Ioannis Papavasileiou

collaborators

3 papers

math.GR2023

Finite subgroups of automorphisms of free products

Ioannis Papavasileiou, Dionysios Syrigos

We study finite subgroups of outer automorphisms of free products. We give upper bounds for the orders of these finite subgroups as well as bounds for the orders of individual tors…

math.GR2023

Dynamics of iwip automorphisms of free products

Ioannis Papavasileiou, Dionysios Syrigos

Let $G$ be a free product and $Out (G)$ the outer automorphism group of $G$ . In this article using the theory of laminations we give a criterion for a subgroup $H$ of $\mat…

math.GR2021

Translation lengths of outer automorphisms of finitely generated free-by-finite groups

Ioannis Papavasileiou, Mihalis Sykiotis

Bestvina, Feighn and Handel proved that every subgroup of the outer automorphism group, $Out (F_{n})$ , of the free group of rank $n$ is either virtually finitely generated ab…