The classic movie Dr Zhivago features a tiny bit of
math. The scene is just a few seconds before Yuri sees Lara the first time. The moments when Lara is close
is always accompanied by the sound of the Balalaika.
The movie has grown to one of the greatest of all times. It was one of the first movies I myself have seen
in a movie theatre (as a kid) and had been affected a lot by the scene in which Yuri would see
Lara the last time falling dead onto the street without her noticing.
Also the original book of Pasternak mentions math a couple of times:
Page 50: Shura Shlesinger knew mathematics, esoteric Indian doctrine, the
addresses of the best-known teachers at the Moscow Conservatory, who was
living with whom, and God only knows what else. For this reason she was
called in, as arbiter and organizer, on all important occasions in life.
Pavel Pavlovich had graduated in classics. He taught Latin and ancient
history. But from his earlier Realgymnasium days he had kept a half-forgotten
passion for the exact sciences, physics and mathematics, and it had now
suddenly revived in him. Teaching himself at home, he had reached university
standard in these subjects, and dreamed of taking his degree, specializing in
some branch of mathematics, and moving with his family to Petersburg.