Tidligere gjesteforelesninger og seminarer - Side 64

Emily Freeland, postdoc at OCK/Stockholm University.

Professor B. Rajeev (India Statistical Institute, Bangalore) holder et seminar med tittelen: The Monotonicity Inequality on Hermite-Sobolev spaces.

Veileder du studenter? Synes du ansvaret er overveldende? Vet du hvordan du skal unngå problemer, eller løse dem hvis de oppstår?

In 1980 R. W. Thomason published a proof that CAT, the category of small categories, is a proper closed model category that is Quillen equivalent to SSet, the category of simplicial sets, with the standard model structure defined by Quillen. D-C Cisinski has since corrected the proof of left properness by replacing the central term of Dwyer morphism - a class of morphisms that Thomason believed to be the cofibrations - with a rough analogue in CAT of the NDR-pairs. The cofibrations, then, which are all retracts of Dwyer morphisms, are really the NDR-pair analogues. I will go through the main parts of Thomason's argument, incorporating Cisinski's adjustment, point out Thomason's mistake and here and there use more recent terminology from M. Hovey's book Model Categories. Towards the end I'll compare Thomason's method with modern, standardized ways of confirming a cofibrantly generated (closed) model structure, like the necessary and sufficient conditions listed in Hovey's Model Categories (thm. 2.1.19) and transferring a model structure across an adjunction by using Kan's lemma on transfer and similar results 

Friday seminar by Bart Pollux

Nils Chr. Stenseth, Professor of Ecology and Evolution at Department of Biosciences, University of Oslo  

Antoine Julien (NTNU) will give a talk with title: Tiling spaces, groupoids and K-theory

Abstract:

 In this talk, I will describe how spaces, groupoids and C*-algebras can be associated with aperiodic tilings. In some cases, it is possible to describe the structure of the groupoid combinatorially in terms of augmented Bratteli diagrams. (joint work with Jean Savinien) Time permitting, I will expose a strategy for computing the K-theory of the tiling algebra in terms of the K-theory of AF-algebras (work in progress).

Friday seminar by Jakob Hemmer Hansen

Shahin Jafarzadeh, Post-Doctoral Researcher, ITA

David Ruiz Baños (University of Oslo) holder et seminar med tittelen: On the regularity of densities of SDE's. A classical solution to the stochastic transport equation

Jeonghun J. Lee (Aalto University, Helsinki) will give a talk about

On unified analysis of mixed methods for elasticity with weakly symmetric stress.

Abstract: We introduce a framework to construct and analyze mixed finite elements for elasticity with weakly symmetric stress. The framework is based on a connection between mixed methods for elasticity and mixed methods for Stokes equations. We show that some new finite elements can be obtained from it with optimal error bounds.

Friday seminar by Wolfram M. Kürschner

Rajib Dutta (University of Oslo) will give a seminar talk on

Operator splitting methods for Benjamin-Ono (BO) equation

Abstract: We consider the BO equation which describes one-dimensional internal waves in deep water. In this talk, we show that both Godunov and Strang splitting methods converge with the expected rates if the initial data are sufficiently smooth. We also present a proof of convergence of a fully discrete finite difference scheme for this equation.  

Takuya Takeishi, University of Tokyo, will give a talk with title: Bost-Connes system for local fields of characteristic zero

Abstract: The Bost-Connes system, which describes the relation between quantum statistical mechanics and class field theory, was first constructed by Bost and Connes for the rational field, and generalized for arbitrary number fields by the contribution of many researchers. In this talk, we will introduce a generalization of the Bost-Connes sysmtem for local fields of characteristic zero, and introduce some properties.

Friday seminar by Merete Eggesbø

Terje Berntsen, Professor Dept. of Geosciences, University of Oslo

Prof. Dr. Stefan Ankirchner (University of Bonn) holder et seminar med tittelen: The Skorokhod embedding problem for homogeneous diffusions and applications to stopping contests

The 14th Annual Winter School of eVITA/SINTEF will be held January 19-24th 2014 in Geilo. The topic for the 2014 school is Big data challenges to modern statistics, with several internationally renowned experts giving a series of lectures on the subject.  Read more on the SINTEF website of the winter school (external link).  

 Knut Christian Myhre, Postdoktor - Sosialantropologisk institutt

The logic seminar will take place in B63 in NHA on Thursdays from 10.15 to 12.00.

The program is tentative. There are free slots in the program. Contact Dag Normann for suggestions or questions.

Hanna Zdanowicz (Univeritetet i Oslo) holder et seminar med tittelen: Pricing of energy spread options by Fourier transform

Giuseppe Coclite, University of Bari.

In this lecture we consider a model for the harvesting of marine  resources, described by a parabolic equation. Since the cost functionals have sublinear growth with respect to the  pointwise intensity of fishing effort, optimal solutions are in general measure-valued. For the control problem, we prove the existence of optimal strategies. The results were obtained in collaboration with Professor Mauro  Garavello.  

Bhavna Rathore, PhD Student, ITA

CEES Extra seminar by Anne Laudisoit