Mixed Hypergraphs for Linear-Time Construction of Denser Hashing-Based Data Structures
Mixed Hypergraphs for Linear-Time Construction of Denser Hashing-Based Data Structures
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用于线性时间构造更密集的基于散列的数据结构的混合超图
DOI:
10.1007/978-3-642-35843-2_31
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发表时间:
2013
期刊:
影响因子:
--
通讯作者:
Michael Rink
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文献类型:
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作者:
Michael Rink
There are several hashing-based data structures whose space utilization (keys per table cells) directly depends on the edge density threshold for the appearance of a 2-core in some underlying randomk-uniform hypergraph. We show that by modifying these data structures such that thek-uniform hypergraphs are replaced by certain non-uniform hypergraphs their space utilization can be improved. These non-uniform hypergraphs are a mixture of uniform hypergraphs each with a linear number of edges but with different edge sizes. In the case of two different edge sizes we give a solution for the optimal (expected) number of edges of each size such that the 2-core threshold for the resulting mixed hypergraph is maximized. For suitable edge sizes we obtain optimal thresholds for mixed hypergraphs up to 0.920, improving the maximum 2-core threshold for any randomk-uniform hypergraph, which is about 0.818.
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DOI:
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发表时间:
1993
期刊:
International Workshop on Graph-Theoretic Concepts in Computer Science
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作者:
G. Havas;B. Majewski;N. Wormald;Z. Czech
通讯作者:
Z. Czech
DOI:
10.1007/978-3-642-04128-0_66
发表时间:
2009
期刊:
影响因子:
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作者:
Martin Aumüller;Martin Dietzfelbinger;Michael Rink
通讯作者:
Michael Rink
DOI:
--
发表时间:
2009
期刊:
Random Struct. Algorithms
影响因子:
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作者:
A. Frieze;Páll Melsted
通讯作者:
Páll Melsted
DOI:
--
发表时间:
2004
期刊:
ACM-SIAM Symposium on Discrete Algorithms
影响因子:
--
作者:
Michael Molloy
通讯作者:
Michael Molloy
DOI:
10.1007/978-3-540-70575-8_32
发表时间:
2008
期刊:
影响因子:
--
作者:
Martin Dietzfelbinger;Rasmus Pagh
通讯作者:
Rasmus Pagh