Reidemeister numbers for arithmetic Borel subgroups in type A

Paula Macedo Lins de Araujo, Yuri Santos Rego

The Reidemeister number $R(\phi )$ of a group automorphism $\phi \in \mathrm{Aut}(G)$ encodes the number of orbits of the $\phi$-twisted conjugation action of $G$ on itself, and the Reidemeis…