About Me
Hans Zwart is Professor in Physical Systems and Control, and head of the Chair Hybrid Systems in the Department of Applied Mathematics at the University of Twente.
His research interests are in control and analysis of systems described by partial differential equation and/or time difference differential equations. The main focus is on the development and analysis of controllers for linear systems. Hereby using the mathematical techniques from functional analysis and Hamiltonian dynamics. Main area of applications is the controller design and analysis of flexible structures. On this topic he has a long lasting collaboration with research groups in BesanĂ§on, Lyon, Wuppertal, and Eindhoven. At Eindhoven University of Technology, department of Mechanical Engineering, he holds a onedayperweek professorship. Prof. H. Zwart is the coauthor of two standard text books in his field; An Introduction to InfiniteDimensional Systems Theory, (with R. Curtain) and Linear PortHamiltonian Systems on InfiniteDimensional Spaces (with B. Jacob).
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Since I like to construct counter examples. I list here some of the counter examples found.
 T+B is never invertible for suciently small B; pdffile
 If A generates an exponentially stable contraction semigroup, and Q is dissipative, then A+Q need not to generate a exponentially stable semigroup; pdffile
 A boundedly invertible and Q bounded, does not imply that AQ is densely defined; pdffile
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Based on the book ``An Introduction to InfiniteDimensional Linear Systems Theory'' some lectures were recorded. They may be found here: Lecture Infinite Dimensional Systems
The order of the videos are:
 1 05 Introduction and Semigroups
 1 01 Inputs and Outputs
 1 03 Transfer Functions
 1 04 Stability and Stabilizability
 1 02 PortHamiltonian Systems
Contact Details
Visiting Address
University of Twente
Faculty of Electrical Engineering, Mathematics & Computer Science
Zilverling
(building no. 11), room 3062
Hallenweg 19
7522NH Enschede
The Netherlands
Mailing Address
University of Twente
Faculty of Electrical Engineering, Mathematics & Computer Science
Zilverling
3062
P.O. Box 217
7500 AE Enschede
The Netherlands