Ruhr-University Bochum and Technical University of Munich
Tuesdays 12-14 (CET)
Organized by: Deniz Kus (TUM), Markus Reineke (RUB)
The Ruhr University Bochum and the Technical University of Munich jointly organize an Oberseminar on Representation Theory. The seminar serves as a platform to present and discuss recent developments in algebra, representation theory, and related fields.
Talks are scheduled on Tuesdays, 12:15–13:45 (CET) and typically last about 60 minutes including discussion. Most talks take place online; only a few will be held on-site and streamed.
If you are interested in attending, please contact one of the organizers to receive the link.
20.10.26: Alice Dell'Arciprete (RUB)
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27.10.26: details via email
03.11.26: Élie Casbi (University of Vienna)
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10.11.26: Divya Setia (Polish Academy of Sciences IMPAN)
Title: Tensor decomposition of Demazure crystals
Abstract: The study of Demazure crystals has been a central topic in representation theory for several years. The talk will be based on exploring the decomposition problem for the tensor product of Demazure crystals. In general, it is not necessary that the tensor product of Demazure crystals decomposes as a disjoint union of Demazure crystals. In this talk, I will discuss the necessary and sufficient conditions obtained in our recent work for the decomposition of the tensor product of Demazure crystals as a disjoint union of Demazure crystals for symmetrizable Kac-Moody Lie algebras. Theseresults also provide a partial solution to the key positivity problem.
17.11.26: Igor Makhlin (TU Berlin)
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24.11.26: details via email
01.12.26: details via email
08.12.26: details via email
15.12.26: details via email
12.01.27: Stefan Kolb (Newcastle University)
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19.01.27 : Huafeng Zhang (Université de Lille)
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26.01.27: details via email