Optimal Vertex Fault-Tolerant Spanners in Polynomial Time
Optimal Vertex Fault-Tolerant Spanners in Polynomial Time
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多项式时间内最优顶点容错扳手
DOI:
10.1137/1.9781611976465.174
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Robelle, Caleb
中科院分区:
文献类型:
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作者:
Bodwin, Greg;Dinitz, Michael;Robelle, Caleb
Recent work has pinned down the existentially optimal size bounds for vertex fault-tolerant spanners: for any positive integerk, everyn-node graph has a (2k– 1)-spanner onO(f1–1/kn1+1/k) edges resilient tofvertex faults, and there are examples of input graphs on which this bound cannot be improved. However, these proofs work by analyzing the output spanner of a certain exponential-time greedy algorithm. In this work, we give the first algorithm that produces vertex fault tolerant spanners of optimal size and which runs in polynomial time. Specifically, we give a randomized algorithm which takesÕ(f1–1/kn2+1/k+mf2) time. We also derandomize our algorithm to give a deterministic algorithm with similar bounds. This reflects an exponential improvement in runtime over [Bodwin-Patel PODC '19], the only previously known algorithm for constructing optimal vertex fault-tolerant spanners.
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DOI:
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发表时间:
2017
期刊:
ACM-SIAM Symposium on Discrete Algorithms
影响因子:
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作者:
Gregory Bodwin;M. Dinitz;M. Parter;V. V. Williams
通讯作者:
V. V. Williams
DOI:
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发表时间:
1993
期刊:
Annual International Cryptology Conference
影响因子:
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作者:
Richard Taylor
通讯作者:
Richard Taylor
DOI:
--
发表时间:
2019
期刊:
International Symposium on Distributed Computing
影响因子:
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作者:
M. Parter
通讯作者:
M. Parter
DOI:
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发表时间:
1990
期刊:
Proceedings [1990] 31st Annual Symposium on Foundations of Computer Science
影响因子:
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作者:
B. Awerbuch;D. Peleg
通讯作者:
D. Peleg
DOI:
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发表时间:
2018
期刊:
ACM SIGACT-SIGOPS Symposium on Principles of Distributed Computing
影响因子:
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作者:
Gregory Bodwin;Shyamal Patel
通讯作者:
Shyamal Patel