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Mirrors > Home > MPE Home > Th. List > repswlsw | Structured version Visualization version GIF version |
Description: The last symbol of a nonempty "repeated symbol word". (Contributed by AV, 4-Nov-2018.) |
Ref | Expression |
---|---|
repswlsw | ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ) → (lastS‘(𝑆 repeatS 𝑁)) = 𝑆) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nnnn0 11491 | . . . 4 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℕ0) | |
2 | repsw 13722 | . . . 4 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → (𝑆 repeatS 𝑁) ∈ Word 𝑉) | |
3 | 1, 2 | sylan2 492 | . . 3 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ) → (𝑆 repeatS 𝑁) ∈ Word 𝑉) |
4 | lsw 13538 | . . 3 ⊢ ((𝑆 repeatS 𝑁) ∈ Word 𝑉 → (lastS‘(𝑆 repeatS 𝑁)) = ((𝑆 repeatS 𝑁)‘((♯‘(𝑆 repeatS 𝑁)) − 1))) | |
5 | 3, 4 | syl 17 | . 2 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ) → (lastS‘(𝑆 repeatS 𝑁)) = ((𝑆 repeatS 𝑁)‘((♯‘(𝑆 repeatS 𝑁)) − 1))) |
6 | simpl 474 | . . 3 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ) → 𝑆 ∈ 𝑉) | |
7 | 1 | adantl 473 | . . 3 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ) → 𝑁 ∈ ℕ0) |
8 | repswlen 13723 | . . . . . 6 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0) → (♯‘(𝑆 repeatS 𝑁)) = 𝑁) | |
9 | 1, 8 | sylan2 492 | . . . . 5 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ) → (♯‘(𝑆 repeatS 𝑁)) = 𝑁) |
10 | 9 | oveq1d 6828 | . . . 4 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ) → ((♯‘(𝑆 repeatS 𝑁)) − 1) = (𝑁 − 1)) |
11 | fzo0end 12754 | . . . . 5 ⊢ (𝑁 ∈ ℕ → (𝑁 − 1) ∈ (0..^𝑁)) | |
12 | 11 | adantl 473 | . . . 4 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ) → (𝑁 − 1) ∈ (0..^𝑁)) |
13 | 10, 12 | eqeltrd 2839 | . . 3 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ) → ((♯‘(𝑆 repeatS 𝑁)) − 1) ∈ (0..^𝑁)) |
14 | repswsymb 13721 | . . 3 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ0 ∧ ((♯‘(𝑆 repeatS 𝑁)) − 1) ∈ (0..^𝑁)) → ((𝑆 repeatS 𝑁)‘((♯‘(𝑆 repeatS 𝑁)) − 1)) = 𝑆) | |
15 | 6, 7, 13, 14 | syl3anc 1477 | . 2 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ) → ((𝑆 repeatS 𝑁)‘((♯‘(𝑆 repeatS 𝑁)) − 1)) = 𝑆) |
16 | 5, 15 | eqtrd 2794 | 1 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝑁 ∈ ℕ) → (lastS‘(𝑆 repeatS 𝑁)) = 𝑆) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 = wceq 1632 ∈ wcel 2139 ‘cfv 6049 (class class class)co 6813 0cc0 10128 1c1 10129 − cmin 10458 ℕcn 11212 ℕ0cn0 11484 ..^cfzo 12659 ♯chash 13311 Word cword 13477 lastSclsw 13478 repeatS creps 13484 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1871 ax-4 1886 ax-5 1988 ax-6 2054 ax-7 2090 ax-8 2141 ax-9 2148 ax-10 2168 ax-11 2183 ax-12 2196 ax-13 2391 ax-ext 2740 ax-rep 4923 ax-sep 4933 ax-nul 4941 ax-pow 4992 ax-pr 5055 ax-un 7114 ax-cnex 10184 ax-resscn 10185 ax-1cn 10186 ax-icn 10187 ax-addcl 10188 ax-addrcl 10189 ax-mulcl 10190 ax-mulrcl 10191 ax-mulcom 10192 ax-addass 10193 ax-mulass 10194 ax-distr 10195 ax-i2m1 10196 ax-1ne0 10197 ax-1rid 10198 ax-rnegex 10199 ax-rrecex 10200 ax-cnre 10201 ax-pre-lttri 10202 ax-pre-lttrn 10203 ax-pre-ltadd 10204 ax-pre-mulgt0 10205 |
This theorem depends on definitions: df-bi 197 df-or 384 df-an 385 df-3or 1073 df-3an 1074 df-tru 1635 df-ex 1854 df-nf 1859 df-sb 2047 df-eu 2611 df-mo 2612 df-clab 2747 df-cleq 2753 df-clel 2756 df-nfc 2891 df-ne 2933 df-nel 3036 df-ral 3055 df-rex 3056 df-reu 3057 df-rab 3059 df-v 3342 df-sbc 3577 df-csb 3675 df-dif 3718 df-un 3720 df-in 3722 df-ss 3729 df-pss 3731 df-nul 4059 df-if 4231 df-pw 4304 df-sn 4322 df-pr 4324 df-tp 4326 df-op 4328 df-uni 4589 df-int 4628 df-iun 4674 df-br 4805 df-opab 4865 df-mpt 4882 df-tr 4905 df-id 5174 df-eprel 5179 df-po 5187 df-so 5188 df-fr 5225 df-we 5227 df-xp 5272 df-rel 5273 df-cnv 5274 df-co 5275 df-dm 5276 df-rn 5277 df-res 5278 df-ima 5279 df-pred 5841 df-ord 5887 df-on 5888 df-lim 5889 df-suc 5890 df-iota 6012 df-fun 6051 df-fn 6052 df-f 6053 df-f1 6054 df-fo 6055 df-f1o 6056 df-fv 6057 df-riota 6774 df-ov 6816 df-oprab 6817 df-mpt2 6818 df-om 7231 df-1st 7333 df-2nd 7334 df-wrecs 7576 df-recs 7637 df-rdg 7675 df-1o 7729 df-er 7911 df-en 8122 df-dom 8123 df-sdom 8124 df-fin 8125 df-card 8955 df-pnf 10268 df-mnf 10269 df-xr 10270 df-ltxr 10271 df-le 10272 df-sub 10460 df-neg 10461 df-nn 11213 df-n0 11485 df-z 11570 df-uz 11880 df-fz 12520 df-fzo 12660 df-hash 13312 df-word 13485 df-lsw 13486 df-reps 13492 |
This theorem is referenced by: (None) |
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