Veranstaltungen
Viele Veranstaltungen werden aktuell online durchgeführt. Informationen zum Zugang finden Sie jeweils unter „mehr” bei dem betreffenden Eintrag.
- Dienstag, 04.04.2023, 15:00 Uhr (WIAS-405-406)
- Seminar Modern Methods in Applied Stochastics and Nonparametric Statistics
Dr. Robert A. Vandermeulen, TU Berlin:
Beating the nonparametric curse of dimensionality using multi-view density estimators (hybrid talk)
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, 4. Etage, Raum: 405/406
Abstrakt
The curse of dimensionality is a famous statistical phenomenon that is perhaps nowhere better exemplified than in the task of nonparametric density estimation. Here the curse of dimensionality is not only evident in practical applications, but there is a very robust corpus of theoretical work that demonstrate the curse of dimensionality. This talk will cover recent work on nonparametric density estimation that utilizes multi-view models, which are a type of low-rank model, to obviate the curse of dimensionality and give dimension-independent rates of convergence.
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Dieser Vortrag findet bei Zoom statt: https://zoom.us/j/492088715
Veranstalter
WIAS Berlin
- Montag, 17.04.2023, 10:00 Uhr (ATB)
- Leibniz MMS Days
Leibniz MMS Days 2023
mehr ... Veranstaltungsort
Agricultural Engineering and Bioeconomy Potsdam
Veranstalter
Leibniz Institute for Agricultural Engineering and Bioeconomy
WIAS Berlin
- Mittwoch, 19.04.2023, 11:30 Uhr (WIAS-405-406)
- Seminar Interacting Random Systems
Tejas Iyer, WIAS Berlin:
Properties of recursive trees with independent fitnesses
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, 4. Etage, Raum: 405/406
Abstrakt
We study a general model of recursive trees, where nodes are equipped with random weights, arrive one at a time, and connect to existing nodes with probability proportional to a general function of their degree and their weight. We study the limiting infinite tree associated with this model, and show that, under a certain 'explosive' regime, the limiting tree has only a single node of infinite degree, or a single infinite path. We provide sufficient criteria to determine which occurs. Based, in part, on joint work with Bas Lodewijks.
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Seminar Interacting Random Systems (Hybrid Event)
Veranstalter
WIAS Berlin
- Mittwoch, 19.04.2023, 14:00 Uhr (WIAS-ESH)
- Berliner Oberseminar „Nichtlineare partielle Differentialgleichungen” (Langenbach-Seminar)
Dr. Daniel Hauer, The University of Sidney, Australien:
The fundamental gap conjecture (hybrid talk)
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, Erdgeschoss, Erhard-Schmidt-Hörsaal
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Oberseminar “Nichtlineare Partielle Differentialgleichungen” (Langenbach Seminar)
Veranstalter
Humboldt-Universität zu Berlin
WIAS Berlin
- Mittwoch, 19.04.2023, 15:15 Uhr (WIAS-ESH)
- Berliner Oberseminar „Nichtlineare partielle Differentialgleichungen” (Langenbach-Seminar)
Leon Schütz, WIAS Berlin:
An existence theory for solitary waves on a ferrofluid jet (hybrid talk)
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, Erdgeschoss, Erhard-Schmidt-Hörsaal
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Berliner Oberseminar “Nichtlineare partielle Differentialgleichungen” (Langenbach-Seminar)
Veranstalter
Humboldt-Universität zu Berlin
WIAS Berlin
- Mittwoch, 26.04.2023, 11:30 Uhr (WIAS-405-406)
- Seminar Interacting Random Systems
Heide Langhammer, WIAS Berlin:
tba
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, 4. Etage, Raum: 405/406
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Seminar Interacting Random Systems (Hybrid Event)
Veranstalter
WIAS Berlin
- Mittwoch, 26.04.2023, 15:15 Uhr (WIAS-ESH)
- Berliner Oberseminar „Nichtlineare partielle Differentialgleichungen” (Langenbach-Seminar)
Prof. Dr. Pierluigi Colli, Università di Pavia, Italien:
The Cahn--Hilliard--Oono system with control in the mass term (hybrid talk)
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, Erdgeschoss, Erhard-Schmidt-Hörsaal
Abstrakt
The problem of optimal control for the Cahn--Hilliard--Oono system is addressed, where the control u is located in the mass term. First, well-posedness of the problem and the dependence of the phase variable on the control u are considered, all this by admitting general potentials that include both the case of regular potentials and the case of some singular potential. Next, the so-called separation property is discussed: it holds for everywhere defined regular potentials in 2D and 3D and for the logarithmic potential in 2D. Finally, in this framework, for the control problem it is shown that an optimal control exists; the control-to-state map is Frechet differentiable; a proper variational inequality involving the solution of an adjoint system is a necessary condition for optimality. The results reported in this talk have been obtained in a collaboration with G. Gilardi, E. Rocca and J. Sprekels.
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Berliner Oberseminar “Nichtlineare partielle Differentialgleichungen” (Langenbach-Seminar)
Veranstalter
Humboldt-Universität zu Berlin
WIAS Berlin
- Mittwoch, 03.05.2023, 11:30 Uhr (WIAS-405-406)
- Seminar Interacting Random Systems
Luisa Andreis, Politecnico di Milano, Italien:
tba
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, 4. Etage, Raum: 405/406
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Seminar Interacting Random Systems (Hybrid Event)
Veranstalter
WIAS Berlin
- Dienstag, 09.05.2023, 11:30 Uhr (WIAS-405-406)
- Seminar Interacting Random Systems
Julian Kern, WIAS Berlin:
The crux of the non-gradient method
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, 4. Etage, Raum: 405/406
Abstrakt
Most particle systems that have been studied so far have a so-called gradient property. However, the gradient property seems to be very special and only few systems exhibit it. Unfortunately, non-gradient systems prove to be much harder to analyze. The aim of this talk is to introduce the ideas for proving a hydrodynamic limit (= law of large numbers) for a non-gradient system. Focus is on the structure of the proof. In particular, we will identify which part of the proof becomes much more difficult without the gradient property.
