Born : August 5-th 1932 Heerhugowaard, The Netherlands
Married with : Alice Madeleine Santen
Children : Hugo (1959), Marc (1960), Monica (1962), David (1966)
Education
Primary School: Heerhugowaard 1939-1945
High School: (gymnasium 
), Alkmaar 1945-1951
University: Amsterdam 1951-1962
Doctoraal Physics June 20-th 1956
Ph. D. Physics May 2-nd 1962
Thesis: ``Diagram Techniques in Statistical Mechanics''
Thesis Advisor: J. de Boer
Employment
1954-1956 Assistant in Physics, University of Amsterdam
1956-1962 Scientific Collaborator, University of Amsterdam
1962-1969 Scientific Collaborator. Catholic University, Nijmegen
1963-1964 Postdoc, Cornell University (with B. Widom),Ithaca, NY, USA
1964-1965 Postdoc, NBS (with M. S. Green) Washington DC, USA
1967-1968 Visiting Associate Professor, Rockefeller University, New York, NY, USA
1968-1969 Associate Professor, Temple University,
Philadelphia, PA, USA
1969-1986 Full Professor, Technisch Hogeschool, Delft, The Netherlands
1986-present Full Professor, Rijksuniversiteit Leiden, The Netherlands
Professional Activities/Memberships
- Nederlandse Natuurkundige Vereniging
- American Physical Society
- European Physical Society
- Advisory Editorial Board Physica A
- Organizing Committee Summerschools
``Fundamental Problems in Statistical Mechanics''
Wageningen, The Netherlands 1974
Jadwisin, Poland 1977
Enschedé, The Netherlands, 1980
Trondheim, Norway 1984
- Statistical Physics Section FOM (1984-1989 Chairman)
- IUPAP Commission on Statistical Physics (1986-1989 Chairman)
- Chairman Sectie Natuurkunde en Sterrenkunde KNAW 1992-1997
Honors
- Member Koninklijke Akademie van Wetenschappen 1985-
- Honorary Doctorate Catholic University of America 1988
- Fellow of the American Physical Society 1994
- Recipient Onsager Medal (Univ. of Trondheim) 1996