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    SIGAL
    1990
    221views Algorithms» more  SIGAL 1990»
    Complexity Cores and Hard Problem Instances
    14 years 11 months ago
    Complexity Cores and Hard Problem Instances
    Download  www.uni-ulm.de
    Many intractable problems such as NP-complete problems (provided P = NP) have easy subproblems. In contrast, we investigate the existence and the properties of inherently hard sub...
    Uwe Schöning
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    KR
    2010
    Springer
    248views Automated Reasoning» more  KR 2010»
    Tractable Answer-Set Programming with Weight Constraints: Bounded Treewidth Is not Enough
    14 years 11 months ago
    Tractable Answer-Set Programming with Weight Constraints: Bounded Treewidth Is not Enough
    Download  www.dbai.tuwien.ac.at
    Cardinality constraints or, more generally, weight constraints are well recognized as an important extension of answer-set programming. Clearly, all common algorithmic tasks relat...
    Reinhard Pichler, Stefan Rümmele, Stefan Szei...
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