paper

On the isomorphism problem for generalized Baumslag-Solitar groups: invariants and flexible configurations

arXiv:2508.02306

Abstract

We prove that the isomorphism problem is decidable for generalized Baumslag-Solitar (GBS) groups with one quasi-conjugacy class and full support gaps. In order to do so we introduce a family of invariants that fully characterize the isomorphism within this class of GBSs.

52 pages, 2 appendices, 25 figures

On the isomorphism problem for generalized Baumslag-Solitar groups: invariants and flexible configurations · wovepaper