Newsarchiv: Aktuelles

24. Februar 2026

Verteidigung der Promotion von Herrn Atle Bjarne Steffen Höhne (Institut für Mathematik)

"History and Context of the Discovery of the Modern Sporadic Simple Groups"

Beginn: 10.00 Uhr

Ort: Hörsaal 1.04, Von-Seckendorff-Platz 1

22. Januar 2026

Kolloquium

Vortragende: Prof. Dr. Jenni Ingram (Universität Oxford)   

"Recognising mathematical communication: What counts as mathematical?"

Beginn: 16:15

Ort: Raum 1.04, VSP 1

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11. Dezember 2025

Weihnachtskolloquium

Vortragender: Prof. Dr. Konrad Polthier (FU Berlin)    

"Vibrations of Geometric Shapes"

Beginn: 16:15

Ort: Raum 1.04, VSP 1

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28. Oktober 2025

Kolloquium

Vortragender: Prof. Colm Mulcahy (Professor Emeritus, Spelman College, Atlanta, USA; Adjunct Professor, SETU Waterford, Ireland)   

"Mathemagic with a Deck of Cards"

https://cardcolm.org/halleSHORT.pdf   

Beginn: 16:15

Ort: Raum 3.07, VSP 1

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13. November 2025

Verteidigung der Promotion von Herrn Davide Manfredo

"Modelling and simulation of constitutive inelastic effects in composite cables by means of Prandl-Ishlinskii operators"

Beginn: 16.15 Uhr
Ort: Hörsaal 1.04, Von-Seckendorff-Platz 1

30.07.2025

Am 30.07.2025, 10.00 Uhr, findet im HS 1.04, Von-Seckendorff-Platz 1, die Promotionsverteidigung von Frau Melanie Möckel zum Thema „Bifurkation für ein stark indefinites elliptisches System partieller Differentialgleichungen mittels klassischem und äquivariantem Spektralfluss" statt.

07. November 2025

Verteidigung der Promotion von Frau Nahid Jamshidi (Institut für Mathematik)

"Model Order Reduction for Stochastic Differential Equations driven by Standard and Fractional Brownian motion."

Beginn: 13.00 Uhr

Ort: Hörsaal 1.23, Von-Seckendorff-Platz 1

03. Juli 2025

Kolloquium

Vortragender: Dr. Stephan Mescher (Universität Halle)

"On topological and geodesic complexities of manifolds“

Beginn: 16:15 Uhr

Ort: HS 1.04, VSP 1

Abstract:

In this talk, I want to outline the contents of my habilitation proposal to the institute, which I would to submit to the faculty in the near future. I will give an overview of my research projects from the previous years. Topological complexity (TC), as introduced by M. Farber in 2003, is an integer-valued homotopy invariant of topological spaces that is motivated by the motion planning problem from robotics.  After a short introduction to topological complexity (TC), I will first present lower bounds on topological complexities of closed manifolds. As consequences of these bounds,  we obtain a characterization of manifolds dominated by products in terms of TC as well as a computation of the TC of certain symplectic manifolds. I will also discuss the TC of frame bundles and explain how it can be seen as an abstraction of oriented motion planning. Afterwards, I will talk about geodesic complexity, an abstraction of motion planning along paths of minimal length. Several results on the geodesic complexity of homogeneous Riemannian manifolds, obtained by M. Stegemeyer and myself, will be discussed.

Moreover, I will present spherical complexities, which are invariants for loop and sphere spaces that resemble topological complexity and which can be used to obtain topological lower bounds for the number of critical orbits of  functionals on loop and sphere spaces which are invariant under orthogonal reparametrizations. I will also show how to apply such a bound to derive several new existence results for closed geodesics in spheres and projective spaces under curvature pinching conditions. If time permits, I may also speak about results on algebraic characterizations of the TC of aspherical spaces in terms of their fundamental groups.

17. Januar 2025

Verteidigung der Promotion von Herrn Tobias Bauer

"Multirate time integration methods and their application for coupled atmosphere ocean models"

Beginn: 13.00 Uhr
Ort: Hörsaal 3.04, Von-Seckendorff-Platz 1

8. November 2024

Verteidung der Promotion von Frau Manuela Paschkowski
"Analytical and Numerical Aspects of Non-Smooth Mechanics in the Context of Measure Differential Inclusions"

Zeit: 13:00 Uhr
Ort: VSP, HS 1.04

21. November 2024

Kolloquium

Vortragender: Jun.-Prof. Dr. Thomas Berger (Universität Paderborn)    

"Control with safety guarantees"

Beginn: 16:15 Uhr

Ort: HS 1.04, VSP 1

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24. Oktober 2024

Kolloquium

Vortragender: Prof. Dr. Gregor Nickel (Universität Siegen)   

"Mathematik und Bildung. Anmerkungen aus historischer und philosophischer Perspektive."

Beginn: 16:15 Uhr

Ort: HS 1.04 VSP 1

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