Blar i Bergen Open Research Archive på forfatter "van Leeuwen, Erik Jan"

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    • Algorithms for the Rainbow Vertex Coloring Problem on Graph Classes 

      Lima, Paloma T.; van Leeuwen, Erik Jan; van der Wegen, Marieke (Journal article; Peer reviewed, 2020)
      Given a vertex-colored graph, we say a path is a rainbow vertex path if all its internal vertices have distinct colors. The graph is rainbow vertex-connected if there is a rainbow vertex path between every pair of its ...

    • Parameterized complexity of the spanning tree congestion problem 

      Bodlaender, Hans L.; Fomin, Fedor; Golovach, Petr; Otachi, Yota; van Leeuwen, Erik Jan (Peer reviewed; Journal article, 2012-09)
      We study the problem of determining the spanning tree congestion of a graph. We present some sharp contrasts in the parameterized complexity of this problem. First, we show that on apex-minor-free graphs, a general class ...

    • Subexponential-time parameterized algorithm for Steiner tree on planar graphs 

      Pilipczuk, Marcin; Pilipczuk, Michal Pawel; van Leeuwen, Erik Jan; Sankowski, Piotr (Peer reviewed; Journal article, 2013)
      The well-known bidimensionality theory provides a method for designing fast, subexponential-time parameterized algorithms for a vast number of NP-hard problems on sparse graph classes such as planar graphs, bounded genus ...