Remembering Prof. R.E. Kalman and His Center for Mathematical System Theory [Historical Perspectives]

Prof. Rudolf E. Kalman's name was already a "brand" as a founder of modern control theory before I joined his center, the Center for Mathematical System Theory (CMST) at the University of Florida, as a student in 1975. By that time, he had published his seminal works on optimal control, minimal realization, linear system structure, Lyapunov stability, and Kalman filters (some of them coauthored) [1]. In the control-theory textbook by Prof. Furuta, I saw a picture of Kalman sitting at his desk, taken in his office at CMST; for some reason I remember this picture as clearly as I remember him.