Normal subgroup theorem for groups acting on $\widetilde A_{2}$-buildings
Abstract
Let \Gamma be a group acting with finite stabilizers and finite fundamental domain on a building of type \widetilde A_{2} . We prove that any non-trivial normal subgroup of \Gamma is of finite index in \Gamma .
Fields of Study & Subjects
Geometric and Algebraic Topology
Advanced Algebra and Geometry
Finite Group Theory Research
Publication details
- Journal / source
- Journal of the European Mathematical Society
- Publication date
- 30 January 2026
- Language
- EN