,
Yota Otachi
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}
}