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Book ChapterDOI

The Travelling Salesman Problem

Stefan Näher
- pp 383-391
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TLDR
The author explains how a so-called “approximation algorithm” can find a tour that is maybe not the shortest one but one whose length usually is quite close to the optimum.
Abstract
In this chapter the author considers how to work out the shortest round-trip through a number of cities, a hard problem for which we do not know how to find an optimal solution. The author first demonstrates why a “brute-force” approach is disastrous, and he then shows how dynamic programming offers a significant improvement in running time. Finally he explains how a so-called “approximation algorithm” can find a tour that is maybe not the shortest one but one whose length usually is quite close to the optimum.

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