Tidligere gjesteforelesninger og seminarer - Side 63

Tid og sted: , B1036

Dr. Alexander Schnurr (TU Dortmund) holder et seminar med tittelen: A Canonical Way to Derive Properties of Lévy-Type Processes

Tid og sted: , B 63 NHA

Et Eilenberg-Mac Lane rom K(G,n) er bestemt av å ha homotopigruppe G konsentrert i dimensjon n (og 0 ellers), og representerer n-te kohomologi med koeffisienter i G opp til homotopi. Barkonstruksjonen på K(G,n) gir et nytt rom BK(G,n)=K(G,n+1) som selv er en topologisk gruppe. Diagonalen G--->GxG og multiplikasjonen GxG--->G induserer en multiplikasjon på mod p homologigrupper, og gjør denne til en koalgebraisk ring (eller Hopf algebra). Jeg vil konstruere en spektralsekvens av Hopf algebraer (bar spektralsekvensen) som beregner homologi av K(G,n+1) gitt homologi av K(G,n) (for homologiteorier med en Künneth-formel), og vil så beregne mod p-homologi av K(Z,3)=BK(Z,2) som Hopf algebra.   

Tid og sted: , Seminar room 3508

Friday seminar by Juha Merilä

Tid og sted: , Rom 304 (Peisestua), Institutt for teoretisk astrofysikk

Signe Riemer-Sørensen, Post-Doctoral researcher, ITA

Tid og sted: , B1036

Professor Massimo Fornasier, from the Technical University of Munich, is visiting the department /CMA. This is his second lecture.

Tid og sted: , Seminar room 3508

Friday seminar by Nicholas Salamin

Tid og sted: , Rom 304 (Peisestua), Institutt for teoretisk astrofysikk

Mohamed Amedjkouh, Professor, Kjemisk institutt, UiO

Tid og sted: , B1036

Professor Massimo Fornasier, from the Technical University of Munich, is visiting the department /CMA and he will give two guest lectures.

Tid og sted: , Room 3508

CEES Extra seminars & One-on-one discussion

Tid og sted: , Seminar room 3508

Friday seminar by Ioan Negrutiu

Tid og sted: , Rom 304 (Peisestua), Institutt for teoretisk astrofysikk

Andreas Kääb, Professor, Department of Geosciences, UiO

Tid og sted: , Rom 304 (Peisestua), Institutt for teoretisk astrofysikk

Professor Trond H. Torsvik, Director Centre for Earth Evolution and Dynamics (CEED), University of Oslo  

Tid og sted: , Seminar room 3508

CEES Extra seminar by David Sloan Wilson

Tid og sted: , Aud. 4 Vilhelm Bjerknes house

Martin Jullum (Department of Mathematics, UiO), gives a seminar in  Auditorium 4, Vilhelm Bjerknes house, at 14:15, Tuesday March 4th: 

Parametric or Nonparametric: The Focused Information Criterion Approach

Tid og sted: , NHA B1036

Jan Martin Nordbotten (University of Bergen) will give a talk about

Finite volume methods for elasticity and poro-elasticity

Abstract: We introduce a new class of cell-centered finite volume methods for elasticity and poro-elasticity. This class of discretization methods has the advantage that the mechanical discretization is fully compatible (in terms of grid and variables) to the standard cell-centered finite volume discretizations that are prevailing for commercial simulation of multi-phase flows in porous media. 

For a specific variant of the proposed discretization, we give an overview of a convergence proof in the setting of isotropic elasticity, and address from a theoretical perspective the issues of a discrete Korn's inequality and robustness with respect to locking. Furthermore, we give numerical results for both structured and unstructured grids for both elasticity and poro-elasticity. The talk concludes with an application to simulation of fractured and fracturing porous media.  

Tid og sted: , Nils Henrik Abel's hus

Risk measures are set to quantify in terms of assets/money the amount of financial risk associated to a certain financial position. The purposes for such evaluations are many and interesting both from the investors perspectives and regulators. As example, these evaluations are important to quantify the amount of reserve that financial institutions, such as banks or insurance companies, have to set aside as hedging guarantee. In the recent years large attention is given towards convex and coherent risk measures.

A series of 10 lectures will be held by Prof. Giacomo Scandolo, Department of Mathematics, University of Verona (Italy), visiting scholar at our department.

The course is suggested to Master and PhD students in the area of Stochastic Analysis, Insurance, and Risk as well as practitioners in the area.

Tid og sted: , B1036

Torstein Nilssen (Universitetet i Oslo) holder et seminar med tittelen: Malliavin differentiability for a class of SDE's in Hilbert spaces.

Tid og sted: , B 63 NHA

A continuation of the previous talk.   

Tid og sted: , Ø279, Fysikkbygningen

Seminar by Dr. Fabrice Anizon, Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, France.

Tid og sted: , NHA B63

Magnus Landstad will give a talk with title: Quantum groups from almost matched pairs of groups - the groupoid approach

Abstract: If G is a locally compact group with two closed subgroups H,K s.t. G=HK, then (H,K) is called a matched pair of subgroups. The construction of a quantum group from such a pair goes back a long time. We shall look at the more general case where the subgroups are almost matched (the complement of HK in G has measure 0), then a groupoid approach to the construction is very useful and many formulas are obtained for free.

I shall start with explaining the concepts needed (quantum groups, groupoids, etc) and then how the groupoid is constructed. Finally we shall look at the special case where G has a compact open subgroup.

This is joint work with A. Van Daele.

 

 

Tid og sted: , NHA B1036

Dongho Chae (Chung-Ang University, Korea) will give a seminar talk entitled

On the self-similar blow-up for the compressible Euler equations

Abstract: The problem of finite time blow-up/global regularity of the 3D incompressible Euler equations is an outstanding problem in mathematical fluid mechanics. On the other hand, the scenario of self-similar type blow-up is a natural candidate of blow-ups in various nonlinear partial differential equations such as the porous medium equation and the nonlinear Schrödinger equations. We also mention that for the closely related incompressible Navier-Stokes equations the question of self-similar blow-up was raised by J. Leray in 1930, and was negatively answered by J. Necas, M. Ruzicka and V. Sverak in 1996. In this talk we present the progress of study during the last several years on the self-similar blow-up for the Euler equations.

Tid og sted: , NHA B1036

Johanna Ridder (University of Oslo) will give a talk about

Analysis of a finite difference method for two-dimensional incompressible magnetohydrodynamics

Abstract: We consider the magnetohydrodynamics equations for a viscous incompressible resistive fluid in two dimensions. For these equations we analyse a semi-discrete finite difference scheme that is based on a staggered grid and is energy preserving. We show an a priori H^1-bound and the convergence of the scheme.