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Compressed Orthogonal Search on Suffix Arrays with Applications to Range LCP

Authors Kotaro Matsuda, Kunihiko Sadakane , Tatiana Starikovskaya, Masakazu Tateshita

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Author Details

Kotaro Matsuda
  • Graduate School of Information Science and Technology, The University of Tokyo, Japan
Kunihiko Sadakane
  • Graduate School of Information Science and Technology, The University of Tokyo, Japan
Tatiana Starikovskaya
  • DIENS, École normale supérieure, PSL Research University, Paris, France
Masakazu Tateshita
  • Graduate School of Information Science and Technology, The University of Tokyo, Japan

Funding

  • Sadakane, Kunihiko: Supported by JST CREST Grant Number JPMJCR1402, Japan.

Acknowledgements

The authors would like to thank anonymous referees for helpful comments.

Cite AsGet BibTex

Kotaro Matsuda, Kunihiko Sadakane, Tatiana Starikovskaya, and Masakazu Tateshita. Compressed Orthogonal Search on Suffix Arrays with Applications to Range LCP. In 31st Annual Symposium on Combinatorial Pattern Matching (CPM 2020). Leibniz International Proceedings in Informatics (LIPIcs), Volume 161, pp. 23:1-23:13, Schloss Dagstuhl - Leibniz-Zentrum für Informatik (2020)
https://doi.org/10.4230/LIPIcs.CPM.2020.23

Abstract

We propose a space-efficient data structure for orthogonal range search on suffix arrays. For general two-dimensional orthogonal range search problem on a set of n points, there exists an n log n (1+o(1))-bit data structure supporting O(log n)-time counting queries [Mäkinen, Navarro 2007]. The space matches the information-theoretic lower bound. However, if we focus on a point set representing a suffix array, there is a chance to obtain a space efficient data structure. We answer this question affirmatively. Namely, we propose a data structure for orthogonal range search on suffix arrays which uses O(1/(ε) n (H₀+1)) bits where H₀ is the order-0 entropy of the string and answers a counting query in O(n^ε) time for any constant ε>0. As an application, we give an O(1/(ε) n (H₀+1))-bit data structure for the range LCP problem.

Subject Classification

ACM Subject Classification
  • Theory of computation → Models of computation
Keywords
  • Orthogonal Range Search
  • Succinct Data Structure
  • Suffix Array

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References

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