Veranstaltungen

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Dienstag, 19.03.2024, 10:00 Uhr (WIAS-406)
Seminar Modern Methods in Applied Stochastics and Nonparametric Statistics
Dr. Alexandra Suvorikova, WIAS Berlin:
Bernstein-type inequalities for unbounded martingales and empirical processes
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, 4. Etage, Weierstraß-Hörsaal (Raum: 406)

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Hybrid event. Dieser Vortrag findet auch via Zoom statt: https://zoom.us/j/492088715

Veranstalter
Humboldt-Universität zu Berlin
Universität Potsdam
WIAS Berlin
Donnerstag, 04.04.2024, 16:00 Uhr (WIAS-ESH)
Forschungsseminar Mathematische Modelle der Photonik
Prof. Dmitry Turaev, Imperial College London, GB:
4-winged Lorez attractors
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, Erdgeschoss, Erhard-Schmidt-Hörsaal

Abstrakt
We show that bifurcations of periodic orbits with multipliers (-1,i,-i) can lead to the birth of pseudohyperbolic Lorenz-like attractors of three different types: one is a discrete analogue of the classical Lorenz attractor, and the other two are new:two- and four-winged Simo angels. These three attractors exist in an orientation-reversing, three-dimensional, quadratic Henon map. This implies the abundance of such attractors in a class of systems with homoclinic tangencies. Our analysis is based on the study of a normal form for this bifurcation, a slow-fast three-dimensional system of differential equations with a Z4-symmetry. The existence of the continuous-time counterparts of the pseudohyperbolic attractors is established for the normal form as a part of an extensive numerical analysis of its bifurcations. In particular, we establish that all three types of continuous-time pseudohyperbolic attractors are born out of a certain Z4-symmetric heteroclinic configurations with three saddles.

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Forschungsseminar Mathematische Modelle der Photonik

Veranstalter
WIAS Berlin
10. – 12. April 2024 (IVW)
Workshop/Konferenz: Leibniz MMS Days 2024
mehr ... Veranstaltungsort
Leibniz-Institut für Verbundwerkstoffe GmbH Kaiserslautern

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Leibniz-Institut fuer Verbundwerkstoffe GmbH IVW
WIAS Berlin
Mittwoch, 10.04.2024, 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, 10.04.2024, 14:15 Uhr (WIAS-ESH)
Berliner Oberseminar „Nichtlineare partielle Differentialgleichungen” (Langenbach-Seminar)
M.Sc. Tim Böhnlein, Technische Universität Darmstadt:
Bounded functional calculus and dynamical boundary conditions
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, Erdgeschoss, Erhard-Schmidt-Hörsaal

Abstrakt
We consider divergence form operators with complex coefficients on an open subset of Euclidean space. Boundary conditions in the corresponding parabolic problem are dynamical, that is, the time derivative appears on the boundary. As a matter of fact, the elliptic operator and its semigroup act simultaneously in the interior and on (a part of) the boundary. We extrapolate the bounded functional calculus in the Lebesgue scale. In particular, this implies maximal regularity as a starting point to treat nonlinear equations. Our strategy relies on extending a contractivity criterion due to Nittka and a non-linear heat flow method popularized by Carbonaro--Dragičević. This is joint work with Moritz Egert and Joachim Rehberg.

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Oberseminar “Nichtlineare Partielle Differentialgleichungen” (Langenbach Seminar)

Veranstalter
Humboldt-Universität zu Berlin
WIAS Berlin
Mittwoch, 24.04.2024, 11:30 Uhr (WIAS-405-406)
Seminar Interacting Random Systems
Julia Hörmann, 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
1. Juli 2024 (WIAS-ESH)
Workshop/Konferenz: Developments in Computational Finance - Honoring John Schoenmakers on the occasion of his retirement
mehr ... Veranstaltungsort
Weierstraß-Institut, Mohrenstr. 39, 10117 Berlin, Erdgeschoss, Erhard-Schmidt-Hörsaal

Veranstalter
WIAS Berlin