Abstract
Let X be a universal cover of a finite connected graph. A uniform lattice on X is a group acting discretely and cocompactly on X. We provide a counterexample to Bass and Kulkarniâs Deformation Conjecture (1990) that a discrete subgroup $F \leq \operatorname {Aut} (X)$ could be deformed, outside some F-invariant subtree, into a uniform lattice.
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