Gjesteforelesninger og seminarer - Side 38

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

Geir Ellingsrud fortsetter seminaret om 4-mangfoldigheter

Vi vil gi en kortfattet intoduksjon til  algebraiske flater og en like kortfattet oversikt over Enriques-Kodaira klassifikasjonen.

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

Kristoffer Herland Hellton (Department of Biostatistics, UiO) will talk about

Consistency in high-dimensional principal component analysis

Bjørn Jahren fortsetter seminaret om 4-mangfoldigheter i uke 8

(ikke seminar i uke 7).

Marcus K. V. Eriksson (Universitetet i Oslo) holder et seminar med tittelen: A valuation model with minimal and maximal constraints for swing options.

Roberto Conti, Universita La Sapienza (Rome), Italy, will give a talk with title: The dark side of the Cuntz algebras

Abstract: We provide an overview of our recent work on the automorphism group of Cuntz algebras and discuss a number of open problems. (Joint work with J.H. Hong and W. Szymanski).

Benjamin Holcblat (Department of Financial Economics, BI) will talk about

A Classical Moment-Based Approach with Bayesian Properties: Econometric Theory and Empirical Evidence from Asset Pricing

Gunther Cornelissen, Utrecht University (The Netherlands) will give a talk with title "Dynamical systems and point counting"

Abstract: Counting the points of a curve over finite fields doesn't determine the curve up to isomorphism; this is analogous to the famous fact that you cannot "hear the shape of a drum". I will show how to remedy this by counting points in a weighted way (namely, using abelian L-series). The method of proof is through the theory of dynamical systems, and - curiously - arose from a study of a quantum statistical mechanical system.  

Makoto Yamashita, p.t. University of Copenhagen, will give a talk with title "Tannaka-Krein duality of quantum homogeneous spaces"

Abstract: We study ergodic actions of compact quantum groups on operator algebras  (quantum homogeneous spaces) from the categorical point of view. The language of Rep(G)-module C*-categories gives a reconstruction theorem of quantum homogeneous spaces, which also captures the equivariant Morita equivalence and the equivariant homomorphisms.  For the case of quantum SU(2), the universality of Rep(SUq(2)) allows us to obtain a combinatorial description of quantum homogeneous spaces and their properties. Based on joint work with Kenny De Commer (arXiv:1211.6552, arXiv:1212.3413).  

Bjørn Jahren fortsetter seminaret om 4-mangfoldigheter.

Rama Cont (Imperial College) holder et seminar med tittelen: Functional Ito calculus and functional Kolmogorov equations

Magnus Dahler Norling, UiO, will give a talk with title: The K-theory of some reduced inverse semigroup C*-algebras

Abstract: We use a recent result by Cuntz, Echterhoff and Li about the K-theory of certain reduced C*-crossed products to describe the K-theory of C*_r(S) when S is an inverse semigroup satisfying certain requirements. A result of Milan and Steinberg allows us to show that C*_r(S) is Morita equivalent to a crossed product of the type handled by Cuntz, Echterhoff and Li. We apply the results to graph inverse semigroups and the inverse semigroups of one-dimensional tilings.

Michael Scheuerer will talk about (Institute of Applied Mathematics, Heidelberg University)

Statistical post-processing of weather forecasts: The importance of spatial modeling

Dette semesteret arrangerer vi et seminar om 4-mangfoldigheter, et felt som burde interessere både topologer og algebraiskgeometere. Dessuten, siden vi nå er i samme avdeling, bør vi jo ha noe felles aktivitet. Et overordnet mål er å studere komplekse flater opp til diffeomorfi. Det konkrete programmet vil bli til underveis, men emner vi regner med å komme innom inkluderer - Topologisk klassifikasjon av enkeltsammenhengende, kompakte   4-mangfoldigheter (Freedman) - Donaldsons teorem om snittformen til differensiable 4-mangfoldigheter - Enriques-Kodaira klassifikasjon av komplekse flater - Seiberg-Witten teori.

Vi starter opp mandag 28. januar 1415-1600 i B70 med at Bjørn snakker om snittformen og den topologiske teorien. Bjørn Jahren og Geir Ellingsrud

Program for the seminar in Logic, Spring 2013

Donna Mary Salopek (Uni. South Wales) holder et seminar med tittelen: Stochastic Evolution Equations driven by Liouville Fractional Brownian motion

Benedykt Szozda (Uni. Aarhus) holder et seminar med tittelen: Anticipative extension of the Ito integral

Thomas Jaki (Department of Mathematics and Statistics, Lancaster University) will talk about

Designing multi-arm multi-stage clinical studies

Matthew Sperrin (Department of Mathematics and Statistics, Lancaster University) will talk about

Modelling the effect of interventions on onset and progression of chronic disease

Fred Shultz, Wellesley College, USA will give a talk with title "Decomposing separable states".

This is the first in a joint seminar series organised by the Operator Algebra group (UiO), Several Complex Variable group (UiO) and the CAS group.  The plan is to have seminars every other week.  

Abstract: This talk will begin with a brief introduction to entanglement and its applications, since that motivates the mathematics to be discussed.  In the title of this talk, a state is a positive linear functional on the tensor product of the algebras of m x m and n x n complex matrices.  Such a state is separable if it is a convex combination of product states. An interesting open problem is to give a useful criterion for a state to be separable. A related problem is to give a systematic way to find a decomposition of a separable state into a convex combination of product states.  This talk will describe such a decomposition for a class of separable states that is of both physical and mathematical interest.  This decomposition is also applicable to a class of completely positive maps (which correspond to certain quantum channels). This is joint work with Erik Alfsen.