BEGIN:VCALENDAR
METHOD:PUBLISH
PRODID:Data::ICal 0.16
VERSION:2.0
BEGIN:VEVENT
CLASS:PUBLIC
DESCRIPTION:Vortrag in der Reihe: Oberseminar NUMERIK UND WISSENSCHAFTLICHE
 S RECHNEN\nMultivariate integration is one of the prime examples for compl
 exity\nstudies of high dimensional problems. In this talk we review more o
 r\nless well-known results for deterministic and randomized algorithms\,\n
 present some new approaches and look at related open problems.\nWe discuss
  in some detail positive results on the power of random-\nized algorithms\
 , in particular importance sampling. An abstract but\nnonconstructive appr
 oach gives a rather general tractability theorem\nfor integration of funct
 ions from reproducing kernel Hilbert spaces. We\nexhibit cases for which t
 he sampling density for the algorithm can be\ngiven explicitly based on ce
 rtain Sobolev type inequalities.\nWe also discuss negative results in the 
 deterministic setting such\nas the curse of dimensionality even for some s
 mall classes of smooth\nfunctions.
DTEND;TZID=Europe/Berlin:20130521T173000
DTSTAMP;TZID=Europe/Berlin:20130520T022000
DTSTART;TZID=Europe/Berlin:20130521T160000
LOCATION:MPI für Mathematik in den Naturwissenschaften Leipzig\, Inselstr.
  22\, Leibniz-Hörsaal (G 10)
ORGANIZER;CN=Valeria Hünniger:mailto:Valeria.Huenniger@mis.mpg.de
PRIORITY:5
SUMMARY:Aicke Hinrichs (Mathematisches Institut\, Universität Rostock): Tr
 actability of multivariate integration - old and new results and open prob
 lems
UID:www.mis.mpg.de_13617
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
DESCRIPTION:Vortrag in der Reihe: Oberseminar NUMERIK UND WISSENSCHAFTLICHE
 S RECHNEN\nOne of the main themes of inverse scattering theory for time-ha
 rmonic acoustic or electromagnetic waves is to determine information on un
 known objects from measurements of scattered waves away from these objects
 . These inverse problems are non-linear and severely ill-posed.\n\nBesides
  standard regularization methods\, which are typically iterative\, a compl
 etely different methodology - so-called qualitative reconstruction methods
  - has attracted a lot of interest recently. These algorithms recover spec
 ific qualitative properties of scattering objects in a reliable and fast w
 ay. They avoid the simulation of forward models and need no a priori infor
 mation on physical or topological properties of the unknown objects to be 
 reconstructed. One of the drawbacks of currently available qualitative rec
 onstruction methods is the large amount of data required by most of these 
 algorithms. It is usually assumed that measurement data of waves scattered
  by the unknown objects corresponding to infinitely many primary waves are
  given - at least theoretically.\n\nWe consider the inverse source problem
  for the Helmholtz equation as a means to provide a qualitative inversion 
 algorithm for inverse scattering problems for acoustic or electromagnetic 
 waves with a single excitation only. Probing an ensemble of obstacles by j
 ust one primary wave at a fixed frequency and measuring the far field of t
 he corresponding scattered wave\, the inverse scattering problem that we a
 re interested in consists in reconstructing the support of the scatterers.
  To this end we rewrite the scattering problem as a source problem and app
 ly two recently developed algorithms - the inverse Radon approximation and
  the convex scattering support - to recover information on the support of 
 the corresponding source. The first method builds upon a windowed Fourier 
 transform of the far field data followed by a filtered backprojection\, an
 d although this procedure yields a rather blurry reconstruction\, it can b
 e applied to identify the number and the positions of well separated sourc
 e components. This information is then utilized to split the far field int
 o individual far field patterns radiated by each of the well separated sou
 rce components using a Galerkin scheme\, and to compute the associated con
 vex scattering supports as a reconstruction of the individual scatterers. 
 We discuss this algorithm and present numerical results.
DTEND;TZID=Europe/Berlin:20130523T163000
DTSTAMP;TZID=Europe/Berlin:20130520T022000
DTSTART;TZID=Europe/Berlin:20130523T151500
LOCATION:MPI für Mathematik in den Naturwissenschaften Leipzig\, Inselstr.
  22\, Leibniz-Hörsaal (G 10)
ORGANIZER;CN=Valeria Hünniger:mailto:Valeria.Huenniger@mis.mpg.de
PRIORITY:5
SUMMARY:Roland Griesmaier (Universität Leipzig): Single Frequency Inverse 
 Scattering by Fourier Extrapolation
UID:www.mis.mpg.de_13548
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
DESCRIPTION:Colloquium of the Max Planck Institute\nOne-dimensional random 
 interfaces occur for example in random growth models and random tiling mod
 els.\n\nIn some models their statistical properties turn out to be related
  to random matrix statistics.\nI will concentrate on random tiling or dime
 r models like the Aztec diamond and discuss the statistics of the tiles/di
 mers. The models can also be interpreted as certain random surfaces. Assoc
 iated with these models are \nrandom point processes that are so called de
 terminantal point processes. I will discuss these processes and their scal
 ing limits which\nare expected to be universal scaling limits in the sense
  that they should be natural scaling limits in\nvarious models. The talk w
 ill give an overview of some developments in this area aimed at a general 
 audience.
