[Vortraege] Vortragsankündigungen und Begrüßung Gäste KW. 5

Fri Jan 23 17:48:22 CET 2015

Sehr geehrte Fakultätsmitglieder,

anbei die Vortragsankündigungen für die KW.5, im Anhang finden Sie den 
Text auch als PDF Datei.

Gerne begrüßen wir unsere Gäste, für die kommende Woche:

Horbez C. (Arzhantseva)
Pietra P. (Perugia)

Mit freundlichen Grüßen

-- 
Danijela Radosavljevic
Sekretariat
Institut für Mathematik
Universität Wien
Oskar-Morgenstern-Platz 1
1090 Wien
Zi. 10.140
Tel: 43 1 4277 50629

**

*Vorträge*

**

**

**

*Mittwoch, 28. Jänner 2015, ab 16:15 Uhr, Sky-Lounge (12 OG), *

*Oskar-Morgenstern-Platz 1, 1090 Wien*

*Mathematisches Kolloquium*

*Prof. Dr. Adrian I. Nachman (University of Toronto): *

*“**Reconstruction Method for the Calderon Problem with Partial Data”*

**

/Abstract: The classical inverse boundary value problem of Calderon 
consists in determining the conductivity inside
  a body from the corresponding Dirichlet-to-Neumann map. 
Bukhgeim-Uhlmann and Kenig-Sjstrand-Uhlmann have
  shown that (in dimensions three and higher) uniqueness in the above 
problem holds even if measurements are
available on possibly very small subsets of the boundary./

//

/I will explain a constructive proof of these partial data results, 
obtained in joint work with Brian Street.
Our proof involves a family of new Green's functions for the Laplacian, 
which may be of independent interest./

*//*

*15:45 Uhr – 16:15 Uhr K & K (Sky Lounge)*

**

*Univ.-Prof. Dipl.-Ing. Dr. Otmar Scherzer*

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

**

**

*Donnerstag, 29. Jänner 2015, von 12:00 Uhr bis 13:00 Uhr, HS 2,EG. *

*Oskar-Morgenstern-Platz 1, 1090 Wien *

*Habilitationsvortrag *

*Dr. Matthias Hammerl (Fakultät für Mathematik, Universität Wien): *

*„Holonomy Reductions of Parabolic Geometries and Curved Orbit 
Decompositions“*

**

/Abstract:/

/An approach via holonomy groups is often a fruitful way to understand 
geometric structures, and there has thus been
  a long established theoretical pursuit to explore the geometric 
implications of reduced holonomy and to understand the
  possible holonomy groups for a given//geometric structure. While in 
particular the holonomy groups of affine
connections and (pseudo) Riemannian metrics have been intensively 
studied, the appropriate notion of an holonomy
reduction for general Cartan geometries has long remained elusive. For 
in this case,//which includes the class of parabolic
geometries and in particular projective and conformal structures, it is 
no longer geometrically evident how to interpret an
  holonomy group in terms of underlying geometric data. In this talk I 
am going to discuss a general holonomy reduction
method for Cartan geometries developed in joint work with A. Cap (Univ. 
of Vienna) and A. R. Gover (Univ. of Auckland).
The main result is the curved orbit decomposition theorem: It is shown 
that an holonomy reduction of a Cartan geometry
gives rise to a natural decomposition of the underlying manifold into 
initial submanifolds, each of which carries an induced
geometric structure and corresponds to a group-orbit on an homogeneous 
model. In particular, this provides an
  algebraic/geometric explanation of the singularity sets that are 
typically observed for parabolic holonomy reductions.
The results are applied to study solutions of geometric overdetermined 
PDEs on parabolic geometries./

**

*Univ.-Prof. Mag. Dr. Andreas Cap*

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

****

*
*

*Montag, 26. Jänner 2015, ab 18:00 Uhr, Fakultät für Physik, 
Lise-Meitner-Hörsaal, 1. Stock, Boltzmanngasse 5/Strudlhofgasse 4*

*Abschiedsvorlesungvon em. o. Univ.-Prof. Dr. Jakob Yngvason: *

*„Kalte Atome und Quantenwirbel“*

*(Details siehe Attachment) *

**

*Dienstag, 27. Jänner 2015, von 10:15 Uhr bis 11:45 Uhr, Seminarraum 12, 
2. **Stock *

