Tuesday,
20140408
14:1515:15

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. 
Monday,
20140428
16:15

Raum 404, Eckerstr. 1
NN:
Programmdiskussion 
Monday,
20140512
16:15

Raum 404, Eckerstr. 1
Christoph Bier:
StringTopology 
Monday,
20140519
16:15

Raum 404, Eckerstr. 1
Johannes Frank:
Der Satz von PoincareHopf für Laminationen 
Monday,
20140526
16:1517:45

Raum 404, Eckerstr. 1
YiSheng Wang:
Smoothing theory on homology spheres and its application on Algebraic Ktheory

Monday,
20140602
16:15

Raum 404, Eckerstr. 1
Federica Pasquotto:
Periodic orbits in cotangent bundles of noncompact 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 noncompact.
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. 
Thursday,
20140605
12:0013:15

Raum 404, Eckerstr. 1
Roberto Volpato (MPI Golm):
Symmetries of N=4 nonlinear sigma models 
Monday,
20140623
16:15

Raum 404, Eckerstr. 1
Julian Fecker:
MaaßFormen
(Der Vortrag wird auf Deutsch gehalten) 
Monday,
20140630
16:15

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. 
Monday,
20140707
16:15

Raum 404, Eckerstr. 1
Blaz Mramor:
AubryMather theory on manifolds 
Monday,
20140714
16:15

Raum 404, Eckerstr. 1
Natalie Peternell:
The real and the holomorphic ChernSimons functional 
Monday,
20140721
16:15

Raum 404, Eckerstr. 1
Katharina Fischer:
The Mathieu group $M_{24}$
Presentation of Master Thesis 
Thursday,
20140724
12:0001:15

Raum 404, Eckerstr. 1
Eric Sharpe (Virginia Tech):
Sheaftheoretic analogues of MathaiQuillen forms
In this talk we review certain generalizations of MathaiQuillen forms.
Ordinary MathaiQuillen forms are representations of Thom classes, and
play an important role in topological field theories. We shall
discuss analogues appearing in more recent pseudotopological
field theories, involving representations of certain sheaf cohomology
classes which reduce to ordinary MathaiQuillen forms in special cases.
We discuss some basic properties and make a few conjectures. 
Monday,
20140728
16:15

Raum 404, Eckerstr. 1
Felix Grimm:
TBA 
Monday,
20140825
16:1517:15

Raum 404, Eckerstr. 1
Twareque Ali (Concordia University, Montreal):
Some Interesting Aspects of a Simple Model of "Noncommutative Quantum Mechanics"
Recently there has been much interest in studying a twodimensional model of quantum mechanics, where the two components of position, and possibly also momentum, are made noncommutative. The understanding here is that such a model might mimic a nonstandard 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. 