I'm Valentin Rappel

About

I'm a postdoctoral researcher in the working group of Prof. Dr. Peter Littelmann at the Mathematical Institute of the University of Cologne. My research is focused around topics related to affine Demazure modules and the Path model. Before that I worked on topics of the representation theory of current algebras in the working group of Prof. Dr. Deniz Kus at Ruhr-Universität Bochum. I've done my PhD working on project B4 "Loop groups and the Path model" of the SFB/TRR 191 under supervision of Prof. Dr. Peter Littelmann at the Mathematical Institute of the University of Cologne.

My Interests

Loop Groups

Compact Lie / Complex Algebraic Groups

Littelmann Path Model

Affine Demazure Modules

(Pre-)Publications

Pieri formulas, higher level Demazure crystals and numerical multiplicities of excellent filtrations PhD Thesis: The path model and Bott-Samelson manifolds in the context of loop groups

Slides

Complex structures on Bott-Samelson manifolds using the path model(2020)
ABCD Seminar 2018

Teaching

At University of Cologne

Vorlesung SS 2024: Lie-Algebren (ILIAS-Link)

Vorlesung WS 2023/24: Quantengruppen

Seminar SS 22/23: Darstellungstheorie endlicher Gruppen

Seminar: Algebraische Geometrie II WS 19/20

Algebraische Gruppen SS 19 Teaching Assistant

Seminar: Algebraische Geometrie SS 19

Affine Lie Algebren WS 18/19 Teaching Assistant

Schleifengruppen WS 17/18 Teaching Assistant

Total Positivity SS 17 Teaching Assistant

Lineare Algebraische Gruppen WS 16/17 Teaching Assistant