Improved Steiner Tree Algorithms for Bounded Treewidth
Improved Steiner Tree Algorithms for Bounded Treewidth
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DOI:
10.1007/978-3-642-25011-8_30
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发表时间:
2011-07
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影响因子:
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通讯作者:
Markus Chimani;Petra Mutzel;Bernd Zey
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文献类型:
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作者:
Markus Chimani;Petra Mutzel;Bernd Zey
We propose a new algorithm that solves the Steiner tree problem on graphs with vertex setVto optimality intime, whereis the graph’s treewidth and theBell numberBkis the number of partitions of ak-element set. This is a linear time algorithm for graphs with fixed treewidth and a polynomial algorithm for.While being faster than the previously known algorithms, our thereby used coloring scheme can be extended to give new, improved algorithms for the prize-collecting Steiner tree as well as thek-cardinality tree problems.