Improved Upper Bounds for Finding Tarski Fixed Points
Improved Upper Bounds for Finding Tarski Fixed Points
复制标题
改进了查找 Tarski 不动点的上限
DOI:
10.1145/3490486.3538297
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Li, Yuhao
中科院分区:
文献类型:
--
作者:
Chen, Xi;Li, Yuhao
We study the query complexity of finding a Tarski fixed point over the k-dimensional grid {1,...,n}k. Improving on the previous best upper bound of O(log⌈2k/3⌉n)[7], we give a new algorithm with query complexity O(log⌈(k+1)/2⌉n). This is based on a novel decomposition theorem about a weaker variant of the Tarski fixed point problem, where the input consists of a monotone function f:[n]k→[n]k and a monotone sign function b:[n]k→ {-1,0,1} and the goal is to find a point x ∈ [n]k that satisfies either f(x) ≼ x and b(x) ≤ 0 or f(x) ≽ x and b(x) ≥ 0.
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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:
--
作者:
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DOI:
10.1145/3406325.3451052
发表时间:
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期刊:
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影响因子:
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作者:
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通讯作者:
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DOI:
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发表时间:
2022
期刊:
Electron. Colloquium Comput. Complex.
影响因子:
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DOI:
10.1145/3524044
发表时间:
2020
期刊:
ACM Transactions on Algorithms (TALG)
影响因子:
--
作者:
John Fearnley;Rahul Savani
通讯作者:
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