PASCAL - Pattern Analysis, Statistical Modelling and Computational Learning

Generalized Traveling Salesman Problem Reduction Algorithms
Gregory Gutin and D. Karapetyan
Algoithmic Operations Research 2008.


The generalized traveling salesman problem (GTSP) is an extension of the well-known traveling salesman problem. In GTSP, we are given a partition of cities into groups and we are required to find a minimum length tour that includes exactly one city from each group. The aim of this paper is to present a problem reduction algorithm that deletes redundant vertices and edges, preserving the value of the optimal solution. The algorithm's running time is $O(N^3)$ in the worst case, but it is significantly faster in practice. The algorithm has reduced the problem size by 15--20\% on average in our experiments and this has decreased the solution time by approximately 45\% for each of the three solvers considered.

PDF - Requires Adobe Acrobat Reader or other PDF viewer.
EPrint Type:Article
Project Keyword:Project Keyword UNSPECIFIED
Subjects:Theory & Algorithms
ID Code:5206
Deposited By:Gregory Gutin
Deposited On:24 March 2009