[Vortraege] Vortragsankündigungen KW. 2

[Danijela Radosavljevic]

Sehr geehrte Fakultätsmitglieder,

anbei die Vortragsankündigungen für die kommende Woche, im Anhang finden 
Sie den Text auch als PDF Datei.

Mit freundlichen Grüßen

Danijela Radosavljevic

Sekretariat
Institut für Mathematik
Universität Wien
Nordbergstr. 15, UZA 4
Tel: 43 1 4277 50629
Fax: 43 1 4277 9506

Vorträge

*Mittwoch, 11. Jänner 2012, ab 15:00 Uhr, Olga Taussky-Todd Raum (C 
209), UZA 4*

*Mathematisches Kolloquium*

**

*15:00 Uhr Ass. Prof. Dr. I. Fischer*

*"Combinatorics of Fully Packed Loop configurations in a triangle"*

**

*15:30 Uhr K & K (Common Room)*

**

*16:00 Uhr Ass. Prof. Dr. D. Burde *

*"Post --Lie Algebra Structures and Nil-affine Actions of Lie Groups"*

**

*16:30 Uhr Ass. Prof. Dr. B. Lamel*

*"Maps of real-analytic CR manifolds"*

*_
_*

*Abstract*

*_
_*

*Ilse Fischer:*

*Fully Packed Loop configurations are certain subgraphs of a square grid 
such that each internal node is of degree two. While these objects arise 
naturally in astatistical physics context, they lead to intriguing 
enumerative problems. Fully Packed Loop configurations of triangular 
shape turn out to be of *

*particular interest as, for instance, their enumeration in a special 
case is given by Littlewood-Richardson coefficients. This establishes an 
unexpected link to algebra. I will sketch a new combinatorial approach 
to the enumeration of these objects. This is joint work with Philippe 
Nadeau (CNRS, Université Lyon 1).*

*_
_*

*Dietrich Burde:*

*Post-Lie algebras have been invented by Vallette and Loday in 2007 in 
the context of operad theory, which may be described shortly by "algebra 
meets homotopy".*

*They also appear in the work of Connes and Kreimer in the context of 
renormalization theory in quantum field theory. We describe a third 
topic, which leads again to Post-Lie algebras. They emerge in the study 
of simply transitively actions by of one Lie group G on another Lie 
group N, acting by so called nil-affine*

*transformations. We present several structural results on such actions 
and on the existence of post-Lie algebra structures (joint work with 
Karel Dekimpe, KU Leuven).*

*_
_*

*Bernhard Lamel:*

*Starting with an observation of Poincaré, we describe an approach to 
reconstructing maps between CR manifolds from their defining equation 
and finite-dimensional additional data. This will lead us to a theorem 
(joint work with R. Juhlin and G. Della Sala) which implies that the 
locus of points in a holomorphically nondegenerate, minimal 
real-analytic CR manifold where the germs are biholomorphically 
equivalent to the germ at a given point is a locally closed, 
real-analytic submanifold. We also give an outlook on a solution to the 
biholomorphic equivalence problem for minimal, holomorphically non 
degenerate CR manifolds based on thetechniques developed in that paper.*

**

*Dekan Univ.-Prof. Dr. Harald Rindler***

*Montag, 9. Jänner 2012 bis Dienstag, 28.**Februar 2012, Erwin 
Schrödinger Lecture Hall, Boltzmanngasse 9, 1090 Wien*

*ESI Workshop *

*Automorphic Forms: Arithmetic and Geometry*

*J.W. Cogdell, C. Moeglin, G. Muic, J. Schwermer*

*(Details siehe Attachment)*


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