# Veranstaltungsübersicht -- Sommersemester 2014 (Archiv)

 Dienstag, 2014-04-08 14:15-15:15 Uhr Raum 404, Eckerstr. 1 Prof. Scott Carnahan: Recent progress in generalized moonshine Monstrous moonshine started in the 1970s, when McKay and some others found apparent numerical coincidences relating modular functions on the complex upper half plane and linear representations of the monster simple group. We now know that the numerical relationships that were initially seen can be explained by the existence of the monster vertex algebra. Later computations by Queen and Norton suggested that certain subgroups of the monster also yielded modular functions from their representation theory, and this was codified by Norton in his generalized moonshine conjecture. I will describe this conjecture, a mathematical interpretation arising from orbifold conformal field theory, and some recent progress. Montag, 2014-04-28 16:15 Uhr Raum 404, Eckerstr. 1 NN: Programmdiskussion Montag, 2014-05-12 16:15 Uhr Raum 404, Eckerstr. 1 Christoph Bier: String-Topology Montag, 2014-05-19 16:15 Uhr Raum 404, Eckerstr. 1 Johannes Frank: Der Satz von Poincare-Hopf für Laminationen Montag, 2014-05-26 16:15-17:45 Uhr Raum 404, Eckerstr. 1 Yi-Sheng Wang: Smoothing theory on homology spheres and its application on Algebraic K-theory Montag, 2014-06-02 16:15 Uhr Raum 404, Eckerstr. 1 Federica Pasquotto: Periodic orbits in cotangent bundles of non-compact manifolds In this talk I will discuss some existence results for periodic orbits on fixed energy levels of mechanical Hamiltonian systems. In particular, these energy hypersurfaces are allowed to be non-compact. I will focus on the analytical and geometrical problems posed by the lack of compactness and discuss advantages and limitations of our method of proof ("linking"). This is joint work with T. Rot, J.B. van den Berg and R. Vandervorst. Donnerstag, 2014-06-05 12:00-13:15 Uhr Raum 404, Eckerstr. 1 Roberto Volpato (MPI Golm): Symmetries of N=4 non-linear sigma models Montag, 2014-06-23 16:15 Uhr Raum 404, Eckerstr. 1 Julian Fecker: Maaß-Formen (Der Vortrag wird auf Deutsch gehalten) Montag, 2014-06-30 16:15 Uhr Raum 404, Eckerstr. 1 Doris Hein: Applications of Morse theory to cuplength estimates in symplectic geometry There are many estimates in symplectic geometry which provide a lower bound for the number of, e.g., periodic orbits of Hamiltonian systems or Hamiltonian chords of Lagrangian submanifolds. In this talk, I will describe various Floer theories related to these estimates and sketch a Morse theoretic argument which can be applied to the Floer settings to give a unifoed proof of these estimates. Moreover, this argument is also applicable in other cases, where the corresponding cuplength estimates was not known before. Montag, 2014-07-07 16:15 Uhr Raum 404, Eckerstr. 1 Blaz Mramor: Aubry-Mather theory on manifolds Montag, 2014-07-14 16:15 Uhr Raum 404, Eckerstr. 1 Natalie Peternell: The real and the holomorphic Chern-Simons functional Montag, 2014-07-21 16:15 Uhr Raum 404, Eckerstr. 1 Katharina Fischer: The Mathieu group $M_{24}$ Presentation of Master Thesis Donnerstag, 2014-07-24 12:00-01:15 Uhr Raum 404, Eckerstr. 1 Eric Sharpe (Virginia Tech): Sheaf-theoretic analogues of Mathai-Quillen forms In this talk we review certain generalizations of Mathai-Quillen forms. Ordinary Mathai-Quillen forms are representations of Thom classes, and play an important role in topological field theories. We shall discuss analogues appearing in more recent pseudo-topological field theories, involving representations of certain sheaf cohomology classes which reduce to ordinary Mathai-Quillen forms in special cases. We discuss some basic properties and make a few conjectures. Montag, 2014-07-28 16:15 Uhr Raum 404, Eckerstr. 1 Felix Grimm: TBA Montag, 2014-08-25 16:15-17:15 Uhr Raum 404, Eckerstr. 1 Twareque Ali (Concordia University, Montreal): Some Interesting Aspects of a Simple Model of "Non-commutative Quantum Mechanics" Recently there has been much interest in studying a two-dimensional model of quantum mechanics, where the two components of position, and possibly also momentum, are made non-commutative. The understanding here is that such a model might mimic a non-standard structure of space at very short distances. In this talk we discuss some group theoretical aspects of such a model and some generalized complex Hermite polynomials associated with it.

## Abonnieren

Die Einträge dieser Veranstaltung können im iCalender Format abonniert werden. die URL dazu lautet:
http://wochenprogramm.mathematik.uni-freiburg.de/ical/SS2014/OS-DiffGeo.ics