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arXiv · 1908.09648

Planar p-center problems are solvable in polynomial time when clustering a Pareto Front

Nicolas Dupin·Frank Nielsen·El-Ghazali Talbi
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Abstract

This paper is motivated by real-life applications of bi-objective optimization. Having many non dominated solutions, one wishes to cluster the Pareto front using Euclidian distances. The p-center problems, both in the discrete and continuous versions, are proven solvable in polynomial time with a common dynamic programming algorithm. Having $N$ points to partition in $K\geqslant 3$ clusters, the complexity is proven in $O(KN\log N)$ (resp $O(KN\log^2 N)$) time and $O(KN)$ memory space for the continuous (resp discrete) $K$-center problem. $2$-center problems have complexities in $O(N\log N)$. To speed-up the algorithm, parallelization issues are discussed. A posteriori, these results allow an application inside multi-objective heuristics to archive partial Pareto Fronts.

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Nicolas Dupin, Frank Nielsen, El-Ghazali Talbi. 2019-08-19. Planar p-center problems are solvable in polynomial time when clustering a Pareto Front. https://arxiv.org/abs/1908.09648

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