Two more students in the Applied Category Theory 2018 school wrote a blog article about something they read:
• Eliana Lorch and Joshua Tan, The behavioral approach to systems theory, The n-Category Café, 15 June 2018.
Eliana Lorch is a mathematician based in San Francisco. Joshua Tan is a grad student in computer science at the University of Oxford and one of the organizers of Applied Category Theory 2018.
They wrote a great summary of this paper, which has been an inspiration to me and many others:
• Jan Willems, The behavioral approach to open and interconnected systems, IEEE Control Systems 27 (2007), 46–99.
They also list many papers influenced by it, and raise a couple of interesting problems with Willems’ idea, which can probably be handled by generalizing it.