Improved Local Computation Algorithm for Set Cover via Sparsification
Improved Local Computation Algorithm for Set Cover via Sparsification
复制标题
通过稀疏化改进集覆盖的局部计算算法
DOI:
10.1137/1.9781611975994.181
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Vakilian, A.
中科院分区:
文献类型:
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作者:
Grunau, C.;Mitrovic, S.;Rubinfeld, R.;Vakilian, A.
We design a Local Computation Algorithm (LCA) for the set cover problem. Given a set system where each set has size at mostsand each element is contained in at mosttsets, the algorithm reports whether a given set is in some fixed set cover whose expected size isO(logs) times the minimum fractional set cover value. Our algorithm requiressO(logs)tO(logs+log logt))queries. This result improves upon the application of the reduction of [Parnas and Ron, TCS’07] on the result of [Kuhn et al., SODA’06], which leads to a query complexity of (st)O(log s · logt).To obtain this result, we design a parallel set cover algorithm that admits an efficient simulation in the LCA model by using asparsificationtechnique introduced in [Ghaffari and Uitto, SODA’19] for the maximal independent set problem. The parallel algorithm adds a random subset of the sets to the solution in a style similar to the PRAM algorithm of [Berger et al., FOCS’89]. However, our algorithm differs in the way that it neverrevokesits decisions, which results in a fewer number of adaptive rounds. This requires a novel approximation analysis which might be of independent interest.
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DOI:
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发表时间:
2016
期刊:
Symposium on the Theory of Computing
影响因子:
--
作者:
Sepehr Assadi;S. Khanna;Yang Li
通讯作者:
Yang Li
DOI:
10.1145/3087556.3087585
发表时间:
2016
期刊:
Proceedings of the 29th ACM Symposium on Parallelism in Algorithms and Architectures
影响因子:
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作者:
M. Bateni;Hossein Esfandiari;V. Mirrokni
通讯作者:
V. Mirrokni
DOI:
10.1145/2902251.2902287
发表时间:
2015
期刊:
Proceedings of the 35th ACM SIGMOD-SIGACT-SIGAI Symposium on Principles of Database Systems
影响因子:
--
作者:
P. Indyk;S. Mahabadi;A. Vakilian
通讯作者:
A. Vakilian
影响因子:
0.9
作者:
E. Demaine;P. Indyk;S. Mahabadi;A. Vakilian
通讯作者:
A. Vakilian
DOI:
--
发表时间:
2017
期刊:
20th International Workshop on Approximation Algorithms for Combinatorial Optimization Problem (APPROX 2017
影响因子:
--
作者:
Indyk, P.;Mahabadi, S.;Rubinfeld, R.;Ullman, J.;Vakilian, A.;Yodpinyanee, A.
通讯作者:
Yodpinyanee, A.