[Vortraege] Vortragsankündigungen KW. 26

[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, 26. Juni 2013, ab 16:15 Uhr, Olga Taussky-Todd Raum (C 209), 
UZA 4*

*Mathematisches Kolloquium *

*Prof. Dr . Bernd Sturmfels (Univ. of California Berkeley): 
"Non-negative Polynomials versus Sums of squares"*

/_Abstract:_///

We discuss the geometry underlying the difference between non-negative 
polynomials and sums of squares.
The hypersurfaces that discriminate these two cones for ternary sextics 
and quaternary quartics are shown to be
Noether-Lefschetz loci of K3 surfaces. The projective duals of these 
hypersurfaces are defined by rank constraints on Hankel matrices.
We compute their degrees using numerical algebraic geometry, thereby 
verifying results due to Maulik and Pandharipande.
The non-SOS extreme rays of the two cones of non-negative forms are 
parametrized respectively by the Severi variety of
plane rational sextics and by quartic symmetroids. This lecture is based 
on work of Greg Blekherman, and a joint paper with J
onathan Hauenstein, John Christian Ottem and Kristian Ranestad.

*15:45 Uhr -- 16:15 Uhr K & K (Common Room)*

*V.-Prof. Mag. Dr. Herwig Hauser, Dekan Univ.-Prof. Dr. Harald Rindler*

*Montag, 24. Juni 2013, von 15:15 Uhr bis 17:00 Uhr, Seminarraum D 107, 
UZA 4*

*Arbeitsgemeinschaft Ergodentheorie*

*Roland Zweimüller: The general asympotic return-time process"*

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

*Montag, 24. Juni 2013, ab 9:30 Uhr bis Freitag, 28. Juni 2013, ab 10:00 
Uhr, Erwin Schrödinger Lecture Hall, Boltzmanng. **9, 1090 Wien*

*The Geometry of Topological D-branes, Categories and Applications:*

*Workshop on "Higher Categories and Topological Quantum Field Theories"*

*Organized by: S. Gukov, A. Kapustin, L. Katzarkov and Y. Soibelman*

*Dienstag, 25. Juni 2013, von 11:15 Uhr bis 12:45 Uhr, Seminarraum S1, 
Althanstraße 12, 1090 Wien*

*Complex Analysis Seminar*

*Tobias Preinerstorfer: "A sufficient condition for A² (C,**?**) 
infinite dimension"*

*organized by: A.K. Herbig*

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

**

*Dienstag, 25. Juni 2013, von 17:00 Uhr bis 18:30 Uhr, SeminarraumC 209, 
UZA 4*

*Vortrag im Rahmen des Seminars Wahrscheinlichkeitstheorie***

*Andrej Depperschmidt (Freiburg,): "Tree-valued Fleming-Viot processes 
with mutation and selection"*

*Link:**http://www.mat.univie.ac.at/~finance_hp/seminarSS13.html* 
<http://www.mat.univie.ac.at/%7Efinance_hp/seminarSS13.html>**

*
*

*Dienstag, 25. Juni 2013, ab 14:00 Uhr, TU Institut für Diskrete 
Mathematik und Geometrie, Freihaus, grüner Turm (A),
5. Stock, kleiner Seminarraum (DA 05 C22), Wiedner Hauptstraße 8-10, 
1040 Wien*

*Algebra Seminar*

*Karl Lorensen (Penn State Altoona): "Near supplements and complements 
in solvable minimax groups"*

*Link: **http://www.dmg.tuwien.ac.at/fg1/seminar.html***

*
*

*Dienstag, 25. Juni 2013, ab 15:00 Uhr, Seminarraum D 103, UZA 4*

*Arbeitsgemeinschaft Biomathematik*

*Andrej Depperschmidt (Freiburg, DE.): "**Tree-valued Fleming-Viot 
processes with mutation and selection"*

*
*

*Mittwoch, 26. Juni 2013, ab 17:30 Uhr, Seminarraum C 209, UZA 4*

*Öffentliche Defensio*

*Mag. Tanveer Iqbal:" Worst case error bounds for the solution of uncertain*

*partial di_erential equations"*

*
*

*Donnerstag, 27. **Juni**2013, von 16:00 Uhr bis 18:00 Uhr, Josephinum, *

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

*KGRC Research Seminar*

*Thomas Johnstone: "Indestructibility Results for Ramsey Cardinals"*

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

*
*

*Donnerstag, 27. Juni 2013, von 17:00 Uhr bis 18:30 Uhr, Seminarraum C 
209, UZA 4*

*Vortrag im Rahmen des Seminars Finanzmathematik *

*Eberhard Mayerhofer: tba*

*Link: **http://www.mat.univie.ac.at/~finance_hp/seminarSS13.html* 
<http://www.mat.univie.ac.at/%7Efinance_hp/seminarSS13.html>**

**

*Freitag, 28. Juni, von 11:15 Uhr bis 12:00 Uhr, Seminarraum D 101, UZA 4*

*Vortrag*

*Philipp Harms: "Two-Armed Restless Bandits with Imperfect Information: 
Stochastic Control and Indexability"*

**

*Freitag, 28. Juni 2013, ab 12:30 Uhr, WPI Seminarraum C 714, UZA 4*

*WPI Vortrag*

*Prof. Sivaguru Sritharan (Director of DRCSI): "An Invitation to the 
Millennium Prize Problem for the Navier-Stokes Equation and its 
Probabilistic Counter Part"*

*Organized by: WPI*

**

*Freitag, 28. **Juni**2013, von 14:00 Uhr bis 15:30 Uhr, Josephinum, *

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

*KGRC Research Seminar*

*Santi Spadaro (Silesian, Univ. of Opava): "Chain conditions for 
topological bases"*

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

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