Journal für die reine und angewandte Mathematik ( IF 1.486 ) Pub Date : 2021-01-09 , DOI: 10.1515/crelle-2020-0048
Thomas Krämer

We show that any Weyl group orbit of weights for the Tannakian group of semisimple holonomic $𝒟$-modules on an abelian variety is realized by a Lagrangian cycle on the cotangent bundle. As applications we discuss a weak solution to the Schottky problem in genus five, an obstruction for the existence of summands of subvarieties on abelian varieties, and a criterion for the simplicity of the arising Lie algebras.

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