Almost Optimal Exact Distance Oracles for Planar Graphs
Almost Optimal Exact Distance Oracles for Planar Graphs
复制标题
平面图的近乎最优精确距离预言
DOI:
10.1145/3580474
复制
发表时间:
2023
影响因子:
2.5
通讯作者:
Wulff-Nilsen, Christian
中科院分区:
文献类型:
--
作者:
Charalampopoulos, Panagiotis;Gawrychowski, Paweł;Long, Yaowei;Mozes, Shay;Pettie, Seth;Weimann, Oren;Wulff-Nilsen, Christian
We consider the problem of preprocessing a weighted directed planar graph in order to quickly answer exact distance queries. The main tension in this problem is betweenspaceSandquery timeQ, and since the mid-1990s all results had polynomial time-space tradeoffs, e.g.,Q= ~ Θ(n/√ S) orQ= ~Θ(n5/2/S3/2).In this article we show that there is no polynomial tradeoff between time and space and that it is possible tosimultaneouslyachieve almost optimal spacen1+o(1)and almost optimal query timeno(1). More precisely, we achieve the following space-time tradeoffs:n1+o(1)space and log2+o(1)nquery time,nlog2+o(1)nspace andno(1)query time,n4/3+o(1)space and log1+o(1)nquery time.We reduce a distance query to a variety ofpoint locationproblems in additively weightedVoronoi diagramsand develop new algorithms for the point location problem itself using several partially persistent dynamic tree data structures.
登录
查看更多内容
DOI:
10.1007/3-540-48224-5_12
发表时间:
2001
期刊:
The American journal of physiology
影响因子:
--
作者:
G. Brodal;Rolf Fagerberg;Christian N. S. Pedersen;Anna Pagh
通讯作者:
Anna Pagh
DOI:
10.1137/1.9781611975031.32
发表时间:
2015
期刊:
Proceedings of the 50th Annual ACM SIGACT Symposium on Theory of Computing
影响因子:
--
作者:
S. Mozes;Kirill Nikolaev;Yahav Nussbaum;Oren Weimann
通讯作者:
Oren Weimann
DOI:
10.1109/focs52979.2021.00044
发表时间:
2022
期刊:
2021 IEEE 62nd Annual Symposium on Foundations of Computer Science
影响因子:
--
作者:
Le, Hung;Wulff-Nilsen, Christian
通讯作者:
Wulff-Nilsen, Christian
DOI:
10.1007/978-3-030-32686-9_20
发表时间:
2019
期刊:
The American journal of physiology
影响因子:
--
作者:
D. D. Giustina;N. Prezza;Rossano Venturini
通讯作者:
Rossano Venturini
DOI:
--
发表时间:
2015
期刊:
Symposium on the Theory of Computing
影响因子:
--
作者:
S. Chechik
通讯作者:
S. Chechik