Components of the Involution Module in Blocks with Cyclic or Klein-Four Defect Group.
Journal of Group Theory, 1 (11).
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.
||Frobenius-Schur indicator, p-permutation module, involutions,
cyclic defect, Klein-four defect
||Faculty of Science and Engineering > Mathematics and Statistics
Dr. John Murray
||16 Jun 2010 15:56
|Journal or Publication Title:
||Journal of Group Theory
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