[Vortraege] Vortragsankündigungen KW 18

[Martina Fellner]

Sehr geehrte Fakultätsmitglieder,

anbei die Vortragsankündigungen für die KW.18, im Anhang finden Sie den 
Text auch als PDF Datei.

Gerne begrüßen wir unsere Gäste, für die kommende Woche:

N. Wright (Arzhantseva)
Ch. Profeta (Beiglböck)
F. J. Silva (Beiglböck)
V. Kaimanovic (Bruin)
D. Mitrovic (Kunzinger)
J. F. Olsen (Lamel)


*Vorträge*

**

*Mittwoch, 29. April2015, ab 16:15 Uhr, Sky-Lounge (12 OG), *

*Oskar-Morgenstern-Platz 1, 1090 Wien*

*Mathematisches Kolloquium*

*Prof. Dr. Gitta Kutyniok (Technische Universität Berlin)*

**

/Abstract: //Modern imaging data are often composed of several 
geometrically distinctcons tituents. For instance, neurobiological 
images could consist of a superposition ofspines (pointlike objects) and 
dendrites (curvelike objects) of a neuron. A neurobiologist might then 
seek to extract both components to analyze their structure separately 
for the study of Alzheimer specific characteristics. However, this task 
seems impossible, since there are two unknowns for every 
datum.Compressed sensing is a novel research area, which was introduced 
in 2006, and since then has already become a key concept in various 
areas of applied mathematics,computer science, and electrical 
engineering. It surprisingly predicts that highdimensionalsignals, which 
allow a sparse representation by a suitable basis or, more/

/generally, a frame, can be recovered from what was previously 
considered highly incomplete linear measurements, by using efficient 
algorithms.Utilizing the methodology of Compressed Sensing, the 
geometric separation problem can indeed be solved both numerically and 
theoretically. For the separation of pointand curvelike objects, we 
choose a deliberately overcomplete representation system/

/made of wavelets (suited to pointlike structures) and shearlets (suited 
to curvelike structures). The decomposition principle is to minimize the 
$\ell_1$ norm of the representation coefficients. Our theoretical 
results, which are based on microlocal analysis considerations, show 
that at all sufficiently fine scales, nearly-perfectseparation is indeed 
achieved.This project was done in collaboration with David Donoho 
(Stanford University) and //Wang-Q Lim (TU Berlin)./*//*

*//*

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

**

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

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

**

*Mittwoch, 29. April 2015, von 15:00 Uhr bis 16:00 Uhr, HS 13, 2. Stock, 
**Oskar-Morgenstern-Platz 1, 1090 Wien//*

*Habilitationsvortrag *

*Dr. Calin Iulian Martin (Fakultät für Mathematik, Universität Wien): *

*„**Nonlinear capillary-gravity and gravity water waves with vorticity**“***

**

/Abstract: //We present recent results concerning water waves over 
rotational flowsdriven by gravity and surface tension. We consider the 
case of waterflows without stagnation points, as well as the situation 
where stagnation points are present in the flow./*//*

**

*Univ. Prof. Adrian Constantin*

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

**

*!!!!!! Montag, 27. April 2015, !!!! **um 16:45 Uhr, SR 10, 2. OG., 
Oskar-Morgenstern-Platz 1, 1090 Wien*

*Arbeitsgemeinschaft Ergodentherapie *

*Vadim Kaimanovich: „Boundary actions of random subgroups”*

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

**

*Dienstag, 28. April 2015, ab 15:00 Uhr, Seminarraum Biomathematik, 9 Stock
Oskar-Morgenstern-Platz 1, 1090 Wien*

*Arbeitsgemeinschaft Biomathematik *

*Stefan Müller (Radon Inst., Linz): “Recombination as a chemical 
reaction network”*

*
*

**

*Dienstag, 28. April 2015**, von 15:15 bis 16:45 Uhr, TU 
Dissertantenraum, Freihaus, Turm A, 8. **Stock, Wiedner Hauptstraße 
8-10, 1040 Wien*

*AG Diskrete Mathematik *

*Henri Muehle: **“**Generated Groups, Shellability, and Transitivity of 
the Hurwitz Action" *

*_http://dmg.tuwien.ac.at/nfn/agdm.html_*

**

*Dienstag, 28. April 2015, von 15:00 Uhr bis 17:00 Uhr, Seminarraum 8, 
2. **Stock, **Oskar-Morgenstern-Platz 1, 1090 Wien//*

*Geometry and Analysis on Groups *

*Nick Wright (Univ. of Southampton): “Geometric Examples of the 
Baum-Connes conjecture and Langlands duality.”*

*Organized by G. Arzhantseva, Ch. **Cashen *

*_http://www.mat.univie.ac.at/~gagt/abstracts/150428.html_*

**

*Dienstag, 28. April 2015, von 9:45 Uhr bis 11:15 Uhr, **Seminarraum 12, 
2 Stock, *

*Oskar-Morgenstern-Platz 1, 1090 Wien*

*Complex Analysis Seminar*

*Jan-Fredrik Olsen**: “**On a sharp estimate for Hankel operators and 
Putnam's inequality* 
<http://www.univie.ac.at/complexanalysis/Activities/Seminar2015.html#abs278>*”*

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

**

*Mittwoch, 29. April 2015, um 15:00 Uhr, Besprechungszimmer 9. Stock, 
Oskar-Morgenstern-Platz 1, 1090 Wien*

*Öffentliches Defensio*

*Dipl. Ing. Christoph Winkler:”A Close Look at Actin Driven Movement: 
 From Inage Analysis to Simulation **“***

**

*Donnerstag, 30. April **2015, ab 11:00 Uhr,**Wahringerstrasse 17, 4 st, 
Zi 405****, 1090 Wien*

*Geometric Analysis and Physics (GAP)*

*Walter Simon: “Initial data for rotating cosmological solutions of 
Einstein equations”*

*Organized by M.Bauer (UV), V. Branding (TU), D. Fajman (UV), J. 
Joudioux (UV)*

*(Details siehe Attachment)*

**

*Donnerstag, 30.April 2015, ab 13:30 Uhr, Seminarraum 7, 2 Stock
Oskar-Morgenstern-Platz 1, 1090 Wien*

*Mathematical Physics Seminar*

*Aleksey Kostenko (Uni. Wien): “Spectral Theory of Wannier-Stark Operators”*

*Organized by G. Teschl*

**

*Donnerstag, 30. **April 2015, von 16:00 Uhr bis 18:00 Uhr, Josephinum, *

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

*KGRC Research Seminar*

*Lyubomyr Zdomskyy (KGRC): “**Remainders of topological groups and 
Grigorieff forcing* 
<http://www.logic.univie.ac.at/2015/Talk_04-30_a.html>*”*

*http://www.logic.univie.ac.at/2015/Talk_04-30_a.html*

*Donnerstag, 30. April **2015, von 16:30 Uhr bis 18:00 Uhr, **TU 
Seminarraum 101C, Freihaus, Grüner Bereich, 4. **Stock, Wiedner 
Hauptstraße 8, 1040 Wien*

*Vienna Seminar in Mathematical Finance and Probability*

*Christophe Profeta* 
<http://www.maths.univ-evry.fr/pages_perso/cprofeta/>*(Université d'Evry 
Val d'Essonne, FR):”*Peacocks and Associated Martingales“**

*_http://www.fam.tuwien.ac.at/events/vs-mfp/_*




-- 
Martina Fellner
Sekretariat Fakultät für Mathematik
10. Stock, Zimmer 10.140
Oskar-Morgenstern-Platz 1
1090 Wien
Tel.: 43 (1) 427750602

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