Mathematics – Algebraic Geometry
Scientific paper
2003-05-06
Mathematics
Algebraic Geometry
7 pages
Scientific paper
We consider the cohomology of local systems on the moduli space of curves of
genus 2 and the moduli space of abelian surfaces. We give an explicit formula
for the Eisenstein cohomology and a conjectural formula for the endoscopic
contribution. We show how counting curves over finite fields provides us with
detailed information about Siegel modular forms.
der Geer Gerard van
Faber Carel
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