Hardness of Approximation for Knapsack Problems

被引:0
|
作者
Harry Buhrman
Bruno Loff
Leen Torenvliet
机构
[1] CWI,ILLC
[2] University of Amsterdam,undefined
来源
关键词
Computational complexity; Knapsack problem; Subset-sum; Exponential-time hypothesis; PRAM without bit operations; Algebraic-circuit lower-bounds; Hardness of approximation;
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摘要
We show various hardness results for knapsack and related problems; in particular we will show that unless the Exponential-Time Hypothesis is false, subset-sum cannot be approximated any better than with an FPTAS. We also provide new unconditional lower bounds for approximating knapsack in Ketan Mulmuley’s parallel PRAM model. Furthermore, we give a simple new algorithm for approximating knapsack and subset-sum, that can be adapted to work for small space, or in small parallel time.
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页码:372 / 393
页数:21
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