Sensitivity analysis for shortest path problems and maximum capacity path problems in undirected graphs

  • Authors:
  • Ramkumar Ramaswamy;James B. Orlin;Nilopal Chakravarti

  • Affiliations:
  • Infosys Technologies Limited, 3rd Cross, 561 229, Electronics City, Bangalore, India;MIT E40-147, 3rd Cross, 02139, Cambridge, MA, USA;Ortec Asia, 30 Cecil Street, 02139, Cambridge, MA, Singapore

  • Venue:
  • Mathematical Programming: Series A and B
  • Year:
  • 2005

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Abstract

This paper addresses sensitivity analysis questions concerning the shortest path problem and the maximum capacity path problem in an undirected network. For both problems, we determine the maximum and minimum weights that each edge can have so that a given path remains optimal. For both problems, we show how to determine these maximum and minimum values for all edges in O(m + K log K) time, where m is the number of edges in the network, and K is the number of edges on the given optimal path.