On representations by low-degree polynomials

On representations by low-degree polynomials
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关于低次多项式的表示

DOI:
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发表时间:
1993
期刊:
Proceedings of 1993 IEEE 34th Annual Foundations of Computer Science
影响因子:
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通讯作者:
R. Smolensky
R. Smolensky
中科院分区:
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文献类型:
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作者:
R. Smolensky

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在本文的第一部分中,我们表明,布尔立方体b/ sub n/嵌入在投射空间p/ sup n/中的子集s可以通过由低分子定义的b/ sub n/ subs的子集近似 - 仅当S的Hilbert函数的值相对于S的大小而言足够小时,仅数量多项式。该特性的使用提供了一种简单而直接的技术,用于证明在大小的大小上的下限ACC [P/SUP R/]电路。在第二部分中,我们查看通过ACC [p/sup r/]电路计算许多输出函数的问题,并在只有在指数较小的任务中才能正确正确时举一个示例。<< etx >>
In the first part of the paper we show that a subset S of a boolean cube B/sub n/ embedded in the projective space P/sup n/ can be approximated by a subset of B/sub n/ defined by nonzeroes of a low-degree polynomial only if the values of the Hilbert function of S are sufficiently small relative to the size of S. The use of this property provides a simple and direct technique for proving lower bounds on the size of ACC[p/sup r/] circuits. In the second part we look at the problem of computing many-output function by ACC[p/sup r/] circuit and give an example when such a circuit can be correct only at exponentially small fraction of assignments.<<ETX>>