Mathematical Programming

, Volume 113, Issue 1, pp 39–59 | Cite as

Traveling salesman path problems

  • Fumei LamEmail author
  • Alantha Newman
Open Access


In the traveling salesman path problem, we are given a set of cities, traveling costs between city pairs and fixed source and destination cities. The objective is to find a minimum cost path from the source to destination visiting all cities exactly once. In this paper, we study polyhedral and combinatorial properties of a variant we call the traveling salesman walk problem, in which the objective is to find a minimum cost walk from the source to destination visiting all cities at least once. We first characterize traveling salesman walk perfect graphs, graphs for which the convex hull of incidence vectors of traveling salesman walks can be described by linear inequalities. We show these graphs have a description by way of forbidden minors and also characterize them constructively. We also address the asymmetric traveling salesman path problem (ATSPP) and give a factor \(O(\sqrt{n})\)-approximation algorithm for this problem.

Mathematics Subject Classification (2000)

68Q25 68R10 90C05 90C27 


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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  1. 1.Department of MathematicsMITCambridgeUSA
  2. 2.Max Planck Institut für InformatikSaarbruckenGermany

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