Abstract
LetG be a torsion free polycyclic-by-finite group andD be the field of fractions of the group algebraKG. Then any periodic subgroup ofD n is locally finite. This answers a question posed by D. Farkas.
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Lichtman, A.I. On linear groups over a field of fractions of a polycyclic group ring. Israel J. Math. 42, 318–326 (1982). https://doi.org/10.1007/BF02761413
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DOI: https://doi.org/10.1007/BF02761413