[Vortraege] Vortragsankündigungen KW. 22

[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*

**

*Dienstag, 28. Mai 2013, von 14:00 Uhr bis 15:00 Uhr, Seminarraum C 209, 
UZA 4*

*Vortrag im Rahmen der Habilitation von Dr. Dörfler Monika *

*(Fakultät. für Mathematik , Universität Wien): **"**Local and Global 
Aspects of Time-Frequency Analysis -- With Application to Sound 
Analysis**"***

**

/_Abstract:_///

/In this talk I will introduce the basic ideas of time-frequency 
analysis both from a theoretical and applied point of view. The 
uncertainty principle prohibits the simultaneous resolution in time and 
frequency to arbitrary precision. This obstacle has led to numerous 
interesting developments in harmonic analysis over the past decades. I 
will describe the idea of quilted and non-stationary Gabor systems. For 
these systems, the strict regularity prescribed by the action of a 
related group (such as the Heisenberg group) is abandoned and replaced 
by more general construction principles. I will briefly address the 
question of the frame-property of these systems and suggest methods for 
perfect and approximate reconstruction from the (frame) coefficients 
obtained by means of the new systems. As an application, I present the 
construction of a perfectly invertible constant-Q transform, which 
solves a long-standing open problem in audio processing./

/Related to the investigation of time-frequency resolution are the 
so-called time-frequency localization operators, defined via the 
short-time Fourier transform. I will present some results on the 
characterization of function spaces by means of families of these 
operators. Since the latter operators are compact and self-adjoint, it 
is of interest to study them via their spectral decomposition; it will 
be shown how, in the special case of Hermite-functions, the localization 
domain is determined by a single eigenfunction. /

/Finally, if time permits, the talk will be concluded by an example of 
transform-domain modelling in the time-frequency domain based on the 
idea of structured sparsity and applied to the problem of audio inpainting./

**

*Univ.-Prof. Mag. Dr. Walter Schachermayer, Dekan Univ.-Prof. Dr. Harald 
Rindler*

**

*Mittwoch, 29. Mai 2013, von 11:00 Uhr bis 12:00 Uhr, Seminarraum D 107, 
UZA 4*

*Vortrag im Rahmen der Habilitation von Dr. Oleg Shcherbina*

*"Local Elimination Algorithms for Sparse Discrete Optimization Problems"***

**

/_Abstract:_///

/The thesis is dedicated to highly important issues of the research and 
development of decomposition methods for solving large-scale sparse 
problems of discrete optimization (DO) with a special block structure. 
To address these challenges, the author proposes to apply local 
elimination algorithms (LEA) for computing information that allows to 
obtain global information about the solution of the whole problem on the 
basis of computing local information./

/The objectives of the thesis are: the development of a general 
algorithmic scheme of local elimination algorithms for solving a wide 
class of sparse DO problems and discrete problems from other areas of 
applied mathematics, the investigation of extending the capabilities of 
local elimination algorithms for various classes of DO problems, the 
study of the complexityof LEA, and the analysis and selection of block 
DO problem classes effectively solved by LEA./

*//*

*Univ.-Prof. Dr. Arnold Neumaier, Dekan Univ.-Prof. Dr. Harald Rindler*

*//*

*Mittwoch, 29. Mai 2013, von 17:30 Uhr bis 18:30 Uhr, Seminarraum C 209, 
UZA 4*

*Vortrag im Rahmen der Habilitation von Dr. Beatrice Acciaio *

*(Fakultät für Mathematik, Universität Wien):*

*"Optimal Transport, Model-Independent Pricing and Trajectorial 
Inequalities "*

**

_Abstract: _

/We will illustrate the recently discovered connection between the 
problem of pricing financial derivatives in a model-free context and the 
Monge-Kantorovich optimal transport problem. Mathematically the crucial 
difference is that in the pricing problem the transport plans are 
required to be martingales. This link has already proved to be very 
fruitful. In particular, we will see how the //duality theorem from 
optimal transport leads to new robust super-replication results. //This 
dual viewpoint also provides new insights on classical martingale 
inequalities. For instance, we establish a (new) sharp version of the 
classical Doob maximal inequality./

