13 citations · 15 across the 9 of their papers we have counts for
7 papers · 1 filter
Cycle Classes of the E-O Stratification on the Moduli of Abelian Varieties
Torsten Ekedahl, Gerard van der Geer
We introduce a stratification on the space of symplectic flags on the de Rham bundle of the universal principally polarized abelian variety in positive characteristic and study its…
Cycles Representing The Top Chern Class of the Hodge Bundle on the Moduli Space of Abelian Varieties
Torsten Ekedahl, Gerard van der Geer
We give a generalization to higher genera of the famous formula for genus 1. We also compute the classes of certain strata in the Satake compactification as elements of th…
Tangent lifting of deformations in mixed characteristic
Torsten Ekedahl, Nick I. Shepherd-Barron
This article presents a new approach to the unobstructedness result for deformations of Calabi-Yau varieties by introducing the tangent lifting property for a functor on artinian l…
On non-liftable Calabi-Yau threefolds
Torsten Ekedahl
Only two ways to construct non-liftable Calabi-Yau threefolds are currently known, one example by Hirokado and one method of Schröer. This article computes some cohomological invar…
The order of the top Chern class of the Hodge bundle on the moduli space of abelian varieties
Torsten Ekedahl, Gerard van der Geer
We give upper and lower bounds for the order of the top Chern class of the Hodge bundle on the moduli space of principally polarized abelian varieties.
On Abel's hyperelliptic curves
Torsten Ekedahl
In this note we discuss a class of hyperelliptic curves introduced by Abel in a 1826 paper. After some indications of the context in which he introduced them and a description of h…