On ACC

On ACC
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在 ACC 上

DOI:
10.1007/bf01263423
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发表时间:
1994
影响因子:
1.4
通讯作者:
J. Tarui
J. Tarui
中科院分区:
计算机科学3区
文献类型:
--
作者:
R. Beigel;J. Tarui

文献摘要

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本文证明了ACC类中的每一种语言L都能被根上带有一个双函数门的深度为2的确定性电路识别, $$2^{\log ^{O(1)} n} $$ 扇入logO(1)n的与门,或者等价地,存在多项式spn(x1,.,xn)在Z上的次数为logO(1)n且系数为 时间复杂度O(1) 和函数shn:Z→{0,1}使得对于每个n和每个x ∈{0,1}n,XL(x)=hn(pn(x1,.,xn))。这改进了Yao(1985)的一个结果。我们还分析和改进了户田(1991)和姚(1985)构造的模放大多项式。
AbstractWe show that every languageL in the class ACC can be recognized by depth-two deterministic circuits with a symmetric-function gate at the root and $$2^{\log ^{O(1)} n} $$ AND gates of fan-in logO(1)n at the leaves, or equivalently, there exist polynomialspn(x1,..., xn) overZ of degree logO(1)n and with coefficients of magnitude $$2^{\log ^{O(1)} n} $$ and functionshn:Z→{0,1} such that for eachn and eachx∈{0,1}n,XL(x)=hn(pn(x1,...,xn)). This improves an earlier result of Yao (1985). We also analyze and improve modulus-amplifying polynomials constructed by Toda (1991) and Yao (1985).