In Memoriam of Prof. Gerhard Kreißelmeier

The Control and System Theory group learned with sadness that Prof. Dr. Gerhard Kreißelmeier passed away in October 2021 at the age of 78. Prof. Kreißelmeier formed and led the chair successfully from April 1985 up to his retirement in September 2008. He was a passionate researcher, invariably following the maxim "there is nothing more practical than a sound theory". By his research work on adaptive control, observer design for nonlinear systems, and computer-aided control design, he gained international reputation, and he profoundly educated many generations of undergraduate and graduates students of control theory in the department. He will be remembered for his academic achievements and his dedication.

Prof. Dr. Arno Linnemann, Prof. Dr. Olaf Stursberg