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Mirrors > Home > MPE Home > Th. List > swrdtrcfv | Structured version Visualization version GIF version |
Description: A symbol in a word truncated by one symbol. (Contributed by Alexander van der Vekens, 16-Jun-2018.) |
Ref | Expression |
---|---|
swrdtrcfv | ⊢ ((𝑊 ∈ Word 𝑉 ∧ 𝑊 ≠ ∅ ∧ 𝐼 ∈ (0..^((#‘𝑊) − 1))) → ((𝑊 substr 〈0, ((#‘𝑊) − 1)〉)‘𝐼) = (𝑊‘𝐼)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | lennncl 13357 | . . . . 5 ⊢ ((𝑊 ∈ Word 𝑉 ∧ 𝑊 ≠ ∅) → (#‘𝑊) ∈ ℕ) | |
2 | 1nn0 11346 | . . . . . . . 8 ⊢ 1 ∈ ℕ0 | |
3 | 2 | a1i 11 | . . . . . . 7 ⊢ ((#‘𝑊) ∈ ℕ → 1 ∈ ℕ0) |
4 | nnnn0 11337 | . . . . . . 7 ⊢ ((#‘𝑊) ∈ ℕ → (#‘𝑊) ∈ ℕ0) | |
5 | nnge1 11084 | . . . . . . 7 ⊢ ((#‘𝑊) ∈ ℕ → 1 ≤ (#‘𝑊)) | |
6 | elfz2nn0 12469 | . . . . . . 7 ⊢ (1 ∈ (0...(#‘𝑊)) ↔ (1 ∈ ℕ0 ∧ (#‘𝑊) ∈ ℕ0 ∧ 1 ≤ (#‘𝑊))) | |
7 | 3, 4, 5, 6 | syl3anbrc 1265 | . . . . . 6 ⊢ ((#‘𝑊) ∈ ℕ → 1 ∈ (0...(#‘𝑊))) |
8 | elfz1end 12409 | . . . . . . 7 ⊢ ((#‘𝑊) ∈ ℕ ↔ (#‘𝑊) ∈ (1...(#‘𝑊))) | |
9 | 8 | biimpi 206 | . . . . . 6 ⊢ ((#‘𝑊) ∈ ℕ → (#‘𝑊) ∈ (1...(#‘𝑊))) |
10 | 7, 9 | jca 553 | . . . . 5 ⊢ ((#‘𝑊) ∈ ℕ → (1 ∈ (0...(#‘𝑊)) ∧ (#‘𝑊) ∈ (1...(#‘𝑊)))) |
11 | 1, 10 | syl 17 | . . . 4 ⊢ ((𝑊 ∈ Word 𝑉 ∧ 𝑊 ≠ ∅) → (1 ∈ (0...(#‘𝑊)) ∧ (#‘𝑊) ∈ (1...(#‘𝑊)))) |
12 | 11 | 3adant3 1101 | . . 3 ⊢ ((𝑊 ∈ Word 𝑉 ∧ 𝑊 ≠ ∅ ∧ 𝐼 ∈ (0..^((#‘𝑊) − 1))) → (1 ∈ (0...(#‘𝑊)) ∧ (#‘𝑊) ∈ (1...(#‘𝑊)))) |
13 | fz0fzdiffz0 12487 | . . 3 ⊢ ((1 ∈ (0...(#‘𝑊)) ∧ (#‘𝑊) ∈ (1...(#‘𝑊))) → ((#‘𝑊) − 1) ∈ (0...(#‘𝑊))) | |
14 | 12, 13 | syl 17 | . 2 ⊢ ((𝑊 ∈ Word 𝑉 ∧ 𝑊 ≠ ∅ ∧ 𝐼 ∈ (0..^((#‘𝑊) − 1))) → ((#‘𝑊) − 1) ∈ (0...(#‘𝑊))) |
15 | swrd0fv 13485 | . 2 ⊢ ((𝑊 ∈ Word 𝑉 ∧ ((#‘𝑊) − 1) ∈ (0...(#‘𝑊)) ∧ 𝐼 ∈ (0..^((#‘𝑊) − 1))) → ((𝑊 substr 〈0, ((#‘𝑊) − 1)〉)‘𝐼) = (𝑊‘𝐼)) | |
16 | 14, 15 | syld3an2 1413 | 1 ⊢ ((𝑊 ∈ Word 𝑉 ∧ 𝑊 ≠ ∅ ∧ 𝐼 ∈ (0..^((#‘𝑊) − 1))) → ((𝑊 substr 〈0, ((#‘𝑊) − 1)〉)‘𝐼) = (𝑊‘𝐼)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 ∧ w3a 1054 = wceq 1523 ∈ wcel 2030 ≠ wne 2823 ∅c0 3948 〈cop 4216 class class class wbr 4685 ‘cfv 5926 (class class class)co 6690 0cc0 9974 1c1 9975 ≤ cle 10113 − cmin 10304 ℕcn 11058 ℕ0cn0 11330 ...cfz 12364 ..