 The Behavioral Approach to Open and Interconnected Systems by Jan C. Willems

IEEE Control Systems Magazine27(6),46–99, December2007. DOI10.1109/MCS.2007.906923. Title-page byline Jan C. Willems. Printed pp46–49 introduce relations, shared-variable interconnection and modeling by tearing, zooming and linking; the section What Is a Dynamical System? defines time axis, signal space and behavior.