Faster maxflow via improved dynamic spectral vertex sparsifiers
Faster maxflow via improved dynamic spectral vertex sparsifiers
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通过改进的动态光谱顶点稀疏器加快最大流速度
DOI:
10.1145/3519935.3520068
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Sidford, Aaron
中科院分区:
文献类型:
--
作者:
van den Brand, Jan;Gao, Yu;Jambulapati, Arun;Lee, Yin Tat;Liu, Yang P.;Peng, Richard;Sidford, Aaron
We make several advances broadly related to the maintenance of electrical flows in weighted graphs undergoing dynamic resistance updates, including:(1) More efficient dynamic spectral vertex sparsification, achieved by faster length estimation of random walks in weighted graphs using Morris counters [Morris 1978, Nelson-Yu 2020].(2) A direct reduction from detecting edges with large energy in dynamic electric flows to dynamic spectral vertex sparsifiers.(3) A procedure for turning algorithms for estimating a sequence of vectors under updates from an oblivious adversary to one that tolerates adaptive adversaries via the Gaussian-mechanism from differential privacy.Combining these pieces with modifications to prior robust interior point frameworks gives an algorithm that on graphs withmedges computes a mincost flow with edge costs and capacities in [1,U] in timeO(m3/2−1/58log2U). In prior and independent work, [Axiotis-Mądry-Vladu FOCS 2021] also obtained an improved algorithm for sparse mincost flows on capacitated graphs. Our algorithm implies aO(m3/2−1/58logU) time maxflow algorithm, improving over theO(m3/2−1/328logU) time maxflow algorithm of [Gao-Liu-Peng FOCS 2021].
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DOI:
10.1137/1.9781611976465.33
发表时间:
2021
期刊:
SODA 2021
影响因子:
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作者:
Jambulapati, Arun;Sidford, Aaron
通讯作者:
Sidford, Aaron
DOI:
10.1109/focs.2017.92
发表时间:
2017
期刊:
2017 IEEE 58th Annual Symposium on Foundations of Computer Science (FOCS)
影响因子:
--
作者:
Danupon Nanongkai;Thatchaphol Saranurak;Christian Wulff
通讯作者:
Christian Wulff
DOI:
10.1137/1.9781611975994.16
发表时间:
2019
期刊:
ArXiv
影响因子:
--
作者:
Jan van den Brand
通讯作者:
Jan van den Brand
DOI:
10.1145/3406325.3451056
发表时间:
2020-11
期刊:
Proceedings of the 53rd Annual ACM SIGACT Symposium on Theory of Computing
影响因子:
--
作者:
Sally Dong;Y. Lee;Guanghao Ye
通讯作者:
Sally Dong;Y. Lee;Guanghao Ye
DOI:
10.1145/3313276.3316320
发表时间:
2019
期刊:
Proceedings of the 51st Annual ACM SIGACT Symposium on Theory of Computing
影响因子:
--
作者:
Julia Chuzhoy;S. Khanna
通讯作者:
S. Khanna