Cycles on Siegel 3-folds and derivatives of Eisenstein series

Details Cycles on Siegel 3-folds and derivatives of Eisenstein series Cycles on Siegel 3-folds and derivatives of Eisenstein series

1997-11-20

arxiv.org/abs/alg-geom/9711025v1

Mathematics

Algebraic Geometry

AMSTeX

Scientific paper

We consider the Siegel modular variety of genus 2 and a p-integral model of it for a good prime p>2, which parametrizes principally polarized abelian varieties of dimension two with a level structure. We consider cycles on this model which are characterized by the existence of certain special endomorphisms, and their intersections. We characterize that part of the intersection which consists of isolated points in characteristic p only. Furthermore, we relate the (naive) intersection multiplicities of the cycles at isolated points to special values of derivatives of certain Eisenstein series on the metaplectic group in 8 variables.

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