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Components of the Involution Module in Blocks with Cyclic or Klein-Four Defect Group

Murray, John (2008) Components of the Involution Module in Blocks with Cyclic or Klein-Four Defect Group. Journal of Group Theory, 1 (11). pp. 43-62. ISSN 1433-5883

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Abstract

Each p-block of a nite group has an associated defect group, which is a p-subgroup of the group. Each real 2-block has, in addition, an associated extended defect group, which is is a 2-subgroup of the group that contains a defect group as a subgroup of index 2. We consider the possible extended defect groups of a real 2-block that has a cyclic or a Klein-four defect group. In each case we describe the modules in the block that are components in the permutation module of the group acting by conjugation on its involutions. We also determine the Frobenius-Schur indicators of the irreducible characters in the block.

Item Type: Article
Keywords: Frobenius-Schur indicator, p-permutation module, involutions, cyclic defect, Klein-four defect
Subjects: Science & Engineering > Mathematics
Item ID: 1994
Depositing User: Dr. John Murray
Date Deposited: 16 Jun 2010 15:56
Journal or Publication Title: Journal of Group Theory
Publisher: de Gruyter
Refereed: Yes
URI:

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