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Mirrors > Home > MPE Home > Th. List > iswrdi | Structured version Visualization version GIF version |
Description: A zero-based sequence is a word. (Contributed by Stefan O'Rear, 15-Aug-2015.) (Revised by Mario Carneiro, 26-Feb-2016.) |
Ref | Expression |
---|---|
iswrdi | ⊢ (𝑊:(0..^𝐿)⟶𝑆 → 𝑊 ∈ Word 𝑆) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | oveq2 7283 | . . . . 5 ⊢ (𝑙 = 𝐿 → (0..^𝑙) = (0..^𝐿)) | |
2 | 1 | feq2d 6586 | . . . 4 ⊢ (𝑙 = 𝐿 → (𝑊:(0..^𝑙)⟶𝑆 ↔ 𝑊:(0..^𝐿)⟶𝑆)) |
3 | 2 | rspcev 3561 | . . 3 ⊢ ((𝐿 ∈ ℕ0 ∧ 𝑊:(0..^𝐿)⟶𝑆) → ∃𝑙 ∈ ℕ0 𝑊:(0..^𝑙)⟶𝑆) |
4 | 0nn0 12248 | . . . 4 ⊢ 0 ∈ ℕ0 | |
5 | fzo0n0 13439 | . . . . . . . . 9 ⊢ ((0..^𝐿) ≠ ∅ ↔ 𝐿 ∈ ℕ) | |
6 | nnnn0 12240 | . . . . . . . . 9 ⊢ (𝐿 ∈ ℕ → 𝐿 ∈ ℕ0) | |
7 | 5, 6 | sylbi 216 | . . . . . . . 8 ⊢ ((0..^𝐿) ≠ ∅ → 𝐿 ∈ ℕ0) |
8 | 7 | necon1bi 2972 | . . . . . . 7 ⊢ (¬ 𝐿 ∈ ℕ0 → (0..^𝐿) = ∅) |
9 | fzo0 13411 | . . . . . . 7 ⊢ (0..^0) = ∅ | |
10 | 8, 9 | eqtr4di 2796 | . . . . . 6 ⊢ (¬ 𝐿 ∈ ℕ0 → (0..^𝐿) = (0..^0)) |
11 | 10 | feq2d 6586 | . . . . 5 ⊢ (¬ 𝐿 ∈ ℕ0 → (𝑊:(0..^𝐿)⟶𝑆 ↔ 𝑊:(0..^0)⟶𝑆)) |
12 | 11 | biimpa 477 | . . . 4 ⊢ ((¬ 𝐿 ∈ ℕ0 ∧ 𝑊:(0..^𝐿)⟶𝑆) → 𝑊:(0..^0)⟶𝑆) |
13 | oveq2 7283 | . . . . . 6 ⊢ (𝑙 = 0 → (0..^𝑙) = (0..^0)) | |
14 | 13 | feq2d 6586 | . . . . 5 ⊢ (𝑙 = 0 → (𝑊:(0..^𝑙)⟶𝑆 ↔ 𝑊:(0..^0)⟶𝑆)) |
15 | 14 | rspcev 3561 | . . . 4 ⊢ ((0 ∈ ℕ0 ∧ 𝑊:(0..^0)⟶𝑆) → ∃𝑙 ∈ ℕ0 𝑊:(0..^𝑙)⟶𝑆) |
16 | 4, 12, 15 | sylancr 587 | . . 3 ⊢ ((¬ 𝐿 ∈ ℕ0 ∧ 𝑊:(0..^𝐿)⟶𝑆) → ∃𝑙 ∈ ℕ0 𝑊:(0..^𝑙)⟶𝑆) |
17 | 3, 16 | pm2.61ian 809 | . 2 ⊢ (𝑊:(0..^𝐿)⟶𝑆 → ∃𝑙 ∈ ℕ0 𝑊:(0..^𝑙)⟶𝑆) |
18 | iswrd 14219 | . 2 ⊢ (𝑊 ∈ Word 𝑆 ↔ ∃𝑙 ∈ ℕ0 𝑊:(0..^𝑙)⟶𝑆) | |
19 | 17, 18 | sylibr 233 | 1 ⊢ (𝑊:(0..^𝐿)⟶𝑆 → 𝑊 ∈ Word 𝑆) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 396 = wceq 1539 ∈ wcel 2106 ≠ wne 2943 ∃wrex 3065 ∅c0 4256 ⟶wf 6429 (class class class)co 7275 0cc0 10871 ℕcn 11973 ℕ0cn0 12233 ..^cfzo 13382 Word cword 14217 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-1st 7831 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-nn 11974 df-n0 12234 df-z 12320 df-uz 12583 df-fz 13240 df-fzo 13383 df-word 14218 |
This theorem is referenced by: iswrdb 14223 snopiswrd 14226 iswrdsymb 14234 iswrddm0 14241 ffz0iswrd 14244 wrdnval 14248 wrdred1 14263 ccatcl 14277 swrdcl 14358 revcl 14474 repsw 14488 repsdf2 14491 cshf1 14523 wrdco 14544 wrdlen2i 14655 pmtrdifwrdellem1 19089 psgnunilem5 19102 ablfaclem2 19689 ablfac2 19692 wrdupgr 27455 wrdumgr 27467 crctcshtrl 28188 wlkiswwlks2lem5 28238 wlkiswwlksupgr2 28242 clwlkclwwlklem2a 28362 upgriseupth 28571 wrdres 31211 cycpmconjslem1 31421 subiwrd 32352 sseqp1 32362 ofcccat 32522 signstf 32545 signshwrd 32568 lpadlem1 32657 frlmfzowrd 40233 frlmvscadiccat 40237 |
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