Abstract
We show that the existence of a sequence of elements from cocompact torsion-free arithmetic subgroups ofSL(2,R) converging to the identity is equivalent to the density of Salem numbers in [1,∞).
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Sury, B. Arithmetic groups and Salem numbers. Manuscripta Math 75, 97–102 (1992). https://doi.org/10.1007/BF02567074
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DOI: https://doi.org/10.1007/BF02567074