*Oskar-Morgenstern-Platz 1, 1090 Wien*

*Complex Analysis Seminar*

*Ilya Kossovskiy: “On the analtyticity of CR-maps”*

*http://www.univie.ac.at/complexanalysis/Activities/Seminar2015.html***

**

*Dienstag, 27. Jänner 2015, von 15:00 Uhr bis 17:00 Uhr, Seminarraum 8, 
2. **Stock *

*Oskar-Morgenstern-Platz 1, 1090 Wien*

*Geometry and Analysis on Groups *

*Camille Horbez****(Université Rennes 1): “The Tits alternative for the 
automorphism group of a free product”***

*http://www.mat.univie.ac.at/~gagt/abstracts/150127.html* 
<http://www.mat.univie.ac.at/%7Egagt/abstracts/150127.html>**

*Organized by G. Arzhantseva, Ch. Cashen *

**

*Dienstag, 27. Jänner 2015**, von 15:15 bis 16:45 Uhr, TU 
Dissertantenraum, Freihaus, Turm A, 8. **Stock, Wiedner Hauptstraße 
8-10, 1040 Wien*

*AG Diskrete Mathematik Seminar*

*Christian Krattenthaler (Univ Wien): “Two applications of growth 
diagram bijections”*

*http://dmg.tuwien.ac.at/nfn/agdm.html*

**

*Dienstag, 27. Jänner 2015,ab 15:00 Uhr, Seminarraum Biomathematik, 9 Stock
Oskar-Morgenstern-Platz 1, 1090 Wien*

*Arbeitsgemeinschaft Biomathematik *

*Michaela Freitag: “An introduction to the Allee effect”*

**

*Dienstag, 27 Jänner 2015 ab 9:00 Uhr bis Freitag, 30. Jänner 2015, ab 
9:00 Uhr, Erwin Schrödinger Lecture Hall, Boltzmanngasse 9, 1090 Wien*

*Infinite-dimensional Riemannian geometry with applications to image 
matching and shape analysis**“*

*/(7. Jänner – 27. Februar 2015)/*

*Week 3 “Currents, surfaces and manifolds of Mappings”*

*organized by*

*M. Bauer (Univ. **Wien), M. Bruveris (Brunel), P. W. Michor (Univ.Wien)*

*(Details siehe Attachment)*

**

*Mittwoch, 28. Jänner 2015, von 14:00 Uhr bis 15:00 Uhr, TU Wien,***

*Freihaus, grüner Turm, 4. Stock, SEM 101C, Wiedner Hauptstraße 8-10, 
1040 Wien, ***

*DK****Seminar*****

*Jan Maas (IST Austria):**“Approximating rough stochastic PDEs”***

*http://npde.tuwien.ac.at/teaching/StatSemAbstracts_WS14/Maas.pdf***

**

*Mittwoch, 28.Jänner 2015,ab 12:15 Uhr, Seminarraum 9, 2. Stock
Oskar-Morgenstern-Platz 1, 1090 Wien*

*NuHag Seminar*

*Sarah Koppensteiner: “Lattices, Theta functions, and Fourier series”*

**

*Donnerstag, 29. Jänner 2015, von 16:00 Uhr bis 18:00 Uhr, Josephinum, *

*SR (Zi. O2.101), Währingerstr. 25, 1090 Wien*

*KGRC Research Seminar**
Seçil Tokgöz (Hacettepe Üniversitesi, Ankara): “Paracompactness and 
Remainders”*

*http://www.logic.univie.ac.at/Current_talk.html***

**

*Donnerstag, 29. Jänner 2015,von 12:15 Uhr bis 13:15 Uhr, Seminarraum 9, 
2 Stock
Oskar-Morgenstern-Platz 1, 1090 Wien*

*Vortrag im Rahmen des Seminars Optimierung
Hermann Schichl: „An SQP-inspired method for nonsmooth nonconvex 
optimization problems“*

*Organized by R. Bot, A. Neumaier, H. Schichl *

**

*Donnerstag, 29. Jänner 2015, ab 14:00 Uhr, Seminarraum 7, 2 Stock
Oskar-Morgenstern-Platz 1, 1090 Wien*

*Mathematical Physics Seminar*

*Markus Holzleitner:*“*Dispersive estimates for one-dimensional 
Schrödinger and Jacobi operators in the resonant case”*

*Organized by G. Teschl *

*http://www.mat.univie.ac.at/~gerald/mp-sem/* 
<http://www.mat.univie.ac.at/%7Egerald/mp-sem/>**

**

**

**

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