Algebraically hyperbolic groups Article Swipe
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· 2025
· Open Access
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· DOI: https://doi.org/10.4171/ggd/907
· OA: W3216257299
We initiate the study of torsion-free algebraically hyperbolic groups; these groups generalise torsion-free hyperbolic groups and are intricately related to groups with no Baumslag–Solitar subgroups. Indeed, for groups of cohomological dimension 2 , we prove that algebraic hyperbolicity is equivalent to containing no Baumslag–Solitar subgroups. This links algebraically hyperbolic groups to two famous questions of Gromov; recent work has shown these questions to have negative answers in general, but they remain open for groups of cohomological dimension 2 . We also prove that algebraically hyperbolic groups are conjugacy separated abelian (CSA), and so have canonical abelian JSJ-decompositions. In the two-generated case, we give a precise description of the form of these decompositions.
