Fast, precise and dynamic distance queries

  • Authors:
  • Yair Bartal;Lee-Ad Gottlieb;Tsvi Kopelowitz;Moshe Lewenstein;Liam Roditty

  • Affiliations:
  • Hebrew University;Weizmann Institute of Science;Bar Ilan University;Bar Ilan University;Bar Ilan University

  • Venue:
  • Proceedings of the twenty-second annual ACM-SIAM symposium on Discrete Algorithms
  • Year:
  • 2011

Quantified Score

Hi-index 0.02

Visualization

Abstract

We present an approximate distance oracle for a point set S with n points and doubling dimension λ. For every ε 0, the oracle supports (1 + ε)-approximate distance queries in (universal) constant time, occupies space [ε−O(λ) + 2O(λ log λ)]n, and can be constructed in [2O(λ) log3 n + ε−O(λ) +2O(λ log λ)]n expected time. This improves upon the best previously known constructions, presented by Har-Peled and Mendel [13]. Furthermore, the oracle can be made fully dynamic with expected O(1) query time and only 2O(λ) log n + ε−O(λ) +2O(λ log λ) update time. This is the first fully dynamic (1 + ε)-distance oracle.