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arXiv 2403.09145cs.CCcs.FLcs.SC
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复值计数无环约束满足问题的复杂度分类

Complexity Classification of Complex-Weighted Counting Acyclic Constraint Satisfaction Problems

Tomoyuki Yamakami

AI总结:

本文针对复值无环计数约束满足问题,依据是否允许自由使用XOR约束,分别给出二分与三分复杂度分类,并引入AT-可构造性工具分析复杂度上界。

摘要:

我们研究了计数约束满足问题(#CSPs)的计算复杂度,其中当相应的约束超图是无环时,约束将复数分配给布尔输入。这些问题被称为无环#CSPs,或简称为#ACSPs。我们希望在任意一元约束可自由使用的情况下,确定所有此类#ACSPs的计算复杂度。根据我们是否进一步允许或禁止自由使用特定约束XOR(二元不等),我们根据问题所使用的约束类型,提出了#ACSPs的两种复杂度分类。当XOR可自由使用时,我们首先获得一个完整的二分分类。相反,当XOR不可自由使用时,我们则获得一个三分分类。为了处理这些分类中约束的无环性质,我们开发了一种新的技术工具,称为无环T-可构造性或AT-可构造性,并利用它来分析每个#ACSPs的复杂度上界。

英文摘要:

We study the computational complexity of counting constraint satisfaction problems (#CSPs) whose constraints assign complex numbers to Boolean inputs when the corresponding constraint hypergraphs are acyclic. These problems are called acyclic #CSPs or succinctly, #ACSPs. We wish to determine the computational complexity of all such #ACSPs when arbitrary unary constraints are freely available. Depending on whether we further allow or disallow the free use of the specific constraint XOR (binary disequality), we present two complexity classifications of the #ACSPs according to the types of constraints used for the problems. When XOR is freely available, we first obtain a complete dichotomy classification. On the contrary, when XOR is not available for free, we then obtain a trichotomy classification. To deal with an acyclic nature of constraints in those classifications, we develop a new technical tool called acyclic-T-constructibility or AT-constructibility, and we exploit it to analyze a complexity upper bound of each #ACSPs.

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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