Abstract
This paper describes the traveling tournament problem, a well-known benchmark problem in the field of tournament timetabling. We propose a new lower bound for the traveling tournament problem, and construct a randomized approximation algorithm yielding a feasible solution whose approximation ratio is less than 2+(9/4)/(n−1), where n is the number of teams. Additionally, we propose a deterministic approximation algorithm with the same approximation ratio using a derandomization technique. For the traveling tournament problem, the proposed algorithms are the first approximation algorithms with a constant approximation ratio, which is less than 2+3/4.
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Miyashiro, R., Matsui, T. & Imahori, S. An approximation algorithm for the traveling tournament problem. Ann Oper Res 194, 317–324 (2012). https://doi.org/10.1007/s10479-010-0742-x
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DOI: https://doi.org/10.1007/s10479-010-0742-x