On a Stochastic Differential Equation Approach for Multiobjective Optimization up to Pareto-Criticality

  • Ricardo H. C. Takahashi
  • Eduardo G. Carrano
  • Elizabeth F. Wanner
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6576)

Abstract

Traditional Evolutionary Multiobjective Optimization techniques, based on derivative-free dominance-based search, allowed the construction of efficient algorithms that work on rather arbitrary functions, leading to Pareto-set sample estimates obtained in a single algorithm run, covering large portions of the Pareto-set. However, these solutions hardly reach the exact Pareto-set, which means that Pareto-optimality conditions do not hold on them. Also, in problems with high-dimensional objective spaces, the dominance-based search techniques lose their efficiency, up to situations in which no useful solution is found. In this paper, it is shown that both effects have a common geometric structure. A gradient-based descent technique, which relies on the solution of a certain stochastic differential equation, is combined with a multiobjective line-search descent technique, leading to an algorithm that indicates a systematic solution for such problems. This algorithm is intended to serve as a proof of concept, allowing the comparison of the properties of the gradient-search principle with the dominance-search principle. It is shown that the gradient-based principle can be used to find solutions which are truly Pareto-critical, satisfying first-order conditions for Pareto-optimality, even for many-objective problems.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Ricardo H. C. Takahashi
    • 1
  • Eduardo G. Carrano
    • 2
  • Elizabeth F. Wanner
    • 2
  1. 1.Department of MathematicsUniversidade Federal de Minas GeraisBelo HorizonteBrazil
  2. 2.Department of Computer EngineeringCentro Federal de Educação Tecnológica de Minas GeraisBelo HorizonteBrazil

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