Twisted conjugacy classes of automorphisms of Baumslag-Solitar groups

Alexander Fel'shtyn, Daciberg L. Goncalves

Let $\varphi :G\to G$ be a group endomorphism where $G$ is a finitely generated group of exponential growth, and denote by $R(\varphi )$ the number of twisted $\varphi$-conjugacy classes. Fel'shtyn a…