Mathematisches Kolloquium

geplante Vorträge für das WS 2017/18: 9.11.2017 / 23.11.2017 / 21.12.2017 / 8.2.2018

Die Vorträge der vergangenen Semester finden Sie in den Archiven unter Veranstaltungen-Mathe.

 


Donnerstag, 9. November 2017, 16:30 Uhr,  Carl-Zeiß-Str. 3, SR 114

Prof. Dr. Vlada Limic (Université Paris Sud 11)

Thema: Near-critical random graphs and multiplicative coalescents

Alle Interessenten sind herzlich eingeladen!

Donnerstag, 23. November 2017, 16:30 Uhr, Carl-Zeiß-Str. 3, SR 308

Prof. Dr. Andres Koropecki (Universidade Federal Fluminense)

Thema: Boundary dynamics for surface homeomorphisms

Abstract: I will discuss recent results about the dynamics on the boundary of invariant domains for a surface homeomorphism, and its relationship with the induced dynamics in the prime ends compactifications.

Alle Interessenten sind herzlich eingeladen!

Donnerstag, 21. Dezember 2017, 16:30 Uhr, Carl-Zeiß-Str. 3, Hörsaal 3

Prof. Dr. Harald Helfgott (Universität Göttingen)

Thema: "Voronoi and Eratosthenes: sieves and the divisor problem"

Abstract: We show how to carry out a sieve of Erastosthenes up to N in space O(N1/3) and essentially linear time. This improves over the usual versions, which take space about O(√N) and essentially linear time. The algorithm - which, like the one in (Galway, 2000), is ultimately related to diophantine approximation - can also be used to factorize integers n, and thus to give the values of arithmetical functions such as the Möbius function µ and the Liouville function λ for all integers up to N.

Alle Interessenten sind herzlich eingeladen!

Donnerstag, 8. Februar 2018, 16:30 Uhr, Carl-Zeiß-Str. 3, SR 309

Prof. Dr. Bernd Sturmfels (Max-Planck-Insitutut Leipzig)

Thema: "Tensors and their Eigenvectors"

Abstract: Eigenvectors of square matrices are central to linear algebra. Eigenvectors of tensors are a natural generalization. The spectral theory of tensors was pioneered by Lim and Qi around 2005. It has numerous applications, and ties in closely with optimization and dynamical systems. We present an introduction that emphasizes algebraic and geometric aspects.

Alle Interessenten sind herzlich eingeladen!