Tidlegare gjesteforelesninger og seminarer - Side 55

Alfons van Daele (Leuven) will give a talk with title: The Haar measure on quantum groups

Abstract: At this moment, there is no theory of locally compact quantum groups with axioms from which one can prove the existence of the Haar weights. In general, the existence is part of the axioms. There are however a few cases where the existence can be proven. This is true for compact quantum groups and for discrete quantum groups. We will discuss some aspects of these proofs and see which of them are useful in the general case.

Prof. Paul Switzer (Stanford, Dept. of Statistics) will give a seminar in the lunch area, 8th floor N.H. Abel's House at 14:15 October 20th.

Hydrodynamics and adhesion of soft interfaces

Jan Heuschele, post doc, AQUA, IBV

David Ruiz Baños gives a talk with the title: "Optimal bounds and Hölder continuous densities of solutions of SDEs with measurable and path-dependent drift coefficients"

Viggo Hansteen, Professor, ITA

Francesco Cavazzani, Harvard University, gives the Seminar in Algebra and Algebraic Geometry:

Complete twisted cubics

Prof. Alan Gelfand (Duke University, Dept. of Statistical Science) will give a seminar in room 108, ground floor N.H. Abel's Building at 15:15 October 13th.

Prof. Mike West (Duke University, Dept. of Statistical Science) will give a seminar in room 108, ground floor N.H. Abel's House at 14:15 October 13th.

Ingrid Hobæk Haff is giving her inaugural lecture with the title: Parameter estimation for pair-copula constructions.

Sven Wedemeyer, Researcher - Institute of Theoretical Astrophysics

Mathematical Institute, University of Oxford

Friday seminar by Chris Thomas from Department of Biology, University of York, UK

Geir Ellingsrud, Professor, Mathematics Department, UiO 

Martin Gulbrandsen, UiS, gives the Seminar in Algebra and Algebraic Geometry

The dual cell complex of Hilbert scheme degenerations  

Judith Packer, University of Colorado (Boulder), USA, will give a talk with title: Wavelets associated to representations of higher-rank graph C*-algebras

Abstract: Let $\Lambda$ denote a finite $k$-graph in the sense of A. Kumjian and D. Pask that is strongly connected, and let $\Lambda^{\infty}$ denote its infinite path space. I discuss some recent joint work with C. Farsi, E. Gillaspy, and S. Kang, where we construct a system of functions that we call ``wavelets" on a Hilbert space of square-integrable functions on $\Lambda^{\infty}.$ In so doing, we generalize work of M. Marcolli and A. Paolucci for finite directed graphs to the higher rank case. The key tool is the construction of a representation of the graph $C^*$-algebra $C^{\ast}(\Lambda)$ on $L^2(\Lambda^{\infty},M)$ for the appropriate measure $M.$ When the finite $k$-graph $\Lambda$ in question is strongly connected and aperiodic, the representation of $C^{\ast}(\Lambda)$ that we obtain is faithful.

Fabian Krüger (Heidelberg Institute for Theoretical Studies) will give a 30 min seminar in the lunch area, 8th floor N.H. Abel's House at 14:45 September 29th.

Monica Musio (University of Cagliari) will give a 30 min seminar in the lunch area, 8th floor N.H. Abel's House at 14:15 September 29th.

Shinji Mukohyama, Yukawa Institute for Theoretical Physics, Kyoto University

Antoine Julien, NTNU, will give a talk with title: Links between cut-and-project tilings and Diophantine approximation

Abstract: Cut-and-project tilings are obtained by cutting a slice of a higher dimensional lattice and projecting it on a lower dimensional space. The result is a point set which is regular enough (since it originates from a lattice), but is not periodic, provided the direction of the slice is irrational in a suitable sense. In one dimension, typical examples of this construction are Sturmian subshifts. It is known that some of their dynamical properties depend on the arithmetic properties of a certain parameter. In this talk, I will recall some known results by Hedlund and Morse on Sturmian subshifts. Then, I will describe how, even in higher dimensions, the repetition properties of some cut-and-project sets can be linked to problems of simultaneous Diophantine approximation. This is joint work with A. Haynes, H. Koivusalo and J. Walton. 

Dr. Terry Onsager, National Oceanic and Atmospheric Administration, USA/Space Weather Prediction Center, USA.

Kristian Ranestad, UiO, gives the Seminar in Algebra and Algebraic Geometry

EPW cubes

Friday seminar by Anna B. Neuheimer, Department of Oceanography, University of Hawai’i at Mānoa, USA

Luc Van Der Voort, Professor, ITA