m (0..^𝑁)) = {𝑤 ∣ (𝑤 ∈ Word 𝑉 ∧ (♯‘𝑤) = 𝑁)}) |
19 | 1, 18 | eqtr4id 2797 | 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 209 ∧ wa 399 = wceq 1543 ∈ wcel 2110 {cab 2714 {crab 3065 Vcvv 3408 ⟶wf 6376 ‘cfv 6380 (class class class)co 7213 ↑m cmap 8508 0cc0 10729 ℕ0cn0 12090 ..^cfzo 13238 ♯chash 13896 Word cword 14069 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2708 ax-rep 5179 ax-sep 5192 ax-nul 5199 ax-pow 5258 ax-pr 5322 ax-un 7523 ax-cnex 10785 ax-resscn 10786 ax-1cn 10787 ax-icn 10788 ax-addcl 10789 ax-addrcl 10790 ax-mulcl 10791 ax-mulrcl 10792 ax-mulcom 10793 ax-addass 10794 ax-mulass 10795 ax-distr 10796 ax-i2m1 10797 ax-1ne0 10798 ax-1rid 10799 ax-rnegex 10800 ax-rrecex 10801 ax-cnre 10802 ax-pre-lttri 10803 ax-pre-lttrn 10804 ax-pre-ltadd 10805 ax-pre-mulgt0 10806 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2071 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2886 df-ne 2941 df-nel 3047 df-ral 3066 df-rex 3067 df-reu 3068 df-rab 3070 df-v 3410 df-sbc 3695 df-csb 3812 df-dif 3869 df-un 3871 df-in 3873 df-ss 3883 df-pss 3885 df-nul 4238 df-if 4440 df-pw 4515 df-sn 4542 df-pr 4544 df-tp 4546 df-op 4548 df-uni 4820 df-int 4860 df-iun 4906 df-br 5054 df-opab 5116 df-mpt 5136 df-tr 5162 df-id 5455 df-eprel 5460 df-po 5468 df-so 5469 df-fr 5509 df-we 5511 df-xp 5557 df-rel 5558 df-cnv 5559 df-co 5560 df-dm 5561 df-rn 5562 df-res 5563 df-ima 5564 df-pred 6160 df-ord 6216 df-on 6217 df-lim 6218 df-suc 6219 df-iota 6338 df-fun 6382 df-fn 6383 df-f 6384 df-f1 6385 df-fo 6386 df-f1o 6387 df-fv 6388 df-riota 7170 df-ov 7216 df-oprab 7217 df-mpo 7218 df-om 7645 df-1st 7761 df-2nd 7762 df-wrecs 8047 df-recs 8108 df-rdg 8146 df-1o 8202 df-er 8391 df-map 8510 df-en 8627 df-dom 8628 df-sdom 8629 df-fin 8630 df-card 9555 df-pnf 10869 df-mnf 10870 df-xr 10871 df-ltxr 10872 df-le 10873 df-sub 11064 df-neg 11065 df-nn 11831 df-n0 12091 df-z 12177 df-uz 12439 df-fz 13096 df-fzo 13239 df-hash 13897 df-word 14070 |
This theorem is referenced by: wrdmap 14101 hashwrdn 14102 naryfvalelwrdf 45652 |
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