A Chinese mystery crime movie. The math is a bit weird. A long stretch of
the movie deals with the function f(x) = sin(pi x) for x in [0,1] and log(2012,x)
for x larger or equal than 1. Then there are some calculus problems followed by
algebraic gibberish. The scribblings of Chen Zheng, the math genius helping
the police to decipher the secret are rather random like a+b+c=1+c. A bit like
asking an AI diffusion engine generate math formulas.
Thanks to Timofte Nicolae for suggesting the movie.