You're in luck! Syntopia generative art blog just published a nice intro
Building 4D Polytopes With WebGL
https://syntopia.github.io/Polytopia/polytopes.html
Personally, I like computational probability. Theoretically I believe it falls under the more formal rubric of "measure theory". With stochastic processes remaining a very active field. Particularly around nascent quantum computing algorithms, quantum walks, etc.
Probabilistic Models of Cognition