Tree embeddings for hop-constrained network design
Tree embeddings for hop-constrained network design
复制标题
用于跳数受限网络设计的树嵌入
DOI:
10.1145/3406325.3451053
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Zuzic, Goran
中科院分区:
文献类型:
--
作者:
Haeupler, Bernhard;Hershkowitz, D. Ellis;Zuzic, Goran
Network design problems aim to compute low-cost structures such as routes, trees and subgraphs. Often, it is natural and desirable to require that these structures have small hop length or hop diameter. Unfortunately, optimization problems with hop constraints are much harder and less well understood than their hop-unconstrained counterparts. A significant algorithmic barrier in this setting is the fact that hop-constrained distances in graphs are very far from being a metric.We show that, nonetheless, hop-constrained distances can be approximated by distributions over ``partial tree metrics.'' We build this result into a powerful and versatile algorithmic tool which, similarly to classic probabilistic tree embeddings, reduces hop-constrained problems in general graphs to hop-unconstrained problems on trees. We then use this tool to give the first poly-logarithmic bicriteria approximations for the hop-constrained variants of many classic network design problems. These include Steiner forest, group Steiner tree, group Steiner forest, buy-at-bulk network design as well as online and oblivious versions of many of these problems.
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DOI:
--
发表时间:
2020
期刊:
ACM-SIAM Symposium on Discrete Algorithms
影响因子:
--
作者:
S. Chechik;Tianyi Zhang
通讯作者:
Tianyi Zhang
影响因子:
2.1
作者:
Luís Gouveia;T. Magnanti
通讯作者:
T. Magnanti
DOI:
--
发表时间:
2000
期刊:
International Colloquium on Automata, Languages and Programming
影响因子:
--
作者:
Michael Elkin;D. Peleg
通讯作者:
D. Peleg
影响因子:
6.4
作者:
Jérôme De Boeck;B. Fortz
通讯作者:
B. Fortz
DOI:
--
发表时间:
2013
期刊:
Electron. Notes Discret. Math.
影响因子:
--
作者:
A. Bley;S. M. Hashemi;M. Rezapour
通讯作者:
M. Rezapour