Wednesday 30 April 2025 at 11:30 am, as part of the Al@Bicocca seminar cycle, Simone Blumer (University of Vienna) will give the following talk
Title: Subgroups of Bestvina-Brady groups
Abstract: Right-angled Artin groups (RAAGs) form a mysterious and rich class of groups that interpolates between the free groups and the free abelian groups. They are defined by a given graph, with generators corresponding to its vertices and commutator relations imposed for adjacent vertices. Unlike the case of free (abelian) groups, a subgroup of a RAAG may not be RAAG itself. In this direction, in 1987, Carl Droms characterised the graphs for which every subgroup of the associated RAAG is itself a RAAG. In this talk we will deal with a similar problem for certain normal subgroups of RAAGs, called Bestvina-Brady groups, which have been extensively studied over the last 20 years, as they provide counterexamples to several group-theoretic problems.
Information to attend
The seminar will be held in Room 3014 (3rd Floor) - U5 Building, University of Milano-Bicocca and will also be available online by this link
For more information, visit the website