The main topics of the course will be (finite flat) group schemes, $p$-divisible groups and descriptions of (categories of) $p$-divisible groups in terms of “linear algebra”, such as Dieudonné theory and/or Grothendieck-Messing theory.

In a sense, this course will be a continuation of the Course on formal groups of the previous term, but we will sort of start from scratch so that you can actually join in without knowing anything about formal group laws.

Schedule: Tue, 8:30-10:00 (S-U-4.02); Wed 10-12 (S-U-3.02). Exercise group: Mon, 2-4pm, O-3.46 (first session May, 8).

## Problem sheets

 Download Due date 1 pdf (updated May 16) May 3 2 pdf May 10 3 pdf May 17 4 pdf May 24 5 pdf May 31 6 pdf June 7 7 pdf June 14 8 pdf June 21 9 pdf June 28 10 pdf July 5 11 pdf July 12 12 pdf July 19

## Main References

J.-M. Fontaine, Groupes $p$-divisibles sur les corps locaux, Astérisque 47-48 (1977)

R. Pink, Finite group schemes, Lecture Notes

M. Demazure, Lectures on $p$-divisible groups, Springer Lecture Notes in Math. 302

B. Edixhoven, G. van der Geer, B. Moonen, Abelian varieties, in particular Ch. 3, Ch. 4.

W. Messing, The crystals associated to Barsotti-Tate groups: with applications to abelian schemes, Springer LNM 264 (1972)

D. Mumford, Abelian Varieties, Tata Inst./Oxford Univ. Press, in particular §§ 7, 11, 12.

S. Shatz, Group Schemes, Formal Groups, and $p$-divisible Groups, in: Cornell, Silverman (eds.), Arithmetic Geometry, Springer 1986

J. Stix, A course on finite flat group schemes and $p$-divisible groups, Lecture Notes

J. Tate, Finite flat group schemes, in: Cornell, Silverman, Stevens (eds.), Modular Forms and Fermat’s Last Theorem, Springer 1997