The longest cycle problem is polynomial on interval graphs
The longest cycle problem is polynomial on interval graphs
复制标题
最长循环问题是区间图上的多项式
DOI:
10.1016/j.tcs.2021.01.005
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发表时间:
2021
影响因子:
1.1
通讯作者:
石艺
中科院分区:
文献类型:
--
作者:
尚建辉;李鹏;石艺
The longest cycle problem is the problem of finding a cycle with maximal vertices in a graph. Although it is solvable in polynomial time on few trivial graph classes, the longest cycle problem is well known as NP-complete. A lot of efforts have been devoted to the longest cycle problem. To the best of our knowledge however, there are no polynomial algorithms that can solve any of the non-trivial graph classes. Interval graphs, the intersection of chordal graphs and asteroidal triple-free graphs, are known to be the non-trial graph classes that have polynomial algorithm of the longest cycle problem. In 2009, K. Ioannidou, G.B. Mertzios and S.D. Nikolopoulos presented a polynomial algorithm for the longest path problem on interval graphs in Ioannidou et al. (2009) [19]. Inspired by their work, we investigate the longest cycle problem of interval graphs. In this paper, we present the first polynomial algorithm for the longest cycle problem on interval graphs. A dynamic programming approach is proposed in the polynomial algorithm that runs in O(n8) time, where n is the number of vertices of the input graph. Using a similar approach, we design a polynomial algorithm to solve the longest k-thick subgraph problem on interval graphs which will be presented in another separate work. According to the interesting properties of k-thick interval graphs that we discovered (e.g., an interval graph G is traceable if and only if G is 1-thick, G is hamiltonian if and only if G is 2-thick, G is hamiltonian connected if and only if G is 3-thick and so on), the algorithm presented in this paper can be important in studying the spanning connectivity on interval graphs.
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DOI:
10.1137/130910658
发表时间:
2013-02
期刊:
ArXiv
影响因子:
--
作者:
D. Rautenbach;Jean-Sébastien Sereni
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DOI:
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Discussiones Mathematicae - Graph Theory
影响因子:
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期刊:
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影响因子:
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通讯作者:
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DOI:
10.1007/978-3-642-03816-7_35
发表时间:
2009-08
期刊:
--
影响因子:
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作者:
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通讯作者:
Kyriaki Ioannidou;G. B. Mertzios;Stavros D. Nikolopoulos
影响因子:
1.1
作者:
Ioannidou, Kyriaki;Mertzios, George B.;Nikolopoulos, Stavros D.
通讯作者:
Nikolopoulos, Stavros D.