Minimum spanning trees in d dimensions

  • Authors:
  • Drago Krznaric;Christos Levcopoulos;Bengt J. Nilsson

  • Affiliations:
  • Department of Computer Science, Lund University, Box 118, S-221 00 Lund, Sweden;Department of Computer Science, Lund University, Box 118, S-221 00 Lund, Sweden;Department of Technology and Society, Malmö University College, S-205 06 Malmö, Sweden

  • Venue:
  • Nordic Journal of Computing
  • Year:
  • 1999

Quantified Score

Hi-index 0.00

Visualization

Abstract

It is shown that a minimum spanning tree of n points in Rd under any fixed Lp-metric, with p = 1, 2,..., ∞, can be computed in optimal O(Td(n, n)) time in the algebraic computational tree model. Td(n, m) denotes the time to find a bichromatic closest pair between n red points and m blue points. The previous bound in the model was O(Td(n, n)log n) and it was proved only for the L2 (Euclidean) metric. Furthermore, for d = 3 it is shown that a minimum spanning tree can be found in O(n log n) time under the L1 and L∞-metrics. This is optimal in the algebraic computation tree model. The previous bound was O(n log n log log n).