**

*Univ.-Prof. Mag. Dr. Walter Schachermayer, Dekan Univ.-Prof. Dr. Harald 
Rindler*

**

*Mittwoch, 29. Mai 2013, von 15:00 Uhr bis 15:45 Uhr, Seminarraum C 209, 
UZA 4*

*Lectures for Everybody*

*Claus Rüffler: "Modeling the Evolution of Biological Diversity"*

*Organized by H. Hauser*

**

*Montag, 27. **Mai 2013, von 15:15 Uhr bis 17:00 Uhr, Seminarraum D 107, 
UZA 4*

*Arbeitsgemeinschaft Ergodentheorie*

*Andrei Khrennikov: "Ergodicity and measure-preserving for p-adic 
dynamical systems"*

*http://mat.univie.ac.at/~zweimueller/AG_ETHY.html* 
<http://mat.univie.ac.at/%7Ezweimueller/AG_ETHY.html>**

**

*Dienstag, 28. Mai 2013, von 11:15 Uhr bis 12:45 Uhr, Seminarraum S1, 
Althanstraße 12, 1090 Wien*

*Complex Analysis Seminar*

*Martin Kolar: "Levi degenerate hypersurfaces and Chern-Moser theory"*

*organized by: A.K. Herbig*

*http://www.univie.ac.at/complexanalysis/Activities/Seminar2013.html***

**

*Dienstag, 28. **Mai 2013, von 10:00 Uhr bis 11:00 Uhr, bis Freitag, 31. 
Mai 2013 von 10:00 Uhr bis 11:00 Uhr, Erwin Schrödinger Lecture Hall, 
Boltzmanng. 9, 1090 Wien*

*ESI Mini Lecture Course*

*Prof. Vladimir Korepin (C.N. Yang Institute for Theoretical Physics, 
State **University of New York, Stony Brook, U.S.A.): "The Algebraic 
Bethe Ansatz"*

*(Details siehe Attachment) *

*O**rganized by: **J. Schwermer***

**

*Dienstag, 28. Mai 2013, von 15:00 Uhr bis 17:00 Uhr, Seminarraum D 101, 
UZA 4*

*Geometry and Analysis on Groups -- Research Seminar*

*Jan Spakula: "Uniformly bounded representations of hyperbolic groups"*

*http://www.mat.univie.ac.at/~dosaj/GGTWien/Seminar.html* 
<http://www.mat.univie.ac.at/%7Edosaj/GGTWien/Seminar.html>**

**

*Dienstag, 28. Mai 2013, von 17:00 Uhr bis 18:30 Uhr, SeminarraumC 209, 
UZA 4*

*Vortrag im Rahmen des Seminars Wahrscheinlichkeitstheorie***

*Florian Stebegg: tba*

*Link: **http://www.mat.univie.ac.at/~finance_hp/seminarSS13_prob.html* 
<http://www.mat.univie.ac.at/%7Efinance_hp/seminarSS13_prob.html>**

**

*Dienstag, 28. Mai 2013, von 15:15 Uhr bis 16:45 Uhr, TU Institut für 
Diskrete Mathematik und Geometrie, Freihaus, grüner Turm (A), 8. Stock, 
Dissertantenr., Wiedner Hauptst. 8-10, 1040 Wien*

*Arbeitsgemeinschaft Diskrete Mathematik*

*Chirstoph Neumann: "A complexity theorem for the 
Novelli-Pak-Stoyanovskii algorithm"*

**

*Mittwoch, 29. Mai 2013, ab 11:15 Uhr, Seminarraum, Alserbachstr. **23, 
1090 Wien*

*NuHAG-Seminar*

*Andrei Khrennikov (Linnaeus University): "P-adic and adelic wavelets"*

*Link: 
**http://www.univie.ac.at/nuhag-php/home/seminar.php?abstract=Y&id=2514***

**

*Freitag, 31 Mai 2013, ab 14:00 Uhr, Erwin Schrödinger Lecture Hall, 
Boltzmanng. **9, 1090 Wien*

*ESI Seminar*

*Dr. Justin Sawon: "Deformations of generalized K3 surfaces and 
Fourier-Mukai transforms"*

*Organized by: **L. Katzarkov*




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