Research Interests
					My interest is in finite and infinite groups and its actions.
					
Groups and geometries
					For instance structure of finite groups; Kac-Moody Groups; Aut(F
n); reflection
					groups, Coxeter groups and generalisations (such as extended or elliptic Weyl groups).
					
					
Presentation of groups and the underlying combinatorics
					For instance Artin groups; in particular the dual
					approach to Coxeter and Artin groups as well as to elliptic Weyl groups; Hurwitz action; non-crossing partition
					posets and lattices.
					
					
					This is the latest research topic
					
					
					
Permutation groups acting on finite or infinite sets
					For instance regular subgroups of primitve permutation
					groups.
					
					
Group theory and applications
					For instance permutation polytopes; Cryptography