Linear space streaming lower bounds for approximating CSPs
Linear space streaming lower bounds for approximating CSPs
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用于近似 CSP 的线性空间流下界
DOI:
10.1145/3519935.3519983
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发表时间:
2022
期刊:
影响因子:
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通讯作者:
Velusamy, Santhoshini
中科院分区:
文献类型:
--
作者:
Chou, Chi-Ning;Golovnev, Alexander;Sudan, Madhu;Velingker, Ameya;Velusamy, Santhoshini
We consider the approximability of constraint satisfaction problems in the streaming setting. For every constraint satisfaction problem (CSP) onnvariables taking values in {0,…,q−1}, we prove that improving over the trivial approximability by a factor ofqrequires Ω(n) space even on instances withO(n) constraints. We also identify a broad subclass of problems for which any improvement over the trivial approximability requires Ω(n) space. The key technical core is an optimal,q−(k−1)-inapproximability for the Maxk-LIN-modqproblem, which is the Max CSP problem where every constraint is given by a system ofk−1 linear equations modqoverkvariables.Our work builds on and extends the breakthrough work of Kapralov and Krachun (Proc. STOC 2019) who showed a linear lower bound on any non-trivial approximation of the MaxCut problem in graphs. MaxCut corresponds roughly to the case of Maxk-LIN-modqwithk=q=2. For general CSPs in the streaming setting, prior results only yielded Ω(√n) space bounds. In particular no linear space lower bound was known for an approximation factor less than 1/2 foranyCSP. Extending the work of Kapralov and Krachun to Maxk-LIN-modqtok>2 andq>2 (while getting optimal hardness results) is the main technical contribution of this work. Each one of these extensions provides non-trivial technical challenges that we overcome in this work.
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DOI:
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发表时间:
2016
期刊:
Symposium on the Theory of Computing
影响因子:
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作者:
Sepehr Assadi;S. Khanna;Yang Li
通讯作者:
Yang Li
DOI:
10.4230/lipics.approx/random.2021.17
发表时间:
2021
期刊:
Comput. Complex.
影响因子:
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作者:
Noah G. Singer;M. Sudan;Santhoshini Velusamy
通讯作者:
Santhoshini Velusamy
DOI:
10.4230/lipics.approx-random.2019.5
发表时间:
2018
期刊:
ArXiv
影响因子:
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作者:
V. Guruswami;Runzhou Tao
通讯作者:
Runzhou Tao
DOI:
10.4230/lipics.approx-random.2017.8
发表时间:
2017
期刊:
Proceedings of the forty-eighth annual ACM symposium on Theory of Computing
影响因子:
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作者:
V. Guruswami;A. Velingker;Santhoshini Velusamy
通讯作者:
Santhoshini Velusamy
DOI:
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发表时间:
2020
期刊:
Annual Symposium on Foundations of Computer Science
影响因子:
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作者:
Assadi, Sepehr;Kol, Gillat;Saxena, Raghuvansh;Yu, Huacheng
通讯作者:
Yu, Huacheng