Ioannis Papavasileiou, Dionysios Syrigos
Published 2023-09-08Version 1
Let $G$ be a free product and $\mathrm{Out}(G)$ the outer automorphism group of $G$. In this article using the theory of laminations we give a criterion for a subgroup $H$ of $\mathrm{Out}(G)$ to contain a nonabelian free subgroup. We also study the centraliser of an iwip element of $\mathrm{Out}(G)$ and the stabiliser of its associated lamination.
Comments: arXiv admin note: text overlap with arXiv:math/9712217 by other authors
One-endedness of outer automorphism groups of free products of finite and cyclic groups
A Presentation for the Outer Automorphism Group of a Free Product with No Free Rank
The Space of Traces of the Free Group and Free Products of Matrix Algebras
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