Theoretically investigating optimal µ-distributions for the hypervolume indicator: first results for three objectives

  • Authors:
  • Anne Auger;Johannes Bader;Dimo Brockhoff

  • Affiliations:
  • INRIA Saclay, LRI, Paris Sud University, Orsay Cedex, France;Computer Engineering and Networks Lab, ETH Zurich, Zurich, Switzerland;INRIA Saclay, LRI, Paris Sud University, Orsay Cedex, France

  • Venue:
  • PPSN'10 Proceedings of the 11th international conference on Parallel problem solving from nature: Part I
  • Year:
  • 2010

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Abstract

Several indicator-based evolutionary multiobjective optimization algorithms have been proposed in the literature. The notion of optimal µ-distributions formalizes the optimization goal of such algorithms: find a set of µ solutions that maximizes the underlying indicator among all sets with µ solutions. In particular for the often used hypervolume indicator, optimal µ-distributions have been theoretically analyzed recently. All those results, however, cope with bi-objective problems only. It is the main goal of this paper to extend some of the results to the 3-objective case. This generalization is shown to be not straight-forward as a solution's hypervolume contribution has not a simple geometric shape anymore in opposition to the bi-objective case where it is always rectangular. In addition, we investigate the influence of the reference point on optimal µ-distributions and prove that also in the 3-objective case situations exist for which the Pareto front's extreme points cannot be guaranteed in optimal µ-distributions.