Density of the Commensurability Groups o
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Y.S. Liu
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Article
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1994
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Elsevier Science
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English
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Let \(X\) be a universal cover of a finite connected graph, and \(\Gamma\) a group acting discretely and cocompactly on \(X\), i.e., a uniform lattice on \(X\). We announce a proof of the conjecture of H. Bass and R. Kulkarni (J. Amer. Math. Soc. No. 4 (1990), 843-902) that the commensurability grou