We consider groups in which H3(G) is both nontrivial and proper. In particular, it is proved that in such a group, |G : H3(G)| = 3.
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Supported by the NNSF of China (grant No. 12171126) and by Key Laboratory of Engineering Modeling and Statistical Computation of Hainan Province.
Supported byMathematical Center in Akademgorodok, Agreement with RFMinistry of Education and Science No. 075-15-2019-1613.
Supported by RFBR (project No. 20-51-00007) and by SB RAS Fundamental Research Program I.1.1 (project No. 0314-2019-0001).
Translated from Algebra i Logika, Vol. 60, No. 3, pp. 298-302, May-June, 2021. Russian DOI: https://doi.org/10.33048/alglog.2021.60.303.
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Guo, W., Lytkina, D.V. & Mazurov, V.D. Infinite Groups Containing a Proper Hughes Subgroup H3(G). Algebra Logic 60, 196–199 (2021). https://doi.org/10.1007/s10469-021-09641-z
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DOI: https://doi.org/10.1007/s10469-021-09641-z