Associate Professor of
Department of Applied Mathematical Analysis
Faculty of Electrical Engineering, Mathematics
and Computer Science
Delft University of Technology
Tel: +31 15-2782519
Fax: +31 15-2787209
here to find out more about IDR(s): papers, MATLAB, Fortran and
Python code and examples. IDR(s)
is an efficient
Krylov method for solving large sparse nonsymmetric systems of linear
The figure shows the convergence of IDR(s) and Bi-CGSTAB for a Helmholtz problem.
IDR(s) is a short recurrence method. The overhead per iteration is comparable with that of Bi-CGSTAB.
Together with Andrew Webb (LUMC) and Rob Remis (TUD) we received an award to make a simple MRI scanner for use in developing countries.
See this movie about the need for a sustainable MRI device to diagnose hydrocephalus.
See also this article about our project.
Click here for my list of publications.
Numerical linear algebra
Krylov subspace methods
Least squares problems, regularisation
Finite element method
Parallel and grid computing
Acoustics and elastic wave propagation
ROBLINKS (underwater communication)
ACME (underwater communication)
Numerical Analysis Special Topics (WI4012TA)
Numerical methods I (TW2060)