Genericity of the fixed point set for the infinite population genetic algorithm

  • Authors:
  • Tomáš Gedeon;Christina Hayes;Richard Swanson

  • Affiliations:
  • Department of Mathematical Sciences, Montana State University, Bozeman, MT;Department of Mathematics, Gettysburg Collge, Gettysburg, PA;Department of Mathematical Sciences, Montana State University, Bozeman, MT

  • Venue:
  • FOGA'07 Proceedings of the 9th international conference on Foundations of genetic algorithms
  • Year:
  • 2007

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Abstract

The infinite populationmodel for the genetic algorithm,where the iteration of the genetic algorithm corresponds to an iteration of a map G, is a discrete dynamical system. The map G is a composition of a selection operator and a mixing operator, where the latter models the effects of both mutation and crossover. This paper shows that for a typical mixing operator, the fixed point set of G is finite. That is, an arbitrarily small perturbation of the mixing operator will result in a map G with finitely many fixed points. Further, any sufficiently small perturbation of the mixing operator preserves the finiteness of the fixed point set.