HENK Barendregt (1947) holds the chair of Foundations of MATHEMATICS and Computer Science at Radboud University Nijmegen, The Netherlands, and is adjunct professor at Carnegie Mellon University, Pittsburgh Pennsylvania, USA.
Since 1990, Dr. HENK A. van der Vorst is a full professor in applied MATHEMATICS with the Mathematical Institute of Utrecht University. Earlier he held a similar position at the Delft University of Technology (1984-1990).
Prof. Dr. HENK W. Broer is since 1991 professor of Dynamical Systems at the University of Groningen working at the Department of MATHEMATICS. He is heading the group Dynamical Systems and Mathematical Physics.