Convergence Properties of Evolution Strategies with the Derandomized 
Covariance Matrix Adaptation: The (mu/mu_I, lambda)-CMA-ES 

   Nikolaus Hansen and Andreas Ostermeier

 ABSTRACT: The intermediate (center of mass) recombination of object parameters
 is introduced in the evolution strategy with derandomized covariance
 matrix adaptation (CMA-ES). On various (unimodal) real space fitness
 functions convergence properties and robustness against distorted
 selection are tested for different parent numbers. Introducing
 (mu/mu_I,lambda)-selection significantly improves
 robustness and has comparatively minor influence on the convergence
 speed of the CMA-ES.

In: EUFIT'97, 5th Europ. Congr. on Intelligent 
    Techniques and Soft Computing, Proceedings:650--654.