Uncountable groups in which normality is a transitive relation

被引:6
|
作者
De Falco, M. [1 ]
De Giovanni, F. [1 ]
Musella, C. [1 ]
Sysak, Y. P. [2 ]
机构
[1] Univ Napoli Federico II Complesso Univ, Dipartimento Matemat & Applicaz, Monte S Angelo Via Cintia, Naples, Italy
[2] Ukrainian Natl Acad Sci, Inst Math, Vul Tereshchenkivska 3, UA-01601 Kiev, Ukraine
关键词
Uncountable group; subnormal subgroup; T-group; SUBGROUPS;
D O I
10.1142/S0218196719500188
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
A group is called a T-group if all its subnormal subgroups are normal. It is proved here that if G is an uncountable soluble periodic group of regular cardinality aleph in which all subnormal subgroups of cardinality aleph are normal, then G is a T-group, provided that it satisfies a suitable residual condition. An example shows that this latter restriction cannot be avoided.
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页码:627 / 638
页数:12
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