Monday 10 November 2025 at 3 pm, as part of the Al@Bicocca seminar cycle, Islam Foniqi (University of East Anglia) will give the following talk
Title: From RAAGs to Twisted RAAGs: Extending Droms' Theorems
Abstract: Right-angled Artin groups (RAAGs) play a significant role in bridging combinatorics and group theory, as the structure of a group is determined by its defining graph. Twisted right-angled Artin groups (T-RAAGs), extend this idea by introducing directed edges, allowing us to encode both commutation and certain “twisted” relations. In this talk, based on joint work with Simone Blumer and Claudio Quadrelli, we show how the classical theorems of Droms for RAAGs can be extended to this broader setting. We describe precisely which T-RAAGs have all finitely generated subgroups that are again T-RAAGs, provide a graph-theoretic characterization of when these groups are coherent, and solve the isomorphism problem for an important subclass.
Information to attend
The seminar will be held in Room U6-38 (U6 Building - Piazza dell'Ateneo Nuovo 1, Milano) University of Milano-Bicocca and will also be available online by this link
For more information, visit the website