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Mirrors > Home > MPE Home > Th. List > splid | Structured version Visualization version GIF version |
Description: Splicing a subword for the same subword makes no difference. (Contributed by Stefan O'Rear, 20-Aug-2015.) (Proof shortened by AV, 14-Oct-2022.) |
Ref | Expression |
---|---|
splid | ⊢ ((𝑆 ∈ Word 𝐴 ∧ (𝑋 ∈ (0...𝑌) ∧ 𝑌 ∈ (0...(♯‘𝑆)))) → (𝑆 splice 〈𝑋, 𝑌, (𝑆 substr 〈𝑋, 𝑌〉)〉) = 𝑆) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ovex 7308 | . . 3 ⊢ (𝑆 substr 〈𝑋, 𝑌〉) ∈ V | |
2 | splval 14464 | . . 3 ⊢ ((𝑆 ∈ Word 𝐴 ∧ (𝑋 ∈ (0...𝑌) ∧ 𝑌 ∈ (0...(♯‘𝑆)) ∧ (𝑆 substr 〈𝑋, 𝑌〉) ∈ V)) → (𝑆 splice 〈𝑋, 𝑌, (𝑆 substr 〈𝑋, 𝑌〉)〉) = (((𝑆 prefix 𝑋) ++ (𝑆 substr 〈𝑋, 𝑌〉)) ++ (𝑆 substr 〈𝑌, (♯‘𝑆)〉))) | |
3 | 1, 2 | mp3anr3 1459 | . 2 ⊢ ((𝑆 ∈ Word 𝐴 ∧ (𝑋 ∈ (0...𝑌) ∧ 𝑌 ∈ (0...(♯‘𝑆)))) → (𝑆 splice 〈𝑋, 𝑌, (𝑆 substr 〈𝑋, 𝑌〉)〉) = (((𝑆 prefix 𝑋) ++ (𝑆 substr 〈𝑋, 𝑌〉)) ++ (𝑆 substr 〈𝑌, (♯‘𝑆)〉))) |
4 | ccatpfx 14414 | . . . . 5 ⊢ ((𝑆 ∈ Word 𝐴 ∧ 𝑋 ∈ (0...𝑌) ∧ 𝑌 ∈ (0...(♯‘𝑆))) → ((𝑆 prefix 𝑋) ++ (𝑆 substr 〈𝑋, 𝑌〉)) = (𝑆 prefix 𝑌)) | |
5 | 4 | 3expb 1119 | . . . 4 ⊢ ((𝑆 ∈ Word 𝐴 ∧ (𝑋 ∈ (0...𝑌) ∧ 𝑌 ∈ (0...(♯‘𝑆)))) → ((𝑆 prefix 𝑋) ++ (𝑆 substr 〈𝑋, 𝑌〉)) = (𝑆 prefix 𝑌)) |
6 | 5 | oveq1d 7290 | . . 3 ⊢ ((𝑆 ∈ Word 𝐴 ∧ (𝑋 ∈ (0...𝑌) ∧ 𝑌 ∈ (0...(♯‘𝑆)))) → (((𝑆 prefix 𝑋) ++ (𝑆 substr 〈𝑋, 𝑌〉)) ++ (𝑆 substr 〈𝑌, (♯‘𝑆)〉)) = ((𝑆 prefix 𝑌) ++ (𝑆 substr 〈𝑌, (♯‘𝑆)〉))) |
7 | simpl 483 | . . . . 5 ⊢ ((𝑆 ∈ Word 𝐴 ∧ (𝑋 ∈ (0...𝑌) ∧ 𝑌 ∈ (0...(♯‘𝑆)))) → 𝑆 ∈ Word 𝐴) | |
8 | simprr 770 | . . . . 5 ⊢ ((𝑆 ∈ Word 𝐴 ∧ (𝑋 ∈ (0...𝑌) ∧ 𝑌 ∈ (0...(♯‘𝑆)))) → 𝑌 ∈ (0...(♯‘𝑆))) | |
9 | elfzuz2 13261 | . . . . . . 7 ⊢ (𝑌 ∈ (0...(♯‘𝑆)) → (♯‘𝑆) ∈ (ℤ≥‘0)) | |
10 | 9 | ad2antll 726 | . . . . . 6 ⊢ ((𝑆 ∈ Word 𝐴 ∧ (𝑋 ∈ (0...𝑌) ∧ 𝑌 ∈ (0...(♯‘𝑆)))) → (♯‘𝑆) ∈ (ℤ≥‘0)) |
