INTRACTABILITY OF CLIQUE-WIDTH PARAMETERIZATIONS

INTRACTABILITY OF CLIQUE-WIDTH PARAMETERIZATIONS
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DOI:
10.1137/080742270
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发表时间:
2010-01-01
影响因子:
1.6
通讯作者:
Saurabh, Saket
Saurabh, Saket
中科院分区:
计算机科学2区
文献类型:
--
作者:
Fomin, Fedor V.;Golovach, Petr A.;Saurabh, Saket

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我们表明,边缘主导集,哈密顿循环和图形着色是W [1]通过集团宽度进行参数化的。这是一个开放的问题,在几篇论文中明确提到,当通过集团宽度参数(即在时间g(k))参数化时,这些问题是否可以固定参数。 n(o(1))在n-vertex图上的n(o(1)),其中g仅是k的某个函数。我们的结果表明,许多基于Clique宽度的算法的运行时间O(N(f(k)))本质上是我们所希望的最好的(从参数化的复杂性中最有一个被广泛相信的假设,即fpt不相等的w [ 1])。
We show that Edge Dominating Set, Hamiltonian Cycle, and Graph Coloring are W[1]-hard parameterized by clique-width. It was an open problem, explicitly mentioned in several papers, whether any of these problems is fixed parameter tractable when parameterized by the clique-width, that is, solvable in time g(k) . n(O(1)) on n-vertex graphs of clique-width k, where g is some function of k only. Our results imply that the running time O(n(f(k))) of many clique-width-based algorithms is essentially the best we can hope for (up to a widely believed assumption from parameterized complexity, namely FPT not equal W[1]).