Succinct Data Structures for Retrieval and Approximate Membership
Succinct Data Structures for Retrieval and Approximate Membership
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用于检索和近似成员资格的简洁数据结构
DOI:
10.1007/978-3-540-70575-8_32
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发表时间:
2008
期刊:
影响因子:
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通讯作者:
Rasmus Pagh
中科院分区:
文献类型:
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作者:
Martin Dietzfelbinger;Rasmus Pagh
Theretrieval problemis the problem of associating data with keys in a set. Formally, the data structure must store a functionthat has specified values on the elements of a given setS⊆U, |S| =n, but may have any value on elements outsideS. All known methods (e. g. those based on perfect hash functions), induce a space overhead ofΘ(n) bits over the optimum, regardless of the evaluation time. We show that for anyk, query timeO(k) can be achieved using space that is within a factor 1 +e−kof optimal, asymptotically for largen. The time to construct the data structure isO(n), expected. If we allow logarithmic evaluation time, the additive overhead can be reduced toO(loglogn) bits whp. A general reduction transfers the results on retrieval into analogous results onapproximate membership, a problem traditionally addressed using Bloom filters. Thus we obtain space bounds arbitrarily close to the lower bound for this problem as well. The evaluation procedures of our data structures are extremely simple. For the results stated above we assume free access to fully random hash functions. This assumption can be justified using spaceo(n) to simulate full randomness on a RAM.
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DOI:
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发表时间:
2004
期刊:
ACM-SIAM Symposium on Discrete Algorithms
影响因子:
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作者:
R. Panigrahy
通讯作者:
R. Panigrahy
DOI:
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发表时间:
1996
期刊:
Random Struct. Algorithms
影响因子:
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作者:
Neil J. Calkin
通讯作者:
Neil J. Calkin
DOI:
10.1145/380752.380842
发表时间:
2001
期刊:
J. ACM
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作者:
Stephen Alstrup;G. Brodal;Theis Rauhe
通讯作者:
Theis Rauhe
DOI:
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发表时间:
1995
期刊:
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作者:
V. F. Kolchin;V. I. Khokhlov
通讯作者:
V. I. Khokhlov
影响因子:
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作者:
Martin Dietzfelbinger
通讯作者:
Martin Dietzfelbinger