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Primal-Dual 2-Approximation Algorithm for the Monotonic Multiple Depot Heterogeneous Traveling Salesman Problem

Authors S. Rathinam, R. Ravi, J. Bae, K. Sundar

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Subject Classification

ACM Subject Classification
  • Theory of computation → Routing and network design problems
Keywords
  • Approximation Algorithm
  • Heterogeneous Traveling Salesman Problem
  • Primal-dual Method

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Abstract

We study a Multiple Depot Heterogeneous Traveling Salesman Problem (MDHTSP) where the cost of the traveling between any two targets depends on the type of the vehicle. The travel costs are assumed to be symmetric, satisfy the triangle inequality, and are monotonic, i.e., the travel costs between any two targets monotonically increases with the index of the vehicles. Exploiting the monotonic structure of the travel costs, we present a 2-approximation algorithm based on the primal-dual method.

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S. Rathinam, R. Ravi, J. Bae, and K. Sundar. Primal-Dual 2-Approximation Algorithm for the Monotonic Multiple Depot Heterogeneous Traveling Salesman Problem. In 17th Scandinavian Symposium and Workshops on Algorithm Theory (SWAT 2020). Leibniz International Proceedings in Informatics (LIPIcs), Volume 162, pp. 33:1-33:13, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2020) https://doi.org/10.4230/LIPIcs.SWAT.2020.33

Author Details

S. Rathinam
  • Texas A & M University, College Station, TX 77843, USA
R. Ravi
  • Carnegie Mellon University, Pittsburgh, PA 15213, USA
J. Bae
  • Michigan Technological University, Houghton, MI 49931, USA
K. Sundar
  • Los Alamos Laboratory, NM 87545, USA

Funding

  • Ravi, R.: This material is based upon work supported in part by the U. S. Office of Naval Research under award number N00014-18-1-2099.

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