Newton polygons and formal groups: Conjectures by Manin and Grothendieck.
Families of -divisible groups with constant Newton polygon.
Which Abelian Surfaces are Products of Elliptic Curves ?
Elliptic Curves: Diophantine Torsion Solutions and Singular j-Invariants.
Finite group schemes, local moduli for abelian varieties, and lifting problems
Good and Stable Reduction of Abelian Varieties.
Subvarieties of Moduli Spaces.
Endomorphism algebras of complex tori.
Problems from the workshop on Automorphisms of Curves (Leiden, August, 2004)
In the week of August, 16th-20th of 2004, we organized a workshop about “Automorphisms of Curves” at the Lorentz Center in Leiden. The programme included two “problem sessions”. Some of the problems presented at the workshop were written down; this is our edition of these refereed and revised papers. Edited by Gunther Cornelissen and Frans Oort with contributions of I. Bouw; T. Chinburg; G. Cornelissen; C. Gasbarri; D. Glass; C. Lehr; M. Matignon; F. Oort; R. Pries; S. Wewers.
Families of supersingular abelian surfaces
Group schemes of prime order
Supersingular curves of genus two and class numbers
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