11 | eluzfz2 13264 | . . . . . 6 ⊢ ((♯‘𝑆) ∈ (ℤ≥‘0) → (♯‘𝑆) ∈ (0...(♯‘𝑆))) | |
12 | 10, 11 | syl 17 | . . . . 5 ⊢ ((𝑆 ∈ Word 𝐴 ∧ (𝑋 ∈ (0...𝑌) ∧ 𝑌 ∈ (0...(♯‘𝑆)))) → (♯‘𝑆) ∈ (0...(♯‘𝑆))) |
13 | ccatpfx 14414 | . . . . 5 ⊢ ((𝑆 ∈ Word 𝐴 ∧ 𝑌 ∈ (0...(♯‘𝑆)) ∧ (♯‘𝑆) ∈ (0...(♯‘𝑆))) → ((𝑆 prefix 𝑌) ++ (𝑆 substr 〈𝑌, (♯‘𝑆)〉)) = (𝑆 prefix (♯‘𝑆))) | |
14 | 7, 8, 12, 13 | syl3anc 1370 | . . . 4 ⊢ ((𝑆 ∈ Word 𝐴 ∧ (𝑋 ∈ (0...𝑌) ∧ 𝑌 ∈ (0...(♯‘𝑆)))) → ((𝑆 prefix 𝑌) ++ (𝑆 substr 〈𝑌, (♯‘𝑆)〉)) = (𝑆 prefix (♯‘𝑆))) |
15 | pfxid 14397 | . . . . 5 ⊢ (𝑆 ∈ Word 𝐴 → (𝑆 prefix (♯‘𝑆)) = 𝑆) | |
16 | 15 | adantr 481 | . . . 4 ⊢ ((𝑆 ∈ Word 𝐴 ∧ (𝑋 ∈ (0...𝑌) ∧ 𝑌 ∈ (0...(♯‘𝑆)))) → (𝑆 prefix (♯‘𝑆)) = 𝑆) |
17 | 14, 16 | eqtrd 2778 | . . 3 ⊢ ((𝑆 ∈ Word 𝐴 ∧ (𝑋 ∈ (0...𝑌) ∧ 𝑌 ∈ (0...(♯‘𝑆)))) → ((𝑆 prefix 𝑌) ++ (𝑆 substr 〈𝑌, (♯‘𝑆)〉)) = 𝑆) |
18 | 6, 17 | eqtrd 2778 | . 2 ⊢ ((𝑆 ∈ Word 𝐴 ∧ (𝑋 ∈ (0...𝑌) ∧ 𝑌 ∈ (0...(♯‘𝑆)))) → (((𝑆 prefix 𝑋) ++ (𝑆 substr 〈𝑋, 𝑌〉)) ++ (𝑆 substr 〈𝑌, (♯‘𝑆)〉)) = 𝑆) |
19 | 3, 18 | eqtrd 2778 | 1 ⊢ ((𝑆 ∈ Word 𝐴 ∧ (𝑋 ∈ (0...𝑌) ∧ 𝑌 ∈ (0...(♯‘𝑆)))) → (𝑆 splice 〈𝑋, 𝑌, (𝑆 substr 〈𝑋, 𝑌〉)〉) = 𝑆) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 = wceq 1539 ∈ wcel 2106 Vcvv 3432 〈cop 4567 〈cotp 4569 ‘cfv 6433 (class class class)co 7275 0cc0 10871 ℤ≥cuz 12582 ...cfz 13239 ♯chash 14044 Word cword 14217 ++ cconcat 14273 substr csubstr 14353 prefix cpfx 14383 splice csplice 14462 |
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-ot 4570 df-uni 4840 df-int 4880 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-1o 8297 df-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-fin 8737 df-card 9697 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-hash 14045 df-word 14218 df-concat 14274 df-substr 14354 df-pfx 14384 df-splice 14463 |
This theorem is referenced by: psgnunilem2 19103 |
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