Two short notes on the on-line traveling salesman: handling times and lookahead
Journal article, 2002

We study extensions of the on-line travelling salesman problem. Our results are: The optimal competitive ratio 2 for arbitrary metric spaces also holds in the case of nonzero handling times. The optimal competitive ratio 3/2 on the half-line cannot be improved by randomization, but there is a 4/3-competitive algorithm under the assumption that the server is notified when the last request has been released. This ratio is also optimal.


traveling salesman

on-line algorithms

handling times


Peter Damaschke

Chalmers, Department of Computing Science, Algorithms

Theoretical Computer Science

0304-3975 (ISSN)

Vol. 289 1 845-852

Subject Categories

Computer and Information Science



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