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- From: mkrogers@unix.amherst.edu (MICHAEL K ROGERS)
- Newsgroups: sci.math
- Subject: Re: Matrices as Group Sub-Algebras ?
- Message-ID: <Bw2Ez7.GEz@unix.amherst.edu>
- Date: 13 Oct 92 14:59:30 GMT
- References: <1992Oct12.142642.9575@news.unige.ch>
- Sender: news@unix.amherst.edu (No News is Good News)
- Organization: Amherst College
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- BORIS Borcic (borbor@divsun.unige.ch) wrote:
- :
- : There are probably other ways to look into. My question
- : boils down to : are there any (standard, simple) ways
- : to construct endomorphisms from matrix algebra into
- : group algebra ?
-
- If K has characteristic zero and $G$ is finite, then
- K[G] is isomorphic to a product of matrix algebras
- over skew fields. Look up semisimplicity in the algebra
- books by Lang or van der Waerden, or for just a statement,
- Serre, Representations lineares de groupes finis, ch. 6.
-