A faster approximation algorithm for the Steiner problem in graphs

@article{Wu2004AFA,
  title={A faster approximation algorithm for the Steiner problem in graphs},
  author={Ying-Fung Wu and Peter Widmayer and Chak-Kuen Wong},
  journal={Acta Informatica},
  year={2004},
  volume={23},
  pages={223-229}
}
SummaryWe present an algorithm for finding a Steiner tree for a connected, undirected distance graph with a specified subset S of the set of vertices V. The set V-S is traditionally denoted as Steiner vertices. The total distance on all edges of this Steiner tree is at most 2(1−1/l) times that of a Steiner minimal tree, where l is the minimum number of leaves in any Steiner minimal tree for the given graph. The algorithm runs in O(¦E¦log¦V¦) time in the worst case, where E is the set of all… 

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