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Seminar Interacting Random Systems (Hybrid Event)
Veranstalter
WIAS Berlin
- Dienstag, 16.05.2023, 11:30 Uhr (WIAS-405-406)
- Seminar Interacting Random Systems
Christian Hirsch, Aarhus University, Dänemark:
tba
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, 4. Etage, Raum: 405/406
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Seminar Interacting Random Systems (Hybrid Event)
Veranstalter
WIAS Berlin
- Mittwoch, 17.05.2023, 11:30 Uhr (WIAS-405-406)
- Seminar Interacting Random Systems
Clément Erignoux, INRIA Lille, Frankreich:
Symmetric and asymmetric hydrodynamics for the facilitated exclusion process via mapping
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, 4. Etage, Raum: 405/406
Abstrakt
The facilitated exclusion process is a degenerate kinetically constrained lattice gas, in which particles can hop to an empty neighboring site provided that another neighboring site is also occupied. Because of the kinetic constraint, the system in dimension 1 exhibits two phases, a frozen phase at density less than 1/2, and a diffusive phase at density larger than 1/2. For this reason, standard entropic tools cannot be used to straightforwardly derive its macroscopic behavior, in particular its hydrodynamic limit. To workaround this issue, we exploit a classical mapping between exclusion and zero-range processes, and deduce from the hydrodynamic limit of the zero-range process that of the exclusion process. Despite the lack of smoothness of the various macroscopic limits, thanks to the attractiveness of the zero-range process, this allows to derive the hydrodynamic limits in both the symmetric and asymmetric case. Based on JW With O. Blondel, M. Sasada, M. Simon and L. Zhao
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Seminar Interacting Random Systems (Hybrid Event)
Veranstalter
WIAS Berlin
- Mittwoch, 24.05.2023, 11:30 Uhr (WIAS-405-406)
- Seminar Interacting Random Systems
Renato Soares dos Santos, Universidade Federal de Minas Gerais (UFMG), Brasilien:
tba
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, 4. Etage, Raum: 405/406
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Seminar Interacting Random Systems (Hybrid Event)
Veranstalter
WIAS Berlin
- Mittwoch, 07.06.2023, 11:30 Uhr (WIAS-405-406)
- Seminar Interacting Random Systems
Günter Last, Karlsruher Institut für Technologie:
tba
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, 4. Etage, Raum: 405/406
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Seminar Interacting Random Systems (Hybrid Event)
Veranstalter
WIAS Berlin
- 3. – 5. Juli 2023 (WIAS-ESH)
- Workshop/Konferenz: Nonlinear Dynamics in Semiconductor Lasers 2023
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, Erdgeschoss, Erhard-Schmidt-Hörsaal
Veranstalter
Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik
WIAS Berlin
- Freitag, 07.07.2023, 08:00 Uhr (Harnack-Haus)
- Workshop: Phase transitions in random point systems
Phase transitions in random point systems
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Harnack-Haus -- Tagungsstätte der Max-Planck-Gesellschaft
Veranstalter
WIAS Berlin
DFG Schwerpunktprogramm 2265
- Montag, 17.07.2023, 09:00 Uhr (Harnack-Haus)
- SPP2265 Summer School: Probability and geometry on configuration spaces
SPP2265 Summer School: Probability and geometry on configuration spaces
mehr ... Veranstaltungsort
Harnack-Haus -- Tagungsstätte der Max-Planck-Gesellschaft
Veranstalter
WIAS Berlin
DFG Schwerpunktprogramm 2265
- 30. August – 1. September 2023 (WIAS-ESH)
- Workshop/Konferenz: Workshop on Biophysics-based modeling and data assimilation in medical imaging 2023
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, Erdgeschoss, Erhard-Schmidt-Hörsaal
Veranstalter
WIAS Berlin
Charité - Universitätsmedizin Berlin
- 13. – 15. September 2023 (WIAS-ESH)
- Workshop/Konferenz: Energetic Methods for Multi-Component Reactive Mixtures Modelling Stability and Asymptotic Analysis
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, Erdgeschoss, Erhard-Schmidt-Hörsaal
Abstrakt
The central theme of this workshop are mechanical models describing the transport of mass, momentum, and energy in multi-component mixtures, including diffusion, convection, and heat transfer. A consistent account of reactions is a further concern. EMRM 2023 focuses in particular on energetic and entropic tools for strongly coupled systems of hyperbolic--parabolic type, whose analysis is still underdeveloped and has received insufficient attention relative to their tremendous significance in real-world applications. Many complex physical processes not only involve mass transfer induced by random diffusion, but also reaction processes and directed transport including non-local drifts induced, for instance, by the interaction of electrically charged particles. The relative influence of these different processes will depend on the specific application. Developing a framework that asymptotically relates the different models is nowadays an active field of research in multi-component flow modelling. This workshop focuses on the analysis of multi-component mixtures using diffusion models and hydrodynamic models, on the analysis of complex evolutionary systems of hyperbolic--parabolic type, including multi-phase problems, as well as on the connections between these approaches by means of asymptotic analysis.
Veranstalter
WIAS Berlin
Technische Universität Wien