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文章基本信息

  • 标题:Beating the random assignment on constraint satisfaction problems of bounded degree
  • 本地全文:下载
  • 作者:Boaz Barak ; Ankur Moitra ; Ryan O'Donnell
  • 期刊名称:Electronic Colloquium on Computational Complexity
  • 印刷版ISSN:1433-8092
  • 出版年度:2015
  • 卷号:2015
  • 出版社:Universität Trier, Lehrstuhl für Theoretische Computer-Forschung
  • 摘要:

    We show that for any odd k and any instance of the Max-kXOR constraint satisfaction problem, there is an efficient algorithm that finds an assignment satisfying at least a 2 1 + (1 D ) fraction of constraints, where D is a bound on the number of constraints that each variable occurs in. This improves both qualitatively and quantitatively on the recent work of Farhi, Goldstone, and Gutmann (2014), which gave a \emph{quantum} algorithm to find an assignment satisfying a 2 1 + ( D − 3 4 ) fraction of the equations. For arbitrary constraint satisfaction problems, we give a similar result for ``triangle-free'' instances; i.e., an efficient algorithm that finds an assignment satisfying at least a + (1 D ) fraction of constraints, where is the fraction that would be satisfied by a uniformly random assignment.

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