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Products of locally cyclic groups. (Italian. English summary) Zbl 0864.20015

It is known that if the group \(G\) is the product of finitely many pairwise permutable cyclic subgroups, then \(G\) is supersoluble [see H. Heineken and J. C. Lennox, Arch. Math. 41, 498-501 (1983; Zbl 0509.20017)]. Moreover, M. J. Tomkinson [ibid. 47, 107-112 (1986; Zbl 0596.20026)] proved that, if the factors are Chernikov and locally cyclic, then \(G\) is hypercyclic. In this paper the author proves that if the group \(G\) is the product of finitely many pairwise permutable subgroups which are minimax and locally cyclic, then \(G\) has a finite normal series with locally cyclic factors. Moreover, if the factors are not torsion-free non-cyclic groups, then \(G\) is hypercyclic.

MSC:

20E15 Chains and lattices of subgroups, subnormal subgroups
20E25 Local properties of groups
20E22 Extensions, wreath products, and other compositions of groups
20D40 Products of subgroups of abstract finite groups
20F16 Solvable groups, supersolvable groups
20F14 Derived series, central series, and generalizations for groups