Monday,
20141020
16:15

Raum 404, Eckerstr. 1
NN:
Programmdiskussion 
Monday,
20141027
16:15

Raum 404, Eckerstr. 1
Dr.Rodolfo RiosZertuche (MPI Bonn):
The variational structure of the set of holonomic measures
We study a set of measures that represent immersed submanifolds.Our main result is a set of stability conditions that include the EulerLagrange equations, but are
strictly more general. 
Monday,
20141103
16:1517:45

Raum 404, Eckerstr. 1
Felix Grimm:
Chiral de Rham Complex and Orbifolds 
Monday,
20141110
16:15

Raum 404, Eckerstr. 1
Dr. Mauricio Romo (IPMU Tokyo):
Gauged Linear Sigma Models, disk partition function and nonabelian matrix factorizations
I will explain how the supersymmetric disk partition function Z of gauged linear sigma models relates to the central charge of objects in the category of Bbranes of a CalabiYau (CY). The advantage of this approach is that Z provides an expression at every point in the quantum corrected moduli space of the CY. The Bbranes in these models are realized naturally as matrix factorizations, equivariant under the gauge group. I will explain how to relate them to more familiar objects such as coherent sheaves on the CY and show examples, if time alllows. 
Monday,
20141124
16:15

Raum 404, Eckerstr. 1
Florian Beck :
Integrable Systems via Lax equations
Many integrable systems can be formulated as a socalled Lax equation. In this talk, we will review the up to now wellknown construction which relates such integrable systems to algebraic geometry. If time permits, we also discuss some further directions due to Donagi, McDanielSmolinsky and others leading to decomposition of spectral covers and PrymTyurin varieties. 
Monday,
20141201
16:15

Raum 404, Eckerstr. 1
Ralf Braun:
KreckStolzInvarianten der GroveWilkingZillerFamilie N 
Monday,
20141208
16:15

Raum 404, Eckerstr. 1
Prof.Dr.Liviu Mare (University of Regina):
Quantum cohomology of affine flag manifolds and periodic Toda lattices
A theorem of Bumsig Kim (1999) says that the quantum cohomology ring of a full flag manifold (i.e. generic adjoint orbit of a compact Lie group) is determined by a certain integrable system, the open Toda lattice
, which is canonically associated to the Lie group.
In my talk I will present this result in some more detail and then I will explain how one can extend it to the context of affine KacMoody flag manifolds. The quantum cohomology ring is this time determined by
another integrable system, the periodic Toda lattice. This has been observed by Martin Guest and Takashi Otofuji (2001) for some particular flag manifolds.
Extensions of their result have been obtained recently by Leonardo Mihalcea and myself in a joint work.
They will be outlined in the talk. 
Monday,
20141215
16:15

Raum 404, Eckerstr. 1
Anja Wittmann:
Etaforms for fibrewise Dirac operators with kernel over a hypersurface 
Monday,
20150112
16:15

Raum 404, Eckerstr. 1
Anda Degeratu:
The Calabi conjecture for QAC geometries 
Monday,
20150119
16:15

Raum 404, Eckerstr. 1
Christian Ketterer:
Rigidity results for metric measure spaces 
Thursday,
20150129
14:15

Raum 404, Eckerstr. 1
Prof.Gabriela Ovando:
On first integrals of the geodesic flow on the Heisenberg Lie group
Abstract: In the first part we recall the definition of the symplectic structure on nilpotent Lie groups. We apply the information to the Heisenberg Lie group and its quotients. The goal is to find first integrals for the geodesic flow. 
Monday,
20150202
16:15

Raum 404, Eckerstr. 1
Alexander Alexandrov:
Open intersection numbers, matrix models and integrability
In my talk I will discuss a family of matrix models, which describes the generating functions of intersection numbers on moduli spaces both for open and closed Riemann surfaces. Linear (Virasoro\Wconstraints) and bilinear (KP\MKP integrable hierarchies) equations follow from the matrix model representation. 
Monday,
20150209
16:15

Raum 404, Eckerstr. 1
Peter Dalakov (Sofia):
DonagiMarkman cubics and Hitchin systems
As discovered by Donagi and Markman, the existence of Lagrangian structure on a holomorphic family of abelian varieties
(of appropriate dimension) depends on the vanishing of a certain local obstruction. In particular, the infinitesimal period map for the family
must be a section of the third symmetric power of the cotangent bundle to the base of the family. I will discuss recent work with U.Bruzzo
(IJM, vol.25 (2), 2014 ) where we compute the DonagiMarkman cubic for the generalised Hitchin system. In particular, we show that the
BalduzziPantev formula holds along the maximal rank symplectic leaves. 