The main purpose of this paper is to investigate the behaviour of uncountable groups of cardinality {\mathfrak{m}} whose proper subgroups of cardinality {\mathfrak{m}} are (bounded) Engel groups. It is proved that such groups are (bounded) Engel groups, provided that they satisfy some generalized solubility condition. A similar analysis is carried out also for (generalized soluble) uncountable groups of cardinality {\mathfrak{m}} whose proper subgroups of cardinality {\mathfrak{m}} are hypercentral. In this case, we get that the whole group is hypercentral provided that the hypercentral lengths of the proper "large"subgroups are not too close to {\mathfrak{m}}. This generalizes results that have already been obtained for nilpotency. Finally, as a by-product, we obtain similar results for many other relevant group classes such as that of Gruenberg groups and that of 1{\mathcal{N}{1}}-groups.

Generalized nilpotency in uncountable groups / Ferrara, M.; Trombetti, M.. - In: FORUM MATHEMATICUM. - ISSN 0933-7741. - 34:3(2022), pp. 669-683. [10.1515/forum-2021-0137]

### Generalized nilpotency in uncountable groups

#### Abstract

The main purpose of this paper is to investigate the behaviour of uncountable groups of cardinality {\mathfrak{m}} whose proper subgroups of cardinality {\mathfrak{m}} are (bounded) Engel groups. It is proved that such groups are (bounded) Engel groups, provided that they satisfy some generalized solubility condition. A similar analysis is carried out also for (generalized soluble) uncountable groups of cardinality {\mathfrak{m}} whose proper subgroups of cardinality {\mathfrak{m}} are hypercentral. In this case, we get that the whole group is hypercentral provided that the hypercentral lengths of the proper "large"subgroups are not too close to {\mathfrak{m}}. This generalizes results that have already been obtained for nilpotency. Finally, as a by-product, we obtain similar results for many other relevant group classes such as that of Gruenberg groups and that of 1{\mathcal{N}{1}}-groups.
##### Scheda breve Scheda completa Scheda completa (DC)
2022
Generalized nilpotency in uncountable groups / Ferrara, M.; Trombetti, M.. - In: FORUM MATHEMATICUM. - ISSN 0933-7741. - 34:3(2022), pp. 669-683. [10.1515/forum-2021-0137]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/889681
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