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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通讯作者:
Markus Chimani;Petra Mutzel;Bernd Zey
Markus Chimani;Petra Mutzel;Bernd Zey
中科院分区:
其他
文献类型:
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作者:
Markus Chimani;Petra Mutzel;Bernd Zey

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本文提出了一种新的算法来解决具有最优点集V的图的Steiner树问题,其中图的树宽,Bell数Bk是AK-元素集的划分数。这是一个用于固定树宽图的线性时间算法和一个用于的多项式算法。在比已知的算法更快的同时,我们由此使用的着色方案可以被扩展以给出用于获奖的Steiner树以及Thek-基数树问题的新的改进算法。
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.