Nearly Optimal Parallel Algorithms for Longest Increasing Subsequence
Nearly Optimal Parallel Algorithms for Longest Increasing Subsequence
复制标题
最长递增子序列的近最优并行算法
DOI:
10.1145/3558481.3591078
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Su, Hsin-Hao
中科院分区:
文献类型:
--
作者:
Cao, Nairen;Huang, Shang-En;Su, Hsin-Hao
The paper presents parallel algorithms for multiplying implicit simple unit-Monge matrices (Krusche and Tiskin, PPAM 2009) of size n x n in the EREW PRAM model. We show implicit simple unit-Monge matrices multiplication of size n x n can be achieved by a deterministic EREW PRAM algorithm with O(n log n log log n) total work and O(log3 n) span. This implies that there is a deterministic EREW PRAM algorithm solving the longest increasing subsequence (LIS) problem in O(n log2 n log log n) work and O(log 4 n) span. Furthermore, with randomization and bitwise operations, implicitly multiplying two simple unit-Monge matrices can be improved to O(n log n) work and O(log3n) span, which leads to a randomized EREW PRAM algorithm obtaining LIS in O(nlog2n) work and O(log4n) span with high probability. In the regime where the LIS has length k = Ψ(log3n), our results improve the span from Õ(n2/3) (Krusche and Tiskin, SPAA 2010) and O(klog n) (Gu, Men, Shen, Sun, and Wan, SPAA 2023) to O(log4 n) while the total work remains near optimal Õ (n).
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DOI:
10.1137/1.9781611975499.13
发表时间:
2018
期刊:
ACM Transactions on Database Systems (TODS)
影响因子:
--
作者:
Yihan Sun;G. Blelloch
通讯作者:
G. Blelloch
影响因子:
7.2
作者:
Picot, Emma;Krusche, Peter;Ott, Sascha
通讯作者:
Ott, Sascha
影响因子:
0.4
作者:
T. Nakashima;A. Fujiwara
通讯作者:
A. Fujiwara
DOI:
--
发表时间:
2016
期刊:
J. Discrete Algorithms
影响因子:
--
作者:
Yijie Han;T. Takaoka
通讯作者:
T. Takaoka
影响因子:
14.9
作者:
Delcher, AL;Kasif, S;Salzberg, SL
通讯作者:
Salzberg, SL