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2015 | OriginalPaper | Buchkapitel

Parameterized Algorithms for Parity Games

verfasst von : Jakub Gajarský, Michael Lampis, Kazuhisa Makino, Valia Mitsou, Sebastian Ordyniak

Erschienen in: Mathematical Foundations of Computer Science 2015

Verlag: Springer Berlin Heidelberg

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Abstract

Determining the winner of a Parity Game is a major problem in computational complexity with a number of applications in verification. In a parameterized complexity setting, the problem has often been considered with parameters such as (directed versions of) treewidth or clique-width, by applying dynamic programming techniques.
In this paper we adopt a parameterized approach which is more inspired by well-known (non-parameterized) algorithms for this problem. We consider a number of natural parameterizations, such as by Directed Feedback Vertex Set, Distance to Tournament, and Modular Width. We show that, for these parameters, it is possible to obtain recursive parameterized algorithms which are simpler, faster and only require polynomial space. We complement these results with some algorithmic lower bounds which, among others, rule out a possible avenue for improving the best-known sub-exponential time algorithm for parity games.

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Fußnoten
1
As usual in parameterized complexity the \(O^*\!\!\left( f(k)\right) \)-notation, for some function f of the parameter k, means that there is an algorithm running in time \(O(f(k)n^{O(1)})\), where n is the input size of the problem.
 
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Metadaten
Titel
Parameterized Algorithms for Parity Games
verfasst von
Jakub Gajarský
Michael Lampis
Kazuhisa Makino
Valia Mitsou
Sebastian Ordyniak
Copyright-Jahr
2015
Verlag
Springer Berlin Heidelberg
DOI
https://doi.org/10.1007/978-3-662-48054-0_28