No, it's not 18.03 (which is differential equation). Check the syllabus.
http://www.ellerman.org/wp-content/uploads/2016/06/Guidi-Not...
Seems that after Gian-Carlo Rota died, the class is defunct. The closet one can get is 18.175, but it still presents material from purely theoretical standpoint (e.g. no application to physics to CS).