Tidlegare gjesteforelesninger og seminarer - Side 36
Pedro Capelo, Center for Theoretical Astrophysics and Cosmology, Institute for Computational Science, University of Zurich
Rebecka Jörnsten (Division of Applied Mathematics and Statistics, University of Gothenburg / Chalmers University of Techology) will give a talk on September 28th at 9:15 in the Seminar Room 819, Niels Henrik Abels hus, 8th floor.
By Brian O’Neill from the Josef Korbel School of International Studies at the University of Denver, USA
By Scott A. Taylor from University of Colorado Boulder
Giuliana Cortese (Department of Statistical Sciences, University of Padova) will give a talk on September 25th at 14:15 in the Seminar Room 819, Niels Henrik Abels hus, 8th floor.
Matematisk Institutt ved Universitetet i Oslo ønsker deg med dette velkommen til en forsikringsdag der noen av landets topp fagfolk vil ta deg med gjennom noen av de mest dagsaktuelle emner innen forsikring.
Vi er er landets ledende leverandør av aktuarer og finansmatematikere til forsikrings- og finansnæringen og også det ledende forskningsenter på disse feltene.
By Steve Chenoweth from the University of Queensland, St Lucia, Australia, and the Swedish Collegium for Advanced Studies, Uppsala, Sweden
Daniel Nóbrega Siverio, postdoc ITA
From Birkeland’s Gun to Cosmic Accelerators.
Electromagnetic and Electrostatic Wave Acceleration of Matter.
Professor Rickard Lundin, Swedish Institute of Space Physics.
Leave the lunch box at home - the "Felleskollokvium" is back.
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.
Carsten van de Bruck, Professor University of Sheffield
Title: Taming nonlinear dynamics using Deep Reinforcement Learning
by: Jean Rabault, Miroslav Kuchta, Ulysse Réglade 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
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.
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.