首页    期刊浏览 2024年07月16日 星期二
登录注册

文章基本信息

  • 标题:(2+)-SAT is NP-hard
  • 本地全文:下载
  • 作者:Per Austrin ; Venkatesan Guruswami ; Johan Håstad
  • 期刊名称:Electronic Colloquium on Computational Complexity
  • 印刷版ISSN:1433-8092
  • 出版年度:2013
  • 卷号:2013
  • 出版社:Universität Trier, Lehrstuhl für Theoretische Computer-Forschung
  • 摘要:

    We prove the following hardness result for a natural promise variant of the classical CNF-satisfiability problem: Given a CNF-formula where each clause has width w and the guarantee that there exists an assignment satisfying at least g=2w−1 literals in each clause, it is NP-hard to find a satisfying assignment to the formula (that sets at least one literal to true in each clause). On the other hand, when g=2w, it is easy to find a satisfying assignment via simple generalizations of the algorithms for 2-SAT.

  • 关键词:complexity dichotomy; constraint satisfaction; Discrepancy; hypergraph coloring; PCP; Polymorphisms
国家哲学社会科学文献中心版权所有