Abstract
In this paper groups in which the set Σ of the normal or self-normalizing subgroups is large will be studied. In particular it will be characterized locally graded groups satisfying the minimal condition on subgroups which do not belong to Σ and locally finite groups for which the set Σ is dense in the lattice of all subgroups.
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Galoppo, A. Groups with many normal or self-normalizing subgroups. Rend. Circ. Mat. Palermo 47, 397–408 (1998). https://doi.org/10.1007/BF02851388
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DOI: https://doi.org/10.1007/BF02851388