Non-arithmetic hybrid lattices in $\mathrm{PU}(2,1)$
Wells, Joseph · arXiv (Cornell University) · 2019
We explore hybrid subgroups of certain non-arithmetic lattices in $\mathrm{PU}(2,1)$. We show that all of Mostow's lattices are virtually hybrids; moreover, we show that some of these non-arithmetic lattices are hybrids of two non-commensurable arithmetic lattices in $\mathrm{PU}(1,1)$.