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when quoting this document, please refer to the following
URN: urn:nbn:de:0030-drops-7984
URL: http://drops.dagstuhl.de/opus/volltexte/2006/798/

Lifshits, Yury

Solving Classical String Problems an Compressed Texts

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Abstract

How to solve string problems, if instead of input string we get only program generating it? Is it possible to solve problems faster than just "generate text + apply classical algorithm"? In this paper we consider strings generated by straight-line programs (SLP). These are programs using only assignment operator. We show new algorithms for equivalence, pattern matching, finding periods and covers, computing fingerprint table on SLP-generated strings. From the other hand, computing the Hamming distance is NP-hard. Main corollary is an $O(n2*m)$ algorithm for pattern matching in LZ-compressed texts.

BibTeX - Entry

@InProceedings{lifshits:DSP:2006:798,
  author =	{Yury Lifshits},
  title =	{Solving Classical String Problems an Compressed Texts},
  booktitle =	{Combinatorial and Algorithmic Foundations of Pattern and Association Discovery},
  year =	{2006},
  editor =	{Rudolf Ahlswede and Alberto Apostolico and Vladimir I. Levenshtein},
  number =	{06201},
  series =	{Dagstuhl Seminar Proceedings},
  ISSN =	{1862-4405},
  publisher =	{Internationales Begegnungs- und Forschungszentrum f{\"u}r Informatik (IBFI), Schloss Dagstuhl, Germany},
  address =	{Dagstuhl, Germany},
  URL =		{http://drops.dagstuhl.de/opus/volltexte/2006/798},
  annote =	{Keywords: Pattern matching, Compressed text}
}

Keywords: Pattern matching, Compressed text
Seminar: 06201 - Combinatorial and Algorithmic Foundations of Pattern and Association Discovery
Issue date: 2006
Date of publication: 10.11.2006


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