Multiple-source shortest paths in planar graphs

  • Authors:
  • Philip N. Klein

  • Affiliations:
  • Brown University

  • Venue:
  • SODA '05 Proceedings of the sixteenth annual ACM-SIAM symposium on Discrete algorithms
  • Year:
  • 2005

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Abstract

Given an n-node planar graph with nonnegative edge-lengths, our algorithm takes O(n log n) time to construct a data structure that supports queries of the following form in O(log n) time: given a destination node t on the boundary of the infinite face, and given a start node s anywhere, find the s-to-t distance.