A Faster Algorithm for Finding Tarski Fixed Points
A Faster Algorithm for Finding Tarski Fixed Points
复制标题
一种更快的找到 Tarski 不动点的算法
DOI:
10.1145/3524044
复制
发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Rahul Savani
中科院分区:
文献类型:
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作者:
John Fearnley;Rahul Savani
Dang et al. have given an algorithm that can find a Tarski fixed point in a k-dimensional lattice of width n using O(log k n) queries [2]. Multiple authors have conjectured that this algorithm is optimal [2, 7], and indeed this has been proven for two-dimensional instances [7]. We show that these conjectures are false in dimension three or higher by giving an O(log2 n) query algorithm for the three-dimensional Tarski problem. We also give a new decomposition theorem for k-dimensional Tarski problems which, in combination with our new algorithm for three dimensions, gives an O(log2 ⌈k/3⌉ n) query algorithm for the k-dimensional problem.
DOI:
10.4230/lipics.itcs.2020.18
发表时间:
2020
期刊:
11th Innovations in Theoretical Computer Science Conference
影响因子:
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作者:
Etessami, Kousha;Papadimitriou, Christos H;Rubinstein, Aviad;Yannakakis, Mihalis
通讯作者:
Yannakakis, Mihalis
影响因子:
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作者:
Fearnley, John;Gordon, Spencer;Mehta, Ruta;Savani, Rahul
通讯作者:
Savani, Rahul