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    ICALP
    2009
    Springer
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    Node-Weighted Steiner Tree and Group Steiner Tree in Planar Graphs
    14 years 11 months ago
    Node-Weighted Steiner Tree and Group Steiner Tree in Planar Graphs
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    We improve the approximation ratios for two optimization problems in planar graphs. For node-weighted Steiner tree, a classical network-optimization problem, the best achievable ap...
    Erik D. Demaine, MohammadTaghi Hajiaghayi, Philip ...
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