Fast Greedy Algorithms for Constructing Sparse Geometric Spanners

  • Authors:
  • Joachim Gudmundsson;Christos Levcopoulos;Giri Narasimhan

  • Affiliations:
  • -;-;-

  • Venue:
  • SIAM Journal on Computing
  • Year:
  • 2002

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Abstract

Given a set V of n points in $\IR^d$ and a real constant t1, we present the first O(nlog n)-time algorithm to compute a geometric t-spanner on V. A geometric t-spanner on V is a connected graph G = (V,E) with edge weights equal to the Euclidean distances between the endpoints, and with the property that, for all $u,v\in V$, the distance between u and v in G is at most t times the Euclidean distance between u and v. The spanner output by the algorithm has O(n) edges and weight $O(1)\cdot wt(MST)$, and its degree is bounded by a constant.