Oberseminar Geometrie, Topologie und Analysis

H. Geiges, M. Lesch, G. Thorbergsson

Wintersemester 2003/04

Freitag, 10:30-12:00, Seminarraum 1

24.10.03 Prof. András Stipsicz (A. Rényi Institute, Budapest)
Contact surgery and Heegaard-Floer theory

Abstract: Contact surgery provides an effective way to produce contact 3-manifolds. According to a result of Ding and Geiges, any closed contact 3-manifold can be given as contact (+1)- or (-1)-surgery along a Legendrian link in the standard 3-sphere. Using Heegaard Floer theory we show instances when such structures can be distinguished (up to contact isotopy), and when tightness of such structures can be verified with the use of the recently defined Ozsváth-Szabó contact invariants. The talk intends to give an introduction to the topics listed above, with some interesting applications.
7.11.03 Prof. Charles Thomas (Cambridge, z.Zt. MPI Bonn)
3-manifolds with finite fundamental group

14.11.03 Dr. Alexander Lytchak (Bonn)

21.11.03 Prof. Iskander Taimanov (Sobolev-Institut, Novosibirsk; z.Zt. MPI Bonn)
Magnetic geodesic flows

5.12.03 Prof. Peter Heinzner (Bochum)
Die Cartan-Zerlegung der Momentum-Abbildung

12.12.03 Dr. Frank Neumann (Leicester)
Kohomologie verallgemeinerter homogener Räume

9.1.04 PD Dr. Wilderich Tuschmann (Münster)
Geometrie und Topologie positiver Ricci-Krümmung

16.1.04 Prof. Gestur Olafsson (Louisiana State U, Baton Rouge)
Harmonic analysis on symmetric spaces and the Gelfand Gindikin program

23.1.04 Prof. Dmitrij Akhiezer (Moskau)
Spherical varieties

30.1.04 Prof. Takaaki Nomura (Kyoto)
Some symmetry conditions of homogeneous Siegel domains

6.2.04 Prof. Bernhelm Booß-Bavnbek (Roskilde)
The general spectral flow formula

Prof. Bernhelm Booß-Bavnbek (Roskilde)
Schwach symplektische Funktionalanalysis

H. Geiges, 23.9.03