John David Smillie (born February 18, 1953, in Ithaca, New York) is an American mathematician, specializing in dynamical systems.
[4] His Ph.D. thesis Affinely flat manifolds was supervised by Richard Lashof.
He was a postdoc for the academic year 1981–1982 at the University of California, Berkeley, and for the academic year 1982–1983 at Graduate Center of the City University of New York (CUNY).
[7] His research deals with "polygonal billiards and dynamics of flows on Teichmüller space; analysis of algorithms; and diffeomorphisms of surfaces",[1] as well as "translation surfaces and complex dynamics in higher dimensions".
He has given talks in the USA, Canada, France, Italy, Israel, Brazil, and China.