On the action of relatively irreducible automorphisms on their train tracks

Stefano Francaviglia, Armando Martino, Dionysios Syrigos

Let $G$ be a group and let $\mathcal{G}$ be a free factor system of $G$, namely a free splitting of $G$ as $G=G_1\ast \cdots \ast G_k\ast F_r$. In this paper, we study the set of train track po…