FB 6 Mathematik/Informatik

Institut für Mathematik


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Kolloquium

22.01.2020 um 17:15 Uhr in 69/125

Dr. Georg Tamme (Universität Regensburg)

Descent in Algebraic K-Theory

Algebraic K-groups of rings are interesting invariants, which appear in different areas of mathematics, e.g. in number theory, algebraic geometry, or topology. Unfortunately, computations of algebraic K-groups are usually quite hard. One approach to compute the K-groups of a given ring is to build the ring up from simpler pieces, whose K-groups might be easier to compute. One then has to solve the problem of reassembling the information from the single pieces to say something about the K-groups of the ring one started with. This is a descent problem. I will give an introduction to the problem and explain some recent results and applications.

29.01.2020 um 17:15 Uhr in 69/125

Prof. Dr. Monika Ludwig (TU Wien)

Geometric Valuation Theory

Abstract

Oberseminar Angewandte Analysis

28.01.2020 um 14:15 Uhr in Raum 69/E23

Michael Schmischke (TU Chemnitz)

TBA

Oberseminar Stochastik

21.01.2020 um 12:00 Uhr in Raum 69/E15

Grace Itunuoluwa Akinwande

Poisson Limit Theorems for Z+-valued U-statistics

We give an abstract PLT for U-statistics with positive integer values, and for functionals related to the f-vector of a random simplicial complex in particular in particular

28.01.2020 um 13:00 Uhr in Raum 69/E15  -Uni-GK-

Alexander Nover

TBA

04.02.2020 um 12:00 Uhr in Raum 69/E15

Stephan Bussmann

TBA

Oberseminar Algebra

21.01.2020 um 16:15 Uhr in 69/125:

Graham Keiper (McMaster University, Canada)

Decompositions of Toric Ideals of Finite Simple Graphs

I will discuss recent joint work which allows us to construct new finite simple graphs from two known ones in a specified way such that the corresponding toric ideals split. This construction more generally behaves well with respect to generators of the toric ideals of the graphs used in the construction. In some cases the technique allows us to recover the graded betti numbers of the resulting graph given that this information is known for the graphs used to construct it. I will also discuss more general results about the independence of generators of toric ideals.

28.01.2020 um 16:15 Uhr in 69/125:

Jorge Alberto Olarte (RWTH Aachen)

TBA

Oberseminar Topologie