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2009•Proceedings of the Edinburgh Mathematical SocietyOpen access

Endotrivial modules for the symmetric and alternating groups

Jon Carlson, Nadia Mazza, Daniel K. Nakano

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Abstract

Abstract In this paper we determine the group of endotrivial modules for certain symmetric and alternating groups in characteristic p. If p = 2, then the group is generated by the class of Ωn(k) except in a few low degrees. If p > 2, then the group is only determined for degrees less than p2. In these cases we show that there are several Young modules which are endotrivial.

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Abstract In this paper we determine the group of endotrivial modules for certain symmetric and alternating groups in characteristic p. If p = 2, then the group is generated by the class of Ωn(k) except in a few low degrees. If p > 2, then the group is only determined for degrees less than p2. In these cases we show that there are several Young modules which are endotrivial.

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Available abstract

Abstract In this paper we determine the group of endotrivial modules for certain symmetric and alternating groups in characteristic p. If p = 2, then the group is generated by the class of Ωn(k) except in a few low degrees. If p > 2, then the group is only determined for degrees less than p2. In these cases we show that there are several Young modules which are endotrivial.

Key concepts: Alternating group, Covering groups of the alternating and symmetric groups, Symmetric group, Group (periodic table), Mathematics, Class (philosophy), Combinatorics, Physics

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