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ON THE PRONORM OF A GROUP

Part of: Special aspects of infinite or finite groups Structure and classification of infinite or finite groups

Published online by Cambridge University Press:  20 January 2021

MATTIA BRESCIA Open the ORCID record for MATTIA BRESCIA [Opens in a new window]  and
ALESSIO RUSSO Open the ORCID record for ALESSIO RUSSO [Opens in a new window]
MATTIA BRESCIA
Affiliation:
Dipartimento di Matematica e Applicazioni, Università degli Studi di Napoli Federico II, Corso Umberto I, 40, Napoli, Italy e-mail: mattia.brescia@unina.it
ALESSIO RUSSO*
Affiliation:
Dipartimento di Matematica e Fisica, Università degli Studi della Campania ‘Luigi Vanvitelli’, Viale Lincoln 5, Caserta, Italy
*
e-mail: alessio.russo@unicampania.it
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Abstract

The pronorm of a group G is the set $P(G)$ of all elements $g\in G$ such that X and $X^g$ are conjugate in ${\langle {X,X^g}\rangle }$ for every subgroup X of G. In general the pronorm is not a subgroup, but we give evidence of some classes of groups in which this property holds. We also investigate the structure of a generalised soluble group G whose pronorm contains a subgroup of finite index.

Keywords

pronormal subgrouppronorm of a groupT-group

MSC classification

Primary: 20E15: Chains and lattices of subgroups, subnormal subgroups
Secondary: 20F19: Generalizations of solvable and nilpotent groups
Type
Research Article
Information
Bulletin of the Australian Mathematical Society , Volume 104 , Issue 2 , October 2021 , pp. 287 - 294
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Copyright
© 2021 Australian Mathematical Publishing Association Inc.

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Footnotes

The authors are members of GNSAGA-INdAM and ADV-AGTA. This work was carried out within the ‘VALERE: VAnviteLli pEr la RicErca’ project.

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