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    2007
    ACM
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    Generalized hypertree decompositions: np-hardness and tractable variants
    15 years 17 days ago
    Generalized hypertree decompositions: np-hardness and tractable variants
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    The generalized hypertree width GHW(H) of a hypergraph H is a measure of its cyclicity. Classes of conjunctive queries or constraint satisfaction problems whose associated hypergr...
    Georg Gottlob, Thomas Schwentick, Zoltán Mi...
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