The Loewy length of a tensor product of modules of a dihedral two-group

Details The Loewy length of a tensor product of modules of a dihedral two-group The Loewy length of a tensor product of modules of a dihedral two-group

2012-02-24

arxiv.org/abs/1202.5385v2

Mathematics

Representation Theory

20 pages

Scientific paper

While the finite-dimensional modules of the dihedral 2-groups over fields of characteristic 2 were classified over 30 years ago, very little is known about the tensor products of such modules. In this article, we compute the Loewy length of the tensor product of two modules of a dihedral two-group in characteristic 2. As an immediate consequence, we determine when such a tensor product has a projective direct summand.

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