Department of Computer Science | Institute of Theoretical Computer Science | CADMO

Theory of Combinatorial Algorithms

Prof. Emo Welzl and Prof. Bernd Gärtner

Mittagsseminar (in cooperation with M. Ghaffari, A. Steger and B. Sudakov)

Mittagsseminar Talk Information

Date and Time: Thursday, October 17, 2013, 12:15 pm

Duration: 30 minutes

Location: CAB G51

Speaker: Sebastian Stich

Natural Gradient in Evolution Strategies

In derivative-free optimization one aims at minimizing an unknown objective function. The only information accessible are algorithm-selected function measurements. Evolution Strategies (ES) are among the state of the art heuristics for this optimization problem. ES typically use parametrized probability distributions to generate correlated samples in promising regions.

Recently, it was shown that applying gradient descent in the parameter space of the search distribution leads to algorithms that are very similar to the most successful ES. The development of those so-called Natural Evolution Strategies (NES) provided new insights into the classical ES and started promising new theoretical investigations.

This still on-going research lead to the Information-Geometric-Optimization (IGO) framework, which tries to capture all ES in an unifying picture.

We present NES and give an introduction to the IGO framework.

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