A note on group rings with trivial units

Chin, Angelina Yan Mui (2022) A note on group rings with trivial units. Bulletin of The Australian Mathematical Society, 105 (2). pp. 243-247. ISSN 0004-9727, DOI https://doi.org/10.1017/S0004972721000563.

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Abstract

Let R be a ring with identity of characteristic two and G a nontrivial torsion group. We show that if the units in the group ring RG are all trivial, then G must be cyclic of order two or three. We also consider the case where R is a commutative ring with identity of odd prime characteristic and G is a nontrivial locally finite group. We show that in this case, if the units in RG are all trivial, then G must be cyclic of order two. These results improve on a result of Herman et al. 'Trivial units for group rings with G-adapted coefficient rings', Canad. Math. Bull. 48(1) (2005), 80-89].

Item Type: Article
Funders: None
Uncontrolled Keywords: Group ring; Unit; Torsion group; Locally finite group
Subjects: Q Science > QA Mathematics
Divisions: Faculty of Science
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 25 Apr 2022 06:20
Last Modified: 25 Apr 2022 06:20
URI: http://eprints.um.edu.my/id/eprint/33810

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