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Translated from Matematicheskie Zametki, Vol. 49, No. 2, pp. 14–22, February, 1991.
In conclusion, the author conveys gratitude to A. M. Stepin for stating the problem and to R. I. Grigorchuk for some useful advice on improving the contents of the text.
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Ageev, O.N. Actions by automorphisms of commutative compact groups with a countablefold Lebesgue component in the spectrum. Mathematical Notes of the Academy of Sciences of the USSR 49, 124–130 (1991). https://doi.org/10.1007/BF01137540
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DOI: https://doi.org/10.1007/BF01137540