Fast Exact Algorithms for Hamiltonicity in Claw-Free Graphs
Fast Exact Algorithms for Hamiltonicity in Claw-Free Graphs
复制标题
无爪图中哈密顿性的快速精确算法
DOI:
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发表时间:
2009
期刊:
影响因子:
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通讯作者:
D. Paulusma
中科院分区:
文献类型:
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作者:
H. Broersma;F. Fomin;P. Hof;D. Paulusma
The Hamiltonian Cycle problem asks if an n-vertex graph G has a cycle passing through all vertices of G. This problem is a classic NP-complete problem. So far, finding an exact algorithm that solves it in O *(? n ) time for some constant ?< 2 is a notorious open problem. For a claw-free graph G, finding a hamiltonian cycle is equivalent to finding a closed trail (eulerian subgraph) that dominates the edges of some associated graph H. Using this translation we obtain two exact algorithms that solve the Hamiltonian Cycle problem for the class of claw-free graphs: one algorithm that uses O *(1.6818 n ) time and exponential space, and one algorithm that uses O *(1.8878 n ) time and polynomial space.