^cfzo 12504 #chash 13157 Word cword 13323 substr csubstr 13327 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1762 ax-4 1777 ax-5 1879 ax-6 1945 ax-7 1981 ax-8 2032 ax-9 2039 ax-10 2059 ax-11 2074 ax-12 2087 ax-13 2282 ax-ext 2631 ax-rep 4804 ax-sep 4814 ax-nul 4822 ax-pow 4873 ax-pr 4936 ax-un 6991 ax-cnex 10030 ax-resscn 10031 ax-1cn 10032 ax-icn 10033 ax-addcl 10034 ax-addrcl 10035 ax-mulcl 10036 ax-mulrcl 10037 ax-mulcom 10038 ax-addass 10039 ax-mulass 10040 ax-distr 10041 ax-i2m1 10042 ax-1ne0 10043 ax-1rid 10044 ax-rnegex 10045 ax-rrecex 10046 ax-cnre 10047 ax-pre-lttri 10048 ax-pre-lttrn 10049 ax-pre-ltadd 10050 ax-pre-mulgt0 10051 |
This theorem depends on definitions: df-bi 197 df-or 384 df-an 385 df-3or 1055 df-3an 1056 df-tru 1526 df-ex 1745 df-nf 1750 df-sb 1938 df-eu 2502 df-mo 2503 df-clab 2638 df-cleq 2644 df-clel 2647 df-nfc 2782 df-ne 2824 df-nel 2927 df-ral 2946 df-rex 2947 df-reu 2948 df-rab 2950 df-v 3233 df-sbc 3469 df-csb 3567 df-dif 3610 df-un 3612 df-in 3614 df-ss 3621 df-pss 3623 df-nul 3949 df-if 4120 df-pw 4193 df-sn 4211 df-pr 4213 df-tp 4215 df-op 4217 df-uni 4469 df-int 4508 df-iun 4554 df-br 4686 df-opab 4746 df-mpt 4763 df-tr 4786 df-id 5053 df-eprel 5058 df-po 5064 df-so 5065 df-fr 5102 df-we 5104 df-xp 5149 df-rel 5150 df-cnv 5151 df-co 5152 df-dm 5153 df-rn 5154 df-res 5155 df-ima 5156 df-pred 5718 df-ord 5764 df-on 5765 df-lim 5766 df-suc 5767 df-iota 5889 df-fun 5928 df-fn 5929 df-f 5930 df-f1 5931 df-fo 5932 df-f1o 5933 df-fv 5934 df-riota 6651 df-ov 6693 df-oprab 6694 df-mpt2 6695 df-om 7108 df-1st 7210 df-2nd 7211 df-wrecs 7452 df-recs 7513 df-rdg 7551 df-1o 7605 df-oadd 7609 df-er 7787 df-en 7998 df-dom 7999 df-sdom 8000 df-fin 8001 df-card 8803 df-pnf 10114 df-mnf 10115 df-xr 10116 df-ltxr 10117 df-le 10118 df-sub 10306 df-neg 10307 df-nn 11059 df-n0 11331 df-z 11416 df-uz 11726 df-fz 12365 df-fzo 12505 df-hash 13158 df-word 13331 df-substr 13335 |
This theorem is referenced by: swrdtrcfv0 13488 clwlkclwwlk 26968 |
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