Small-Bias Spaces for Group Products
Small-Bias Spaces for Group Products
复制标题
群产品的小偏差空间
DOI:
10.1007/978-3-642-03685-9_49
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发表时间:
2009
期刊:
影响因子:
--
通讯作者:
David Zuckerman
中科院分区:
文献类型:
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作者:
Raghu Meka;David Zuckerman
Small-bias, or *** -biased, spaces have found many applications in complexity theory, coding theory, and derandomization. We generalize the notion of small-bias spaces to the setting of group products. Besides being natural, our extension captures some of the difficulties in constructing pseudorandom generators for constant-width branching programs - a longstanding open problem. We provide an efficient deterministic construction of small-bias spaces for solvable groups. Our construction exploits the fact that solvable groups have nontrivial normal subgroups that are abelian and builds on the construction of Azar et al. [AMN98] for abelian groups. For arbitrary finite groups, we give an efficient deterministic construction achieving constant bias. We also construct pseudorandom generators fooling linear functions mod p for primes p .