Gjesteforelesninger og seminarer - Side 25

Sam Efromovich (Department of Mathematical Sciences, University of Texas at Dallas, USA) will give a talk on May 21st at 14:15 in the Erling Sverdrups plass, Niels Henrik Abels hus, 8th floor.

Ulrik Enstad (University of Oslo) will give a talk titled: Heisenberg modules and the existence (or lack thereof) of Gabor frames

Subtle Stiefel-Whitney classes have been introduced by Smirnov and Vishik as a tool for classifying quadratic forms. Following this path, in this talk, I will introduce subtle characteristic classes for Hermitian forms, coming from the motivic cohomology ring of the Nisnevich classifying space of the unitary group associated to the standard split Hermitian form of a quadratic extension. Moreover, I will discuss the connection between these new classes and the subtle Stiefel-Whitney ones, deduce information on the kernel invariant for quadratic forms divisible by a 1-fold Pfister form, show that these classes see the triviality of Hermitian forms and express the motive of the torsor associated to a Hermitian form in terms of its subtle characteristic classes.  

The 4th Scandinavian Gathering Around Remarkable Discrete Mathematics

Professor Emanuela Rosazza-Gianin from University of Milano Bicocca will give a lecture with the following title

Dynamic robust Orlicz premia and Haezendonck-Goovaerts risk measures

Seung-Hyeok Kye (Seoul National University, Korea) will give a talk titled: Indecomposable exposed multi-linear maps and separable states with unique decomposition.

Andreas Mayr (Department of Medical Biometry, Informatics and Epidemiology, Rheinische Friedrich-Wilhelms-Universität of Bonn, GER) will give a talk on May 7th at 14:15 in the Erling Sverdrups plass, Niels Henrik Abels hus, 8th floor.

Professor Habib Ouerdiane from University of Tunis El Manar, Tunisia, will give a minicourse in three lectures with the following title:

Stochastic and Infinite Dimensional Analysis

Roberto Conti (Sapienza University of Rome, Italy) will give a talk titled: Endomorphisms of simple C*-algebras generated by isometries.

Vegard Antun (Department of Mathematics, University of Oslo) will give a talk on April 23rd at 14:15 in the Erling Sverdrups plass, Niels Henrik Abels hus, 8th floor.

Aldo Solari (Department of Economics, Quantitative Methods and Management, University of Milano-Bicocca, ITA) will give a talk on April 9th at 14:15 in the Erling Sverdrups plass, Niels Henrik Abels hus, 8th floor.

There are several cohomology theories over a field like Hodge cohomology theory that are not A1-invariant but still having other fundamental properties like the Projective bundle formula. These are not representable in DM. I will explain how to extend DM to include them using log geometry and cube-invariance. Some fundamental properties like Gysin triangles and blow-up triangles will be also discussed. This is joint with Federico Binda and Paul Arne Østvær.  

In preparation for the MHE seminar "log motives over a field", we give an introduction to ongoing work on motives for log schemes over fields. This is joint with Doosung Park and Paul Arne Østvær.