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Assessing the computational complexity of multilayer subgraph detection

Published online by Cambridge University Press:  05 August 2019

Robert Bredereck
Affiliation:
Institut für Softwaretechnik und Theoretische Informatik, TU Berlin, Germany (e-mail: robert.bredereck@tu-berlin.de)
Christian Komusiewicz
Affiliation:
Fachbereich Mathematik und Informatik, Philipps-Universität Marburg, Marburg, Germany (e-mail: komusiewicz@informatik.uni-marburg.de)
Stefan Kratsch
Affiliation:
Humboldt-Universität zu Berlin, Berlin, Germany (e-mail: kratsch@informatik.hu-berlin.de)
Hendrik Molter*
Affiliation:
Institut für Softwaretechnik und Theoretische Informatik, TU Berlin, Germany (e-mails: h.molter@tu-berlin.de, rolf.niedermeier@tu-berlin.de)
Rolf Niedermeier
Affiliation:
Institut für Softwaretechnik und Theoretische Informatik, TU Berlin, Germany (e-mails: h.molter@tu-berlin.de, rolf.niedermeier@tu-berlin.de)
Manuel Sorge
Affiliation:
Faculty of Mathematics, Informatics and Mechanics, University of Warsaw, Poland (e-mail: manuel.sorge@mimuw.edu.pl)
*
*Corresponding author. Email: h.molter@tu-berlin.de
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Abstract

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Multilayer graphs consist of several graphs, called layers, where the vertex set of all layers is the same but each layer has an individual edge set. They are motivated by real-world problems where entities (vertices) are associated via multiple types of relationships (edges in different layers). We chart the border of computational (in)tractability for the class of subgraph detection problems on multilayer graphs, including fundamental problems such as maximum-cardinality matching, finding certain clique relaxations, or path problems. Mostly encountering hardness results, sometimes even for two or three layers, we can also spot some islands of computational tractability.

Information

Type
Original Article
Copyright
© Cambridge University Press 2019