DTEND;TZID=Europe/Berlin:20130527T173000
DTSTAMP;TZID=Europe/Berlin:20130520T022000
DTSTART;TZID=Europe/Berlin:20130527T160000
LOCATION:MPI für Mathematik in den Naturwissenschaften Leipzig\, Inselstr.
  22\, Leibniz-Hörsaal (G 10)
ORGANIZER;CN=Jörg Lehnert:mailto:Joerg.Lehnert@mis.mpg.de
PRIORITY:5
SUMMARY:Kurt Johansson (KTH Stockholm\, Sweden): Random interfaces and rand
 om matrices
UID:www.mis.mpg.de_12678
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
DESCRIPTION:Vortrag in der Reihe: Oberseminar ANALYSIS - PROBABILITY\nIn a 
 joint work with Christophe Sabot (2011)\, we show an explicit link between
  the Edge-reinforced random walk (ERRW)\, introduced by Coppersmith and Di
 aconis in 1986\, and the supersymmetric hyperbolic sigma model developed b
 y Zirnbauer in 1996\, through another continuous-time process conceived by
  Werner in 2000\, the Vertex-reinforced jump process (VRJP)\, favouring si
 tes with more local time.\n\nThis correspondence enables to show Diaconis'
  conjecture that ERRW is strongly recurrent in any dimension for large rei
 nforcement (in fact on any graph of bounded degree)\, and that it is trans
 ient in dimension larger than 3\, using localisation/delocalization techni
 ques of Disertori\, Spencer and Zirnbauer (2010).
DTEND;TZID=Europe/Berlin:20130528T164500
DTSTAMP;TZID=Europe/Berlin:20130520T022000
DTSTART;TZID=Europe/Berlin:20130528T151500
LOCATION:MPI für Mathematik in den Naturwissenschaften Leipzig\, Inselstr.
  22\, Sophus-Lie-Seminarraum (A 01)
ORGANIZER;CN=Katja Heid:mailto:Katja.Heid@mis.mpg.de
PRIORITY:5
SUMMARY:Pierre Tarrès (Institut de Mathématiques de Toulouse): Reinforced
  random walks and statistical physics
UID:www.mis.mpg.de_12987
END:VEVENT
BEGIN:VEVENT
ATTACH;FMTTYPE=application/pdf:http://www.mis.mpg.de/fileadmin/pdf/Matheges
 praeche-Mai-2013.pdf
CLASS:PUBLIC
DESCRIPTION:Vortrag in der Reihe: Leipziger Gespräche zur Mathematik\n<a h
 ref="http://www.mis.mpg.de/fileadmin/pdf/Mathegespraeche-Mai-2013.pdf">Abs
 tract zu dieser Veranstaltung</a> (PDF-Datei)
DTEND;TZID=Europe/Berlin:20130529T210000
DTSTAMP;TZID=Europe/Berlin:20130520T022000
DTSTART;TZID=Europe/Berlin:20130529T190000
LOCATION:Städtisches Kaufhaus Leipzig\, Neumarkt 9-19\, Ausstellung "Exper
 imente-Werkstatt Mathematik"
ORGANIZER;CN=Heiko Schinke:mailto:Heiko.Schinke@mis.mpg.de
PRIORITY:5
SUMMARY:Wolfgang König (Technischen Universität Berlin und Weierstraß-In
 stitut für Angewandte Analysis und Stochastik\, Germany): Was ist Zufall\
 , und wie kam er in die Mathematik?
UID:www.mis.mpg.de_13602
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
DESCRIPTION:Vortrag in der Reihe: Oberseminar ANALYSIS - PROBABILITY
DTEND;TZID=Europe/Berlin:20130604T164500
DTSTAMP;TZID=Europe/Berlin:20130520T022000
DTSTART;TZID=Europe/Berlin:20130604T151500
LOCATION:MPI für Mathematik in den Naturwissenschaften Leipzig\, Inselstr.
