Connected Searching of Weighted Trees

  • Dariusz Dereniowski
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6281)


In this paper we consider the problem of connected edge searching of weighted trees. Authors claim in [L. Barrière at al., Capture of an intruder by mobile agents, SPAA’02 (2002) 200-209] that there exists a polynomial-time algorithm for finding an optimal search strategy. However, due to some flaws in their algorithm, the problem turns out to be open. It is proven in this paper that the considered problem is strongly NP-complete even for node-weighted trees (the weight of each edge is 1). It is also shown that there exists a polynomial-time algorithm for finding an optimal connected search strategy for a given bounded degree tree with arbitrary weights on the edges and on the vertices.


connected searching graph searching search strategy 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Dariusz Dereniowski
    • 1
  1. 1.Department of Algorithms and System ModelingGdańsk University of TechnologyPoland

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