Congruence counting in Schottky and continued fractions semigroups of $\mathrm{SO}(n,1)$

Pratyush Sarkar

In this paper, the two settings we are concerned with are $\Gamma <\mathrm{SO}(n,1)$ a Zariski dense Schottky semigroup and $\Gamma <{\mathrm{SL}}_2(\mathbb{C})$ a Zariski dense co…