On isomorphisms between centers of integral group rings of finite groups
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Abstract:
For finite nilpotent groups $G$ and $G’$, and a $G$-adapted ring $S$ (the rational integers, for example), it is shown that any isomorphism between the centers of the group rings $SG$ and $SG’$ is monomial, i.e., maps class sums in $SG$ to class sums in $SG’$ up to multiplication with roots of unity. As a consequence, $G$ and $G’$ have identical character tables if and only if the centers of their integral group rings $\mathbb {Z} G$ and $\mathbb {Z} G’$ are isomorphic. In the course of the proof, a new proof of the class sum correspondence is given.References
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Additional Information
- Martin Hertweck
- Affiliation: Universität Stuttgart, Fachbereich Mathematik, IGT, 70569 Stuttgart, Germany
- Email: hertweck@mathematik.uni-stuttgart.de
- Received by editor(s): December 7, 2006
- Published electronically: January 8, 2008
- Communicated by: Jonathan I. Hall
- © Copyright 2008
American Mathematical Society
The copyright for this article reverts to public domain 28 years after publication. - Journal: Proc. Amer. Math. Soc. 136 (2008), 1539-1547
- MSC (2000): Primary 20C05, 20C15; Secondary 13F99
- DOI: https://doi.org/10.1090/S0002-9939-08-09252-6
- MathSciNet review: 2373581