Fall 2001
The first two meetings this semester are largely devoted to
zeta functions in order to prepare for the meeting on Sep 17.
In four lectures Daqing Wan will give a reasonably selfcontained introduction to the proof of Dwork's conjecture, at the level of "linear algebra and calculus" over "padic power series rings". The general theme of these lectures is geometric and arithmetic variation of zeta functions over finite fields. René Schoof, Bart de Smit and Hendrik Lenstra will give three lectures to review basic properties and examples of zeta functions in an arithmetic setting.  
Aug 31  Mathematisch Instituut Utrecht, Room K11 (map/route) 
11:0011:50  René Schoof, Zeta functions I 
12:1013:00  Daqing Wan, Introduction to Dwork's Conjecture I 
14:0014:50  Daqing Wan, Introduction to Dwork's Conjecture II 
15:0015:50  Gunther Cornelissen,
Diangle groups and their deformations
Abstract: Triangle groups are a well known object in the theory of Riemann surfaces. This talk is about the fact that "diangle groups" exist in the theory of nonarchimedean uniformization of curves in positive characteristic, how to classify them and use them to determine automorphism groups of Mumford curves (analogue of Hurwitz's bound) and equivariant deformation spaces of such curves. 
Sep 7 
Mathematisch Instituut Leiden,
Room 404
Peter Stevenhagen will give his inaugural lecture at 4 PM in the Academiegebouw (Rapenburg 73). 
10:0010:50  Bart de Smit, Zeta functions II 
11:1012:00  Hendrik Lenstra, Zeta functions III 
13:0013:50  Daqing Wan, Introduction to Dwork's Conjecture III 
14:1015:00  Daqing Wan, Introduction to Dwork's Conjecture IV 
11:3012:20  Roland Auer, Legendre elliptic curves over finite fields 
13:2015:10  Marius van der Put, A description of the universal differential Galois group 
15:3016:20  GertJan van der Heiden, A Weil pairing for Drinfeld modules 
11:0012:00  Hendrik Lenstra, Construction of the Witt ring 
12:1513:15 
Jesse Elliott,
Generalized Witt Vectors from Profinite Groups I

14:3015:30  Jesse Elliott, Generalized Witt Vectors from Profinite Groups II 
16:0017:00  Hendrik Lenstra, Witt rings and zeta functions 
November 9, Amsterdam (UvA), Room P017.
11:0012:00  Gerard van der Geer, Counting curves over finite fields and Siegel modular forms 
12:1513:15  A. Biró (Budapest) On the class number one problem for special real quadratic fields 
14:3016:30  Harm Voskuil, Mumford curves, discontinuous groups and coverings of the projective line 
Preparatory meeting for the workshop Anabelian geometry
11:0013:00  Hendrik Lenstra, Introduction to the algebraic fundamental group 
14:0016:00  Ben Moonen, Introduction to padic Hodge theory 