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Arboricity: An acyclic hypergraph decomposition problem motivated by database theory

机译:乔木性:数据库理论所激发的非循环超图分解问题

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摘要

The arboricity of a hypergraph H is the minimum number of acyclic hypergraphs that partition H. The determination of the arboricity of hypergraphs is a problem motivated by database theory. The exact arboricity of the complete k-uniform hypergraph of order n is previously known only for k∈1,2,n-2,n-1,n. The arboricity of the complete k-uniform hypergraph of order n is determined asymptotically when k=n-O(log ~(1-δ)n), δ positive, and determined exactly when k=n-3. This proves a conjecture of Wang (2008) [20] in the asymptotic sense.
机译:超图H的树状性是划分H的无环超图的最小数目。超图的树状性的确定是数据库理论所激发的问题。先前仅对于k∈1,2,n-2,n-1,n知道n阶完整k一致超图的精确度。当k = n-O(log〜(1-δ)n),δ为正值时,渐近确定n阶完整k一致超图的树状度,当k = n-3时精确确定树状度。这证明了Wang(2008)[20]在渐近意义上的猜想。

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