Abstract
For a finite group G, we define the subgroup S(G) to be the intersection of the normalizers of the nilpotent residuals of all subgroups of G. Set \(S_0=1\) and define \(S_{i+1}(G)/S_i(G)=S(G/S_i(G))\) for \(i\ge 1\). The terminal term of this upper series is denoted by \(S_{\infty }(G)\). This upper series implies a lot of information on the structure of G. In this paper, we solve several basic problems on S(G). If \(G=S(G)\), we call the finite group G an S-group. The new class of S-groups are investigated and some open problems on S-groups are posed. Furthermore, we develop the research on \(S_{\infty }(G)\) by a new idea and unify some known results.
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To celebrate the 80th birthday of Prof. Shirong Li.
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This work was completed with the support of the National Natural Science Foundation of China (no. 11771356) and the Natural Science Foundation of Fujian Province of China (no. 2019J01025)
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Shen, Z., Du, N. & Walls, G.L. On the Nilpotent Residual Norm of a Group and the Structure of S-Groups. Mediterr. J. Math. 19, 191 (2022). https://doi.org/10.1007/s00009-022-02101-7
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DOI: https://doi.org/10.1007/s00009-022-02101-7