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arxiv: 1708.00046 · v3 · pith:Y3KNJRWMnew · submitted 2017-07-31 · 🧮 math.GR · math.RT

On the mod p reduction of orthogonal representations

classification 🧮 math.GR math.RT
keywords orthogonalreductionrepresentationsalgebrasessentialfactgeneralizeinvolution
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We show that the reduction mod p of an orthogonal linear representation is orthogonal, and we generalize this fact to representations of algebras with involution.The proofs make an essential use of the notion of " middle lattices ".

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