Slides of a lecture on transporttheory held at the University of Amsterdam on April 25 2001 (postscript)

Slides of a lecture on nonlinear matrix equations held at the University of Utrecht on April 24 2001 (postscript)

Slides of the lecture at the ILAS meeting in Haifa 2001 (pdf) on Symmetric factorization, Riccati equations and Bezoutians.

Slides of the lectures held in Cagliari in March 2002 (postscript) on nonlinear matrix equations.

Slides of the lecture at ILAS 2002 in Auburn (pdf) on nonlinear matrix equations. Joint work with M.C.B. Reurings and S. El-Sayed.

Slides of the lecture at IWOTA 2002 in Blacksburg (ps) on a fixed point theorem and applications to nonlinear matrix equations. Joint work with M.C.B. Reurings.

Slides of the lecture at IWOTA 2003 in Cagliari (pdf) on perturbation results for bi-semigroups. Joint work with C.V.M. van der Mee.

Slides of the lecture at SIAM Linear Algebra conference in Williamsburg 2003 (pdf) on polar decompositions in Pontryagin spaces. Joint work with C.V.M. van der Mee and L. Rodman.

Slides of the lecture at Calgary on November 6, 2003 (pdf) on polar decomposition in spaces with an indefinite inner product. Joint work with Y. Bolshakov, B. Reichstein, C.V.M. van der Mee and L. Rodman.

Slides of the lecture at the IWOTA 2004 meeting in Newcastle (pdf) on Krein's theorem, inertia of hermitian Toeplitz matrices and orthogonal matrix polynomials. A similar lecture was held in Berlin on the 2003 workshop on operators in Krein spaces. Joint work with L. Lerer.

Slides of the lecture at the 4th Workshop Operator Theory in Krein spaces and Applications (2004) in Berlin (pdf) on integral operators with semi-separable kernels and symmetries. Joint work with G. Groenewald and M. Petersen.

Slides of the colloquium lecture at Delft (May 2005) (pdf) on perturbation of bi-semigroups, optimal control and approximation of solutions of algebraic Riccati equations. Joint work with C.V.M. van der Mee.

Slides of the lecture at the 5th Workshop Operator Theory in Krein spaces (2005) in Berlin (pdf) on hyponormal matrices in indefinite inner product spaces. Joint work with L. Rodman and C. Mehl.

Slides of the lecture at the 6th Workshop Operator Theory in Krein spaces (2006) in Berlin (pdf) on the connection between X^{[*]}X and XX^{[*]} in an indefinite inner product space. Joint work with J. Kes.

Slides of a colloquium lecture at the VU, January 2007 on stability of invariant subspaces of matrices.

Slides of the lecture at the 7th Workshop Operator Theory in Krein spaces (2007) in Berlin (pdf) on inertia theorems for infinite dimensional operators on a Hilbert space. Joint work with L. Lerer and I. Margulis.

Slides of the lecture at the 8th Workshop Operator Theory in Krein spaces (2008) in Berlin (pdf) on the spectral points of the operators T^{[*]}T and TT^{[*]} in a Krein space. Joint work with M. Wojtylak.

Slides of the lecture at the ILAS conference in 2010 in Pisa (pdf) Joint work with M. Wojtylak.

Slides of the semi-plenary lecture at the IWOTA 2010 in Berlin (pdf) on eigenvalues of rank one perturbations of matrices. Joint work, with: Chr. Mehl, V. Mehrmann, L. Rodman; also with D. Janse van Rensburg, G. Groenewald, J. Fourie; and finally also with M. Wojtylak.

Slides of the session lecture at the IWOTA 2010 in Berlin (pdf) on discrete Riccati equations and block Toeplitz matrices. Joint work with L. Lerer.

Slides of the session lecture at the ILAS 2011 conference in Braunschweig (pdf) on controllability concepts for coordinated linear systems. Joint work with P.L. Kemker and J.H. van Schuppen.

Slides of the lecture at Potchefstroom in 2011 (pdf)
on right invertible Toeplitz operators and stable rational solutions to
an associated Bezout equation. Joint work with A. Frazho and M.A. Kaashoek.