A note on contracting claw-free graphs

Fiala, J.; Kaminski, M.; Paulusma, D.

A note on contracting claw-free graphs

Fiala, J.; Kaminski, M.; Paulusma, D.

Authors

J. Fiala

M. Kaminski

Professor Daniel Paulusma daniel.paulusma@durham.ac.uk
Professor

Abstract

A graph containment problem is to decide whether one graph called the host graph can be modified into some other graph called the target graph by using a number of specified graph operations. We consider edge deletions, edge contractions, vertex deletions and vertex dissolutions as possible graph operations permitted. By allowing any combination of these four operations we capture the following problems: testing on (induced) minors, (induced) topological minors, (induced) subgraphs, (induced) spanning subgraphs, dissolutions and contractions. We show that these problems stay NP-complete even when the host and target belong to the class of line graphs, which form a subclass of the class of claw-free graphs, i.e., graphs with no induced 4-vertex star. A natural question is to study the computational complexity of these problems if the target graph is assumed to be fixed. We show that these problems may become computationally easier when the host graphs are restricted to be claw-free. In particular we consider the problems that are to test whether a given host graph contains a fixed target graph as a contraction.

Citation

Fiala, J., Kaminski, M., & Paulusma, D. (2013). A note on contracting claw-free graphs. Discrete Mathematics & Theoretical Computer Science, 15(2), 223-232

Journal Article Type	Article
Publication Date	Jan 1, 2013
Deposit Date	Dec 20, 2014
Publicly Available Date	Jan 7, 2015
Journal	Discrete mathematics and theoretical computer science
Print ISSN	1462-7264
Publisher	Episciences.org
Peer Reviewed	Peer Reviewed
Volume	15
Issue	2
Pages	223-232
Public URL	https://durham-repository.worktribe.com/output/1439520
Publisher URL	http://www.dmtcs.org/dmtcs-ojs/index.php/dmtcs/article/view/2128/4343