 ,                
                            
                    Yota Otachi
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                    Yota Otachi                     
                
                    
             Creative Commons Attribution 3.0 Unported license
                
    Creative Commons Attribution 3.0 Unported license
 
    Graph Burning asks, given a graph G = (V,E) and an integer k, whether there exists (b₀,… ,b_{k-1}) ∈ 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 not admit a polynomial kernel parameterized by vertex cover number unless NP ⊆ 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.
        
    @InProceedings{kobayashi_et_al:LIPIcs.IPEC.2020.21,
  author =	{Kobayashi, Yasuaki and Otachi, Yota},
  title =	{{Parameterized Complexity of Graph Burning}},
  booktitle =	{15th International Symposium on Parameterized and Exact Computation (IPEC 2020)},
  pages =	{21:1--21:10},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-172-6},
  ISSN =	{1868-8969},
  year =	{2020},
  volume =	{180},
  editor =	{Cao, Yixin and Pilipczuk, Marcin},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.IPEC.2020.21},
  URN =		{urn:nbn:de:0030-drops-133241},
  doi =		{10.4230/LIPIcs.IPEC.2020.21},
  annote =	{Keywords: Graph burning, parameterized complexity, fixed-parameter tractability}
}
                     
                                                                                                            
                    