Institute for Mathematics, Astrophysics and Particle Physics
of Science, Mathematics and Computing Science
Radboud University Nijmegen
Postbus 9010, 6500 GL Nijmegen (post adress)
Heyendaalseweg 135, 6525 AJ
office: HG03.717 in the
(see the campus map)
of the β-faculty
tel: +31-24-365 3225
fax: +31-24-365 2140
Deze pagina in het
In the autumn-semester of the academic year 2017/2018 I am teaching the
and in the spring semester 2018 I will be teaching:
- Mathematics for first year students biology.
- Discrete Mathematics for second year students mathematics.
More information on this and on my teaching activities from previous years
can be found on my
page (in Dutch).
- Groups and Representations for second year students mathematics.
- Examinator for the Portfolio.
My principal research interests lie in algorithmic group theory and
An application hereof lies in mathematical crystallography,
where I'm a consultant of the IUCr Commission on
Mathematical and Theoretical Crystallography
(after being a member from 2005-2014).
On Friday, February 23rd 2007, a
DIAMANT Intercity Seminar on Crystallography took place
in HG00.068 of the Huygens-building at the Radboud University Nijmegen.
See the list of
for an overview of my research topics.
More generally, I am working on various aspects of computer algebra.
In the year 1996/97, I have been working with the Magma group at
the Univeristy of Sydney, contributing mainly to the packages on
groups, representations, lattices and local fields.
Depending on the specific tasks, I usually use the
computer algebra packages.
Outside pure mathematics, I have been working on
automatic speech recognition at the Philips research labs in
Aachen (Germany) from 1998-2000
page for some papers from that period).
Since 1 september 2011 I have been program coordinator for the bachelor and
master programs in mathematics at Radboud University.
As of 1 september 2016 the coordination of the master program
has been taken over by Klaas Landsman and my responsibility is focused
on the bachelor program.
From 2003 to 2009, I represented the mathematics group in the
onderdeelcommissie (OC) of the faculty.
The OC (together with student representatives and the faculty management)
forms part of the
Facultaire Gezamenlijke Vergadering (FGV)
and is part of the workers' participation at the RU.
More information (in Dutch) on the OC can be found