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Improved Heuristics for the Minimum Label Spanning Tree Problem

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3 Author(s)
Yupei Xiong ; Goldman, Sachs & Co, New York, NY ; Golden, B. ; Wasil, E.

Given a connected, undirected graph G whose edges are labeled, the minimum label (or labeling) spanning tree (MLST) problem seeks a spanning tree on G with the minimum number of distinct labels. Maximum vertex covering algorithm (MVCA) is a well-known heuristic for the MLST problem. It is very fast and performs reasonably well. Recently, we developed a genetic algorithm (GA) for the MLST problem. The GA and MVCA are similarly fast but the GA outperforms the MVCA. In this paper, we present four modified versions of MVCA, as well as a modified GA. These modified procedures generate better results, but are more expensive computationally. The modified GA is the best performer with respect to both accuracy and running time

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Evolutionary Computation, IEEE Transactions on  (Volume:10 ,  Issue: 6 )