The Travelling Salesman Problem in Bounded Degree Graphs

  • Authors:
  • Andreas Björklund;Thore Husfeldt;Petteri Kaski;Mikko Koivisto

  • Affiliations:
  • Department of Computer Science, Lund University, Lund, Sweden SE-22100;Department of Computer Science, Lund University, Lund, Sweden SE-22100;Helsinki Institute for Information Technology HIIT, Department of Computer Science, University of Helsinki, Finland FI-00014;Helsinki Institute for Information Technology HIIT, Department of Computer Science, University of Helsinki, Finland FI-00014

  • Venue:
  • ICALP '08 Proceedings of the 35th international colloquium on Automata, Languages and Programming, Part I
  • Year:
  • 2008

Quantified Score

Hi-index 0.01

Visualization

Abstract

We show that the travelling salesman problem in bounded-degreegraphs can be solved in time $O\bigl((2-\epsilon)^n\bigr)$, whereε 0 depends only on the degree bound but noton the number of cities, n. The algorithm is a variant ofthe classical dynamic programming solution due to Bellman, and,independently, Held and Karp. In the case of bounded integerweights on the edges, we also present a polynomial-space algorithmwith running time $O\bigl((2-\epsilon)^n\bigr)$ on bounded-degreegraphs.