All-pairs shortest paths with real weights in O(n3/ log n) time

  • Authors:
  • Timothy M. Chan

  • Affiliations:
  • School of Computer Science, University of Waterloo, Waterloo, Ontario, Canada

  • Venue:
  • WADS'05 Proceedings of the 9th international conference on Algorithms and Data Structures
  • Year:
  • 2005

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Abstract

We describe an O(n3/log n)-time algorithm for the all-pairs-shortest-paths problem for a real-weighted directed graph with n vertices. This slightly improves a series of previous, slightly subcubic algorithms by Fredman (1976), Takaoka (1992), Dobosiewicz (1990), Han (2004), Takaoka (2004), and Zwick (2004). The new algorithm is surprisingly simple and different from previous ones.