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arXiv 2007.06819cs.CC
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代数分支程序的下界与分层

Lower Bounds of Algebraic Branching Programs and Layerization

Christian Engels

摘要:

本文改进了Chatterjee等人的下界。(ECCC 2019)到用于未分层代数分支程序的$Ω(n^2)$下限。我们还研究了分层对代数分支程序的影响。我们展示了一个多项式,具有大小为$O(n)$的未分层ABP,但任何分层ABP的大小至少为$Ω(n\sqrt{n})$。我们在非交换设置中表现出类似的二分法,其中未分层的ABP具有尺寸$O(n)$,并且任何分层的ABP具有至少$Ω(n\log n -\log^2 n)$的尺寸。

英文摘要:

In this paper we improve the lower bound of Chatterjee et al.\ (ECCC 2019) to an $Ω(n^2)$ lower bound for unlayered Algebraic Branching Programs. We also study the impact layerization has on Algebraic Branching Programs. We exhibit a polynomial that has an unlayered ABP of size $O(n)$ but any layered ABP has size at least $Ω(n\sqrt{n})$. We exhibit a similar dichotomy in the non-commutative setting where the unlayered ABP has size $O(n)$ and any layered ABP has size at least $Ω(n\log n -\log^2 n)$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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