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- W1022019 abstract "In Indexing with Gaps one seeks to index a text to allow pattern queries that allow gaps within the pattern query. Formally a gappedpattern over alphabet Σ is a pattern of the form p = p1g1p2g2 ... glpl+1, where ∀i, pi ∈ Σ* and each gi is a gap length ∈ N. Often one considers these patterns with some bound constraints, for example, all gaps are bounded by a gap-bound G.Near-optimal solutions have, lately, been proposed for the case of one gap only with a predetermined size. More specifically, an indexing solution for patterns of the form p1 ċ g ċ p2, where g is known apriori. In this case the solutions mentioned are preprocessed in O(n log∈ n) time and O(n) space, where the pattern queries are answered in O(|p1| + |p2|), for constant sized alphabets. For the more general case when there is a bound G these results can be easily adapted with a multiplicative factor of O(G) for the preprocessing, i.e. O(n log∈ nG) preprocessing time and O(nG) preprocessing space. Alas, these solutions do not lend to more than one gap.In this paper we propose a solution for k gaps one with preprocessing time O(nG2k logk n log log n) and space of O(nG2k logk n) and query time O(m + 2k log log n), where m = Σi=1 |pi|." @default.
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- W1022019 date "2011-01-01" @default.
- W1022019 modified "2023-09-23" @default.
- W1022019 title "Indexing with Gaps" @default.
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- W1022019 doi "https://doi.org/10.1007/978-3-642-24583-1_14" @default.
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