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Pairwise Preferences in the Stable Marriage Problem

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Abstract

We study the classical, two-sided stable marriage problem under pairwise preferences. In the most general setting, agents are allowed to express their preferences as comparisons of any two of their edges and they also have the right to declare a draw or even withdraw from such a comparison. This freedom is then gradually restricted as we specify six stages of orderedness in the preferences, ending with the classical case of strictly ordered lists. We study all cases occurring when combining the three known notions of stability - weak, strong and super-stability - under the assumption that each side of the bipartite market obtains one of the six degrees of orderedness. By designing three polynomial algorithms and two NP-completeness proofs we determine the complexity of all cases not yet known, and thus give an exact boundary in terms of preference structure between tractable and intractable cases.

BibTeX - Entry

@InProceedings{cseh_et_al:LIPIcs:2019:10260,
  author =	{Ágnes Cseh and Attila Juhos},
  title =	{{Pairwise Preferences in the Stable Marriage Problem}},
  booktitle =	{36th International Symposium on Theoretical Aspects of Computer Science (STACS 2019)},
  pages =	{21:1--21:16},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-100-9},
  ISSN =	{1868-8969},
  year =	{2019},
  volume =	{126},
  editor =	{Rolf Niedermeier and Christophe Paul},
  publisher =	{Schloss Dagstuhl--Leibniz-Zentrum fuer Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{http://drops.dagstuhl.de/opus/volltexte/2019/10260},
  doi =		{10.4230/LIPIcs.STACS.2019.21},
  annote =	{Keywords: stable marriage, intransitivity, acyclic preferences, poset, weakly stable matching, strongly stable matching, super stable matching}
}

Keywords: stable marriage, intransitivity, acyclic preferences, poset, weakly stable matching, strongly stable matching, super stable matching
Seminar: 36th International Symposium on Theoretical Aspects of Computer Science (STACS 2019)
Issue date: 2019
Date of publication: 12.03.2019


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