TITLE: Selected Topics in Planning under Uncertainty SPEAKER: Boris Defourny (Systems and Modeling Research Unit, University of Liège) ABSTRACT: The first part of the talk concerns sequential decision making under uncertainty and methods that use dynamic programming to find optimal policies. We will discuss how Bellman's principle limits the ways risk-awareness can be incorporated in sequential decision making, but also brings time-consistency. The second part of the talk concerns sequential decision making under uncertainty and methods that use stochastic programming to find optimal policies. The example of the newsvendor problem will serve to introduce the stochastic programming approach, and the issues raised by finite-dimensional approximations to stochastic programs. Then, I will present some recent work applying machine learning techniques and scenario-tree techniques from multistage stochastic programming to sequential decision making.