  22\, Sophus-Lie-Seminarraum (A 01)
ORGANIZER;CN=Katja Heid:mailto:Katja.Heid@mis.mpg.de
PRIORITY:5
SUMMARY:Rémi Rhodes (CEREMADE - Université Paris-Dauphine): Liouville Bro
 wnian motion in 2d Liouville quantum gravity
UID:www.mis.mpg.de_12958
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
DESCRIPTION:Colloquium of the Max Planck Institute\nIn most situations of m
 odern materials science\, several scales have to be considered sequentiall
 y\, or concurrently. This raises several fundamental questions and give ri
 se to challenging computational issues. This is especially true when the m
 aterials considered have no simple\, regular structure. The talk will over
 view some mathematical (and numerical) questions in this area. The level o
 f exposition will be deliberately kept elementary. The flavour of the math
 ematical ingredients and techniques will be given\, the focus being on the
  questions raised rather than the answers provided.
DTEND;TZID=Europe/Berlin:20130607T121500
DTSTAMP;TZID=Europe/Berlin:20130520T022000
DTSTART;TZID=Europe/Berlin:20130607T110000
LOCATION:MPI für Mathematik in den Naturwissenschaften Leipzig\, Inselstr.
  22\, Leibniz-Hörsaal (G 10)
ORGANIZER;CN=Jörg Lehnert:mailto:Joerg.Lehnert@mis.mpg.de
PRIORITY:5
SUMMARY:Claude Le Bris (Ecole Nationale des Ponts et Chaussées\, France): 
 Recent trends and open mathematical questions in materials science
UID:www.mis.mpg.de_12912
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
DESCRIPTION:Many evolutionary and self-organization pressures can be charac
 terized information theoretically not only because it's an approximation u
 seful in designing biologically-inspired systems\, but also because numero
 us optimal structures evolve/self-organize in nature when information dyna
 mics approach critical points. The talk will focus on information dynamics
  of computation within spatio-temporal systems in terms of three fundament
 al operations: information storage\, transfer\, and modification\, quantif
 ying these operations on a local scale in space and time. The methods will
  be exemplified in different contexts\, including swarms\, computational n
 euroscience\, and random Boolean networks. In addition\, we shall discuss 
 a relation between Fisher information and phase transitions / order parame
 ters\, drawing from both thermodynamics and statistical estimation theory\
 , as well as a thermodynamic interpretation of transfer entropy.
DTEND;TZID=Europe/Berlin:20130702T151500
DTSTAMP;TZID=Europe/Berlin:20130520T022000
DTSTART;TZID=Europe/Berlin:20130702T140000
LOCATION:MPI für Mathematik in den Naturwissenschaften Leipzig\, Inselstr.
  22\, Sophus-Lie-Seminarraum (A 01)
ORGANIZER;CN=Antje Vandenberg:mailto:Antje.Vandenberg@mis.mpg.de
PRIORITY:5
SUMMARY:Mikhail Prokopenko (CSIRO\, Sydney\, Australia): Information Dynami
 cs at the Edge of Chaos
UID:www.mis.mpg.de_13497
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
DESCRIPTION:
DTEND;TZID=Europe/Berlin:20130708T161500
DTSTAMP;TZID=Europe/Berlin:20130520T022000
DTSTART;TZID=Europe/Berlin:20130708T151500
LOCATION:MPI für Mathematik in den Naturwissenschaften Leipzig\, Inselstr.
  22\, Sophus-Lie-Seminarraum (A 01)
ORGANIZER;CN=Antje Vandenberg:mailto:Antje.Vandenberg@mis.mpg.de
PRIORITY:5
SUMMARY:Joseph Lizier (CSIRO\, Sydney\, Australia): to be announced
UID:www.mis.mpg.de_13709
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
DESCRIPTION:
DTEND;TZID=Europe/Berlin:20130710T173000
DTSTAMP;TZID=Europe/Berlin:20130520T022000
DTSTART;TZID=Europe/Berlin:20130710T163000
LOCATION:Universität Leipzig\, Augustusplatz 10\, Augusteum - Felix-Klein-
 Hörsaal
ORGANIZER;CN=Katja Heid:mailto:Katja.Heid@mis.mpg.de
PRIORITY:5
SUMMARY:Wolfgang Lück (Universität Bonn): to be announced
UID:www.mis.mpg.de_12269
END:VEVENT
BEGIN:VEVENT
CLASS:PUBLIC
DESCRIPTION:Vortrag in der Reihe: Arbeitsgemeinschaft ANGEWANDTE ANALYSIS
DTEND;TZID=Europe/Berlin:20131115T114500
DTSTAMP;TZID=Europe/Berlin:20130520T022000
DTSTART;TZID=Europe/Berlin:20131115T101500
LOCATION:MPI für Mathematik in den Naturwissenschaften Leipzig\, Inselstr.
  22\, Sophus-Lie-Seminarraum (A 01)
ORGANIZER;CN=Katja Heid:mailto:Katja.Heid@mis.mpg.de
PRIORITY:5
SUMMARY:Karin Borgmeyer (Universität Konstanz): to be announced
UID:www.mis.mpg.de_13269
END:VEVENT
END:VCALENDAR