Events - Page 42

Yusuke Isono  from the University of Tokyo will give a talk with title: Strong solidity of II_1 factors of free quantum groups

Abstract:

We generalize Ozawa's bi-exactness to discrete quantum groups and give a new sufficient condition for strong solidity, which implies the absence of Cartan subalgebras. As a corollary, we prove that II_1 factors of free quantum groups are strongly solid. We also consider similar conditions on non-Kac type quantum groups, namely, non finite von Neumann algebras.

This years Skolem Lecture will be by Peter Aczel from The University of Manchester:

The Structure Identity Principle in Set Theory and Type Theory.

Prof. B. Rajeev (Indian Statistical Institute) holder et seminar med tittelen: Translation Invariant Diffusions

Erik Bédos will give a talk with title: On equivariant representations of C*-dynamical systems

Abstract:

Let \Sigma=(A, G, \alpha, \sigma) denote a unital discrete twisted C*-dynamical system. In our recent work with Roberto Conti (Rome), it has emerged that the so-called equivariant representations of \Sigma on Hilbert A-modules play an interesting role, complementing the one played by covariant representations. We will discuss some aspects of this notion and illustrate its usefulness in the study of the crossed products associated with \Sigma.

Nina Lange (Copenhagen Buisiness School) holder et seminar med tittelen: The correlation structure of exchange rates and commodity prices

The first Nordic Spring School in Logic is organized under the auspices of the Scandinavian Logic Society and is supported by the Department of Mathematics of the University of Oslo. (Download poster here - pdf)

Algebraic cobordism MGL was introduced by Voevodsky as an algebro-geometric analogue of complex cobordism MU: it is the universal oriented cohomology theory for smooth schemes. A fundamental result in homotopy theory is Quillen's identification of the homotopy groups of MU with the Lazard ring. Voevodsky conjectured an analogous result for MGL, and his conjecture was recently proved for regular schemes of characteristic zero and up to p-torsion for regular schemes of charateristic p>0. I will explain Voevodsky's conjecture and sketch the proof in these cases.

Arbitrarily high order numerical schemes that converge to entropy measure valued solutions of systems of hyperbolic conservation laws.

Abstract: We will give a brief introduction to motivic homotopy theory followed by a discussion on how a theorem of Gabber may be used to avoid assuming that resolution of singularities holds in positive characteristic. The first half will be aimed at a general audience of topologists. The second will feature more algebraic geometry, however we will still try and keep it accessible to topologists.

Analysis and Application of Polygonal and Serendipity Finite Element Methods

Nils Detering (Frankfurt School of Finance & Management) holder et seminar med tittelen: Pricing & hedging asian-style options in energy

Philip Jonathan (Shell Projects & Technology, U.K. and Lancaster University) and David Randell (Shell Projects & Technology  and Durham University) will give two talks:

Modelling extreme environments

and

Locating and quantifying gas emission sources using remotely obtained concentration data

Wave measurements are traditionally performed in one of two locations: either at the sea surface or from below the surface. Both have their challenges and benefits.

Nortek is among those offering a subsurface wave measurement solution. This is done with acoustic Doppler current profilers. The presentation will discuss how subsurface wave measurements have evolved in the last decade. An emphasis will be placed on the challenges that exist and what has been done to expand the limits and improve the performance.

Asma Khedher (Technische Universität München) holder et seminar med tittelen: Stationarity of Ornstein-Uhlenbeck processes with stochastic speed of mean reversion

Adam Skalski (IMPAN) will give a talk with title: Closed quantum subgroups of locally compact quantum groups and some questions of noncommutative harmonic analysis (based on joint work with Matt Daws, Pawel Kasprzak and Piotr Soltan)

Abstract: The notion of a closed subgroup of a locally compact group is a very straightforward concept, often featuring in classical harmonic analysis. I will discuss the possible extensions of this notion to the quantum setting, focusing on the comparison of the two definitions proposed by S. Vaes and S.L.  Woronowicz. I will describe some reformulations of these definitions and explain how they can beshown to be equivalent in many cases; I will also mention certain connections to other problems of quantum harmonic analysis.  

CANCELLED: Almut Veraart (Imperial College) holder et seminar med tittelen: Integer-Valued Trawl Processes: A Class of Stationary Infinitely Divisible Processes

Nicolai Stammeier, Westfälische Wilhelms-Universität Münster, will give a talk with title: Product Systems of Finite Type for Certain Algebraic Dynamics and their C*-algebras

Abstract: Let P be a lattice-ordered semigroup with unit acting on a discrete, abelian group G by injective endomorphisms with finite cokernel. Building on the work of Jeong Hee Hong, Nadia S. Larsen and Wojciech Szymanski on product systems of Hilbert bimodules and their KMS-states, one can associate a product system to this dynamical system that turns out to be of finite type. Imposing two additional conditions on the dynamics, namely independence of the endomorphisms for relatively prime elements in P and exactness, we derive presentations of the Nica-Toeplitz algebra and the Cuntz-Nica-Pimsner algebra. Moreover, the latter has lots of nice descriptions and is shown to be a unital UCT Kirchberg algebra.  

Kristina R. Dahl (Universitetet i Oslo) holder et seminar med tittelen: Duality methods for pricing contingent claims under short selling constraints

Paul Krühner (Universitetet i Oslo) holder et seminar med tittelen: On infinite dimensional modelling in electricity finance

Peter Müller (Division of Statistics + Scientific Computation, The University of Texas at Austin) will talk about

A Nonparametric Bayesian Model for Local Clustering

Sara Blanco (Universitetet i Oslo) holder et seminar med tittelen: Forwards and spots in energy markets modelled by Lévy Semistationary Processes.