The only math in the film is that the main character studies mathematics. I loved that and loved the film. Usually mathematicians in the movies are the strangest people. Here not, he is pretty normal. He is acute and intelligent, but not a nerd, no following patterns everywhere. He preffers to follow girls like most of the mathematicians I know. In fact, he was very similar to a classmate I had when I studied mathematics. (It may have helped that Rohmer, the director, did study mathematics)