Conference ``Low-dimensional varieties in positive characteristic" on characteristic geometry.
C. Faber, G. van der Geer.
Amsterdam Summer Workshop ``String Theory and Black Holes"
Amsterdam, July 6-24, 1998
First Dutch Spring School on Mathematical Physics
Nijmegen, March 8-12, 1999
R. Dijkgraaf, N.P. Landsman
Third Texel Conference: Moduli of Abelian varieties
Texel, April 25-29, 1999
C. Faber, G. van der Geer
Amsterdam Summer Workshop ``String Theory, Gauge Theory and Gravity"
Amsterdam, July 5-17, 1999
Workshop ``Non-Commutative Gauge Theory''
Leiden, November 22-26, 1999
J. de Boer, R. Dijkgraaf