The challenges of unbounded treewidth in parameterised subgraph counting problems

Meeks, K. (2016) The challenges of unbounded treewidth in parameterised subgraph counting problems. Discrete Applied Mathematics, 198, pp. 170-194. (doi: 10.1016/j.dam.2015.06.019)

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Parameterised subgraph counting problems are the most thoroughly studied topic in the theory of parameterised counting, and there has been significant recent progress in this area. Many of the existing tractability results for parameterised problems which involve finding or counting subgraphs with particular properties rely on bounding the treewidth of these subgraphs in some sense; here, we prove a number of hardness results for the situation in which this bounded treewidth condition does not hold, resulting in dichotomies for some special cases of the general subgraph counting problem. The paper also gives a thorough survey of known results on this subject and the methods used, as well as discussing the relationships both between multicolour and uncoloured versions of subgraph counting problems, and between exact counting, approximate counting and the corresponding decision problems.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Meeks, Dr Kitty
Authors: Meeks, K.
College/School:College of Science and Engineering > School of Mathematics and Statistics > Mathematics
Journal Name:Discrete Applied Mathematics
ISSN (Online):1872-6771
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in Discrete Applied Mathematics 2015 198:17-194
Publisher Policy:Reproduced under a Creative Commons License

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