Geometry Seminar
Meetings are on Wednesday at 15:45 in HG G 43 (Hermann-Weyl-Zimmer)
Spring Semester 2012
| Date |
Speaker |
Title |
Time |
Location |
| 22-feb-2012 (wed) |
Jens Marklof
|
Eigenfunctions of polygonal billiards
|
15:45-16:45 |
HG G 43 |
| Abstract: |
Despite their simple geometry, billiards in polygons give rise to a rich variety of dynamical phenomena. One example is the asymptotic distribution of closed billiard trajectories, which is still only partially understood. In the present lecture I will discuss a different natural problem: the distribution of eigenfunctions of the Dirichlet Laplacian of a polygon---is the L^2 mass of the eigenfunctions highly localized or equidistributed on the billiard domain? The lecture is based on joint work with Zeev Rudnick (Tel Aviv). |
| Speakers: |
Prof. Dr. Jens Marklof
(University of Bristol, UK)
|
|
| 29-feb-2012 (wed) |
Urs Lang
|
Injective hulls of metric spaces: old and new
|
15:45-16:45 |
HG G 43 |
| Speakers: |
Urs Lang
(ETH Zürich, Switzerland)
|
|
| 7-mar-2012 (wed) |
Pierre Py
|
An equivariant deformation of the hyperbolic space
|
15:45-16:45 |
HG G 43 |
| Abstract: |
I will explain how to construct a continuous family of ''exotic'' locally compact CAT(−1) spaces with cocompact isometry groups all isomorphic to the isometry group of the real hyperbolic space H^n. This is joint work with Nicolas Monod. |
| Speakers: |
Pierre Py
(University of Strasbourg, France)
|
|
| 14-mar-2012 (wed) |
|
|
15:45-16:45 |
HG G 43 |
|
|
| 21-mar-2012 (wed) |
|
|
15:45-16:45 |
HG G 43 |
|
|
| 28-mar-2012 (wed) |
|
|
15:45-16:45 |
HG G 43 |
|
|
| 4-apr-2012 (wed) |
Péter Varjú
|
Random walks in Euclidean space
|
15:45-16:45 |
HG G 43 |
| Abstract: |
Consider a finite set of isometries of Euclidean space. Take several independent random elements of this set, and compute the image of the origin under their product. This gives rise to a probability distribution on Euclidean space. I will report on a result describing the local behavior of this measure. |
| Speakers: |
Dr. Péter Varjú
(Hebrew University, Israel)
|
|
| 18-apr-2012 (wed) |
|
|
15:45-16:45 |
HG G 43 |
|
|
| 25-apr-2012 (wed) |
|
|
15:45-16:45 |
HG G 43 |
|
|
| 2-may-2012 (wed) |
|
|
15:45-16:45 |
HG G 43 |
|
|
| 9-may-2012 (wed) |
|
|
15:45-16:45 |
HG G 43 |
|
|
| 16-may-2012 (wed) |
|
|
15:45-16:45 |
HG G 43 |
|
|
| 23-may-2012 (wed) |
|
|
15:45-16:45 |
HG G 43 |
|
|
| 30-may-2012 (wed) |
|
|
15:45-16:45 |
HG G 43 |
|
|
