Home Page of / Webstek van Gerard van der Geer


a recent picture , a portrait , and another picture

Emeritus Professor of Algebra (Universiteit van Amsterdam)
Part-time member YMSC (Tsinghua University, Beijing)
Professeur invité (Université du Luxembourg)



  • KdV Instituut, Yau Mathematical Sciences Center, MRI Université du Luxembourg

    Postadres/Mail Address

    Korteweg-de Vries Instituut, Universiteit van Amsterdam
    Postbus 94248
    1090 GE Amsterdam, The Netherlands
    tel. +31-20-5255247
    e-mail: geer at science.uva.nl

    Bezoekadres/Visitor's Address

    Adres met kaart/Visitor's address with map
    Korteweg-de Vries Instituut, Universiteit van Amsterdam
    Science Park 105-107, 1098 XG Amsterdam

  • short CV
  • recent publications
  • manuscript Abelian Varieties
  • a website Siegel Modular Forms of Degree 2 and 3 with information on Siegel modular forms of degree 2 and degree 3.
  • website manYPoints with tables of curves with many points
  • the 'old' tables of curves with many points the pdf version (last update October 7, 2009)
  • Oberwolfach Conference " Moduli spaces and modular forms" (Feb 1-Feb 5, 2021)
  • Conference "Rationality of Varieties" on Schiermonnikoog, 15-19 April, 2019
  • Foundation Compositio Mathematica and the journals Compositio Mathematica, and Algebraic Geometry
  • Lectures on Siegel Modular Forms (Fall 2020, YMSC, Tsinghua University) lectures via zoom. You can find lecture notes here.
  • Siegel modular forms (Luxembourg 2020); partly given via Webex.
  • Course Curves over Finite Fields (2019) The times and rooms are: Tuesday 15:20-16:55 Discussion room (112) in Jing Zhai; Thursday 13:30-15:05 Main Lecture Hall Jin Chun Yuan West Building.
  • Course on Abelian Varieties (2018) Lecture Notes

    geer at science.uva.nl