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- W1596797682 abstract "A sunflower in a hypergraph is a set of hyperedges pairwise intersecting in exactly the same vertex set. Sunflowers are a useful tool in polynomial-time data reduction for problems formalizable as d-Hitting Set, the problem of covering all hyperedges (of cardinality at most d) of a hypergraph by at most k vertices. Additionally, in fault diagnosis, sunflowers yield concise explanations for “highly defective structures”. We provide a linear-time algorithm that, by finding sunflowers, transforms an instance of d-Hitting Set into an equivalent instance comprising at most O(k d ) hyperedges and vertices. In terms of parameterized complexity, we show a problem kernel with asymptotically optimal size (unless coNP ⊆ NP/poly). We show that the number of vertices can be reduced to O(k d − 1) with additional processing in O(k 1.5d ) time—nontrivially combining the sunflower technique with problem kernels due to Abu-Khzam and Moser." @default.
- W1596797682 created "2016-06-24" @default.
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- W1596797682 date "2012-01-01" @default.
- W1596797682 modified "2023-10-01" @default.
- W1596797682 title "Towards Optimal and Expressive Kernelization for d-Hitting Set" @default.
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- W1596797682 doi "https://doi.org/10.1007/978-3-642-32241-9_11" @default.
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