Finding hidden independent sets in interval graphs

  • Authors:
  • Therese Biedl;Broňa Brejová;Erik D. Demaine;Angèle M. Hamel;Alejandro López-Ortiz;Tomáš Vinař

  • Affiliations:
  • School of Computer Science, University of Waterloo, Waterloo, ON, Canada;MIT Laboratory for Computer Science, Cambridge, MA;Department of Physics and Computing, Wilfrid Laurier University, Waterloo, ON, Canada;Department of Physics and Computing, Wilfrid Laurier University, Waterloo, ON, Canada;School of Computer Science, University of Waterloo, Waterloo, ON, Canada;School of Computer Science, University of Waterloo, Waterloo, ON, Canada

  • Venue:
  • COCOON'03 Proceedings of the 9th annual international conference on Computing and combinatorics
  • Year:
  • 2003

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Abstract

Consider a game in a given set of intervals (and their implied interval graph G) in which the adversary chooses an independent set X in G. The goal is to discover this hidden independent set X by making the fewest queries of the form "Is point p covered by an interval in X?" Our interest in this problem stems from two applications: experimental gene discovery and the game of Battleship (in a 1-dimensional setting). We provide adaptive algorithms for both the verification scenario (given an independent set, is it X?) and the discovery scenario (find X without any information). Under some assumptions, these algorithms use an asymptotically optimal number of queries in every instance.