Approximate Distance Oracles for Planar Graphs with Improved Query Time-Space Tradeoff
Approximate Distance Oracles for Planar Graphs with Improved Query Time-Space Tradeoff
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具有改进的查询时空权衡的平面图的近似距离预言
DOI:
10.1137/1.9781611974331.ch26
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发表时间:
2016
期刊:
影响因子:
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通讯作者:
Christian Wulff
中科院分区:
文献类型:
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作者:
Christian Wulff
We consider approximate distance oracles for edge-weighted n-vertex undirected planar graphs. Given fixed e > 0. we present a (1 + e)-approximate distance oracle with O(n(log log n)2) space and O((log log n)3) query time. This improves the previous best product of query time and space of the oracles of Thorup (FOCS 2001, J. ACM 2004) and Klein (SODA 2002) from O(n log n) to O(n(log log n)5).