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arXiv · 0804.0735

Generalized Traveling Salesman Problem Reduction Algorithms

Gregory Gutin·Daniel Karapetyan
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Abstract

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 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 10-60% for each of the considered solvers.

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Gregory Gutin, Daniel Karapetyan. 2009-04-14. Generalized Traveling Salesman Problem Reduction Algorithms. https://arxiv.org/abs/0804.0735

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