Pi (1998) directed by Darren Aronofsky
Math here is used more as a way of showcasing the main character's madness than actual mathematical thinking.
It you like maths, you may want to watch Futurama, especially the "The Prisoner of Benda" episode, where they made an actual theorem just for the episode, and the formal proof can be seen on screen for a short time.
All without sex scenes, silly jokes or some out of order music...
I highly recommend this movie to everyone - I have never seen anything like it for past 20 years...
> My hypothesis: Within the stock market, there is a pattern as well. Right in front of me. Hiding behind the numbers. Always has been.
If you like this movie's stylistics, I'd recommend you to give Tetsuo: The Iron Man (1989) a chance!
Both are filmed black and white, both have amazing soundtracks and have industrial and cyberpunk culture influences. The camera work and the cinematography on the tetsuo is beyond epic
I mean i know that aspect of theology in PI is "not realistic" as well, but Tetsuo is just pure madness on LSD.