Tidligere arrangementer - Side 74

Prof. Masaki Izumi, Kyoto University, Japan, will give a talk with title:

The classification of poly-Z group actions on Kirchberg algebras

Abstract: We completely classify outer actions of a poly-Z group G on any Kirchberg algebra A in terms of a principal Aut(A x K)-bundle over the classifying space BG. This is joint work with Hiroki Matui.

Becky Armstrong, University of Sydney, Australia, will give a talk with title:

Simple graph algebras

Abstract: Since their introduction twenty years ago, C*-algebras associated to directed graphs have become a popular tool for investigating various classes of C*-algebras, because analytical properties of these C*-algebras depend on much simpler combinatorial properties of the underlying graphs. One such analytical property is simplicity, which plays a fundamental role in the classification program for C*-algebras. In this talk I will first recall the characterisation of simplicity for directed graph C*-algebras. I will then describe the results of my PhD research, in which I characterise simplicity of twisted C*-algebras of topological higher-rank graphs in terms of the underlying graphical and cohomological data. These C*-algebras are constructed using groupoid techniques for the purpose of this simplicity characterisation, but I will also briefly describe two product-system models for twisted C*-algebras of topological higher-rank graphs. (This is joint work with my PhD supervisors, Nathan Brownlowe and Aidan Sims.)

Geoff Nicholls (Department of Statistics, University of Oxford) and Idris Eckley (Mathematics and Statistics, Lancaster University) will both give a talk on September 17th, at 13:45 and 14:45, respectively, in the Seminar Room 819, Niels Henrik Abels hus, 8th floor.

ESOP seminar. Grischa Perino is a Professor at the University of Hamburg. He will present a paper entitled "For ¡°better¡± or ¡°worse¡±: a new life-satisfaction measure able to elicit preference rankings", co-authored by Sonja K?ke.

Carsten van de Bruck, Professor University of Sheffield 

ESOP seminar. Tommaso Porzio is an Assistant Professor of Economics at the University of California, San Diego. He will present a paper entitled "Why Do Spational Wage Gaps Persist? Evidence from the Enduring Divide between East and West Germany", co-authored by Sebastian Heise.

Title: Taming nonlinear dynamics using Deep Reinforcement Learning

by: Jean Rabault, Miroslav Kuchta, Ulysse R¨¦glade and Nicolas Cerardi

Abstract: Machine Learning (ML) methods are a promising way to perform optimal control. In a recent book ('Machine Learning Control - Taming Nonlinear Dynamics and Turbulence', Duriez et. al., 2017), several ML methods were presented as well as a couple of benchmarks. One particular benchmark is a small system of ODEs that present features, such as multimodality and cross-talks, that are representative of more complex systems found in Fluid Mechanics.

In this seminar, we present ongoing work about active control of this system of ODEs.

We will have a ¡°mingle¡± meeting. There will be updates from Kristine and Per on the running of the institute. But fear not, there will also be plenty of time for informal chat and eating of cake. All are welcome to the lobby on the first floor.

Bill Forman, CfA - Harvard

Effekten av ulike legemidler er ofte usikker. Hvordan b?r myndighetene h?ndtere denne usikkerheten? Hvilke analyser skal de kreve n?r de behandler s?knader om godkjenning og refusjon? Hva slags analyser kreves i dag og  b?r kravene i endres? B?r graden av usikkerhet p?virke prisen?

Paolo Vidoni (Department of Economics and Statistics, University of Udine) will give a talk on September 4th at 14:15 in the Seminar Room 819, Niels Henrik Abels hus, 8th floor.

Karsten Specht (University of Bergen) will lecture on Rhythm, Tempo, and the Brain: fMRI studies in Bergen

ESOP seminar. Gregor Jarosch is an Assistant Professor at Princeton University. He will present a paper entitled "Learning from coworkers", co-authored by Ezra Oberfield and Esteban Rossi-Hansberg.

Hakon Dahle, ITA

The Mahowald invariant is a method for constructing nontrivial classes in the stable homotopy groups of spheres from lower dimensional classes. I will introduce this construction and recall Mahowald and Ravenel's computation of the Mahowald invariant of 2^i for all i . I'll then introduce motivic and equivariant analogs of the Mahowald invariant, outline the computation of the generalized Mahowald invariants of 2^i and \eta^i for all i , and discuss the relationship between these generalized computations and exotic periodicity in the equivariant and motivic stable homotopy groups of spheres.

Joop Schaye, Leiden University

Branko Milanovic presents ''Capitalism now : an informal discussion of the forthcoming book''