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2.15 (1966)

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Does there exist a torsion-free group such that the factor group by some term of its upper central series is nontrivial periodic, with a bound on the orders of the elements?

Contributor: G. A. Karasëv

Progress

Yes, such groups do exist (S. I. Adian, Proc. Steklov Inst. Math., 112 (1971), 61–69).

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