Reoptimization of the Shortest Common Superstring Problem

  • Authors:
  • Davide Bilò;Hans-Joachim Böckenhauer;Dennis Komm;Richard Královič;Tobias Mömke;Sebastian Seibert;Anna Zych

  • Affiliations:
  • Department of Computer Science, University of L'Aquila,;Department of Computer Science, ETH Zurich, Switzerland;Department of Computer Science, ETH Zurich, Switzerland;Department of Computer Science, ETH Zurich, Switzerland;Department of Computer Science, ETH Zurich, Switzerland;Department of Computer Science, ETH Zurich, Switzerland;Department of Computer Science, ETH Zurich, Switzerland

  • Venue:
  • CPM '09 Proceedings of the 20th Annual Symposium on Combinatorial Pattern Matching
  • Year:
  • 2009

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Abstract

A reoptimization problem describes the following scenario: Given an instance of an optimization problem together with an optimal solution for it, we want to find a good solution for a locally modified instance. In this paper, we deal with reoptimization variants of the shortest common superstring problem where the local modifications consist of adding or removing a single string. We show NP-hardness of these reoptimization problems and design several approximation algorithms for them.