Model-Theoretic Characterization of Boolean and Arithmetic Circuit Classes of Small Depth

Model-Theoretic Characterization of Boolean and Arithmetic Circuit Classes of Small Depth
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小深度布尔和算术电路类的模型理论表征

DOI:
10.1145/3209108.3209179
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发表时间:
2018
期刊:
Proceedings of the 33rd Annual ACM/IEEE Symposium on Logic in Computer Science
影响因子:
--
通讯作者:
H. Vollmer
H. Vollmer
中科院分区:
--
文献类型:
--
作者:
A. Durand;A. Haak;H. Vollmer

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本文用描述复杂性理论刻画了对数深度的布尔类和算术电路类,即布尔类Nc1、SAc1和AC1,以及它们的算术对应类#Nc1、#SAc1和#AC1。我们利用一阶逻辑公式,即AC0=FO,建立了Immerman对等深度多项式电路的刻画,并在逻辑语言中增加了一个算子,用于以归纳的方式定义关系。考虑到新算子的微小变化,我们得到了上述三个布尔类的一致刻画。然后,算术类可以通过计算对应布尔类中表征语言的公式的语义游戏中的获胜策略的函数来表征。
In this paper we give a characterization of both Boolean and arithmetic circuit classes of logarithmic depth in the vein of descriptive complexity theory, i.e., the Boolean classes NC1, SAC1 and AC1 as well as their arithmetic counterparts #NC1, #SAC1 and #AC1. We build on Immerman's characterization of constant-depth polynomial-size circuits by formulae of first-order logic, i.e., AC0 = FO, and augment the logical language with an operator for defining relations in an inductive way. Considering slight variations of the new operator, we obtain uniform characterizations of the three just mentioned Boolean classes. The arithmetic classes can then be characterized by functions counting winning strategies in semantic games for formulae characterizing languages in the corresponding Boolean class.
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