2 problems

Let $\Gamma$ be a virtually polycyclic group and let $\varphi:\Gamma\to\Gamma$ be an endomorphism. When the Reidemeister zeta function is well-defined, it is given by … where…

Let $P$ be a virtually polycyclic group and let $H$ be a subgroup of $P$. Hruska–Wise's bounded-packing conjecture. The subgroup $H$ has bounded packing in $P$. The claim concerns…