The visual boundary of hyperbolic free-by-cyclic groups

Yael Algom-Kfir, Arnaud Hilion, Emily Stark

Let $\varphi$ be an atoroidal outer automorphism of the free group $F_n$. We study the Gromov boundary of the hyperbolic group $G_{\varphi }=F_n{⋊}_{\varphi }\mathbb{Z}$. We explicitly describe a…