Technion, IEM faculty - Seminar in Probability and Stochastic Processes Speaker: Julien Berestycki, Universite Pierre et Marie Curie. Title: Effect of selection on genealogies Date: 13/12/2011 Time: 11:30 Place: Hashmal-861 Abstract: <http://ie.technion.ac.il/seminar_files/1322738835_B.txt> Or read it here: Let us consider a model in which particles move in space and branch independently of one another but on which a selection mechanism is acting to keep the population size essentially constant. Several such models have recently been investigated by physicists (Brunet, Derrida et al.). Non-rigorous arguments led them to formulate several remarkable predictions. In particular they argued that the asymptotic genealogy of the particles should be a universal object: the Bolthausen-Sznitman coalescent. I will give an overview of some of those conjectures as well as some recent related rigorous results. (Based on joint work with N. Berestycki and J. Schweinsberg). --------------------------------------------------------- Technion Math. Net (TECHMATH) Editor: Michael Cwikel <techm@math.technion.ac.il> Announcement from: <rami@.technion.ac.il>