Faster subsequence recognition in compressed strings
Zapiski Nauchnykh Seminarov POMI, Studies in constructive mathematics and mathematical logic. Part XI, Tome 358 (2008), pp. 282-300
A. Tiskin. Faster subsequence recognition in compressed strings. Zapiski Nauchnykh Seminarov POMI, Studies in constructive mathematics and mathematical logic. Part XI, Tome 358 (2008), pp. 282-300. http://geodesic.mathdoc.fr/item/ZNSL_2008_358_a14/
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Voir la notice du chapitre de livre provenant de la source Math-Net.Ru

Computation on compressed strings is one of the key approaches to processing massive data sets. We consider local subsequence recognition problems on strings compressed by straight-line programs (SLP), which is closely related to Lempel–Ziv compression. For an SLP-compressed text of length $\overline m$, and an uncompressed pattern of length $n$, Cégielski et al. gave an algorithm for local subsequence recognition running in time $O(\overline mn^2\log n)$. We improve the running time to $O(\overline mn^{1.5})$. Our algorithm can also be used to compute the longest common subsequence between a compressed text and an uncompressed pattern in time $O(\overline mn^{1.5})$; the same problem with a compressed pattern is known to be NP-hard. Bibl. – 22 titles.

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