Parameterised temporal exploration problems
Parameterised temporal exploration problems
复制标题
参数化时间探索问题
DOI:
10.1016/j.jcss.2023.01.003
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发表时间:
2023
影响因子:
1.1
通讯作者:
Erlebach T
中科院分区:
文献类型:
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作者:
Erlebach T
We study the fixed-parameter tractability of the problem of deciding whether a given temporal graph admits a temporal walk that visits all vertices (temporal exploration) or, in some variants, a certain subset of the vertices. In the strict variant, edges must be traversed in strictly increasing timesteps; in the non-strict variant, any number of edges can be traversed in each timestep. For both variants, we give FPT algorithms for finding a temporal walk that visits a given set X of vertices, parameterised by| X|, and for finding a temporal walk that visits at least k distinct vertices, parameterised by k. We also show W [2]-hardness for a set version of temporal exploration. For the non-strict variant, we give an FPT algorithm for temporal exploration parameterised by the lifetime, and show that temporal exploration can be solved in polynomial time if the graph in each timestep has at most two connected components.