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Nombre de programmes trouvés : 9674

le (1h1m11s)

Xavier Cabré : Nonlinear elliptic and Fisher-KPP equations with fractional diffusion

Premier atelier de l'ERC « Reaction-Diffusion Equations, Propagations and Modelling »  Journées d'étude organisées par Henri Berestycki et Jean-Michel Roquejoffre  EHESS, 24-25 septembre 2013Xavier Cabré 2 (ICREA and UPC, Barcelona) Nonlinear elliptic and Fisher-KPP equations with fractional diffusion I will first describe the basic ideas concerning fractional Laplacians, as well as the essential tools to treat nonlinear equations involving   these operators. I will then present recent results on fractional   semilinear elliptic equations (mainly of Allen-Cahn type) and on front propagation for fractional Fisher-KPP type equations.
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le (1h1m6s)

Bubeck 2/9 - Some geometric aspects of randomized online decision making

This course is concerned with some of the canonical non-stochastic models of online decision making. These models have their origin in works from the 1950's and 1960's, and went through a resurgence in the mid-2000's due to many applications in the internet economy. This course focuses on a set of challenging conjectures around these models from the 1980's and 1990's. We present a unified approach based on a combination of convex optimization techniques together with powerful probabilistic tools, which will allow us to derive state of the art results in online learning, bandit optimization, as well as some classical online ...
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