Bounds for Behrend's conjecture on the canonical reduction
classification
🧮 math.AG
keywords
conjecturebehrendboundsbundlescanonicalgroupsreductioncase
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We prove Behrend's conjecture on the rationality of the canonical reduction of principal bundles and reductive group schemes for classical groups and give new bounds for the conjecture for exceptional groups. However we find a counterexample in the case of G_2-bundles in characteristic 2.
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