Thumbnail

BCMA-ES II: revisiting Bayesian CMA-ES

Benhamou, Éric; Saltiel, David; Guez, Beatrice; Paris, Nicolas (2020), BCMA-ES II: revisiting Bayesian CMA-ES. https://basepub.dauphine.fr/handle/123456789/21207

View/Open
Type
Document de travail / Working paper
External document link
https://hal.archives-ouvertes.fr/hal-02886508
Date
2020
Series title
Preprint Lamsade
Published in
Paris
Metadata
Show full item record
Author(s)
Benhamou, Éric
Laboratoire d'analyse et modélisation de systèmes pour l'aide à la décision [LAMSADE]
Saltiel, David
Guez, Beatrice
Paris, Nicolas cc
Centre de Recherche en Informatique de Lens [CRIL]
Abstract (EN)
This paper revisits the Bayesian CMA-ES and provides updates for normal Wishart. It emphasizes the difference between a normal and normal inverse Wishart prior. After some computation, we prove that the only difference relies surprisingly in the expected covariance. We prove that the expected covariance should be lower in the normal Wishart prior model because of the convexity of the inverse. We present a mixture model that generalizes both normal Wishart and normal inverse Wishart model. We finally present various numerical experiments to compare both methods as well as the generalized method.
Subjects / Keywords
CMA ES; Bayesian; conjugate prior; normal Wishart; normal inverse Wishart; mixture models