, Volume 65, Issue 4, pp 802–816 | Cite as

Parameterized Two-Player Nash Equilibrium

  • Danny Hermelin
  • Chien-Chung Huang
  • Stefan Kratsch
  • Magnus Wahlström


We study the problem of computing Nash equilibria in a two-player normal form (bimatrix) game from the perspective of parameterized complexity. Recent results proved hardness for a number of variants, when parameterized by the support size. We complement those results, by identifying three cases in which the problem becomes fixed-parameter tractable. Our results are based on a graph-theoretic representation of a bimatrix game, and on applying graph-theoretic tools on this representation.


Two-player games Nash equilibrium Parameterized complexity Algorithms 


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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • Danny Hermelin
    • 1
  • Chien-Chung Huang
    • 2
  • Stefan Kratsch
    • 3
  • Magnus Wahlström
    • 1
  1. 1.Max-Planck-Institute for InformaticsSaarbrückenGermany
  2. 2.Humboldt-Universität zu BerlinBerlinGermany
  3. 3.Utrecht UniversityUtrechtThe Netherlands

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