Finitely presented kernels of homomorphisms from hyperbolic groups onto free abelian groups

Robert Kropholler, Claudio Llosa Isenrich

Published 2023-09-07Version 1

For every $m\geq 2$ we produce an example of a non-hyperbolic finitely presented subgroup $H < G$ of a hyperbolic group $G$, which is the kernel of a surjective homomorphism $\phi: G\to \mathbb{Z}^m$. The examples we produce are of finiteness type $F_2$ and not $F_3$.