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math.GR2023
Cubulating Drilled bundles over graphs
Mahan Mj, Biswajit Nag
We start with a Gromov-hyperbolic surface bundle over a graph, and drill out essential simple closed curves from fibers to obtain a drilled bundle . We prove that for such d…
math.GR2023
Indiscrete Common Commensurators
Jingyin Huang, Mahan Mj
We develop a framework for common commensurators of discrete subgroups of lattices in isometry groups of CAT(0) spaces. We show that the Greenberg-Shalom hypothesis about discreten…