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Reduction theory for stably graded Lie algebras (2405.10217v2)
Published 16 May 2024 in math.NT and math.RT
Abstract: We define a reduction covariant for the representations a la Vinberg associated to stably graded Lie algebras. We then give an analogue of the LLL algorithm for the odd split special orthogonal group and show how this can be combined with our theory to effectively reduce the coefficients of vectors in a representation connected to 2-descent for odd hyperelliptic curves.
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