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Young modules for symmetric groups

Published online by Cambridge University Press:  09 April 2009

Karin Erdmann
Affiliation:
Mathematical Institute24-29 St. Giles, Oxford OX1 3LB, United Kingdom, e-mail: [email protected]
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Abstract

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Let K be a field of characteristic p. The permutation modules associated to partitions of n, usually denoted as Mλ, play a central role not only for symmetric groups but also for general linear groups, via Schur algebras. The indecomposable direct summands of these Mλ were parametrized by James; they are now known as Young modules; and Klyachko and Grabmeier developed a ‘Green correspondence’ for Young modules. The original parametrization used Schur algebras; and James remarked that he did not know a proof using only the representation theory of symmetric groups. We will give such proof, and we will at the same time also prove the correspondence result, by using only the Brauer construction, which is valid for arbitrary finite groups.

Type
Research Article
Copyright
Copyright © Australian Mathematical Society 2001

References

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