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arXiv 2007.08811cs.DS
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图燃烧的参数化复杂性

Parameterized Complexity of Graph Burning

Yasuaki Kobayashi, Yota Otachi

摘要:

给定一个图$G = (V,E)$和一个整数$k$,Graph Burning询问是否存在$(b_{0},\dots,b_{k-1}) \in V^{k}$,使得$G$中的每个顶点与某个$b_{i}$的距离至多为$i$。这个问题是NP完全的,即使在最大程度的连接毛虫$3$。我们研究了这个问题的参数化复杂性,并回答了Kare和Reddy [IWOCA 2019]提出的关于这个问题的参数化复杂性的所有问题。证明了该问题是$k$参数化的W[2]-完全问题,且除非$\mathrm{NP} \subseteq \mathrm{coNP/poly}$,否则该问题不允许顶点覆盖数参数化的多项式核.我们还表明,该问题是固定参数易于处理的,通过团宽度加上所有连接分量中的最大直径来参数化。这意味着固定参数的易处理性参数化的模宽度,树深度,并通过距离cographs。虽然参数化的距离分裂图不能处理的candle宽度参数,我们表明,这也是易于处理的减少到一个广义的问题,一个较小的解决方案的大小。

英文摘要:

Graph Burning asks, given a graph $G = (V,E)$ and an integer $k$, whether there exists $(b_{0},\dots,b_{k-1}) \in V^{k}$ such that every vertex in $G$ has distance at most $i$ from some $b_{i}$. This problem is known to be NP-complete even on connected caterpillars of maximum degree $3$. We study the parameterized complexity of this problem and answer all questions arose by Kare and Reddy [IWOCA 2019] about parameterized complexity of the problem. We show that the problem is W[2]-complete parameterized by $k$ and that it does no admit a polynomial kernel parameterized by vertex cover number unless $\mathrm{NP} \subseteq \mathrm{coNP/poly}$. We also show that the problem is fixed-parameter tractable parameterized by clique-width plus the maximum diameter among all connected components. This implies the fixed-parameter tractability parameterized by modular-width, by treedepth, and by distance to cographs. Although the parameterization by distance to split graphs cannot be handled with the clique-width argument, we show that this is also tractable by a reduction to a generalized problem with a smaller solution size.

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