The Living Thing / Notebooks : Hidden variables and latent factors

This isn’t a thing per se. But I want a landing page for a few different ways to think about hidden variables.

If the hidden varaibles are random, I might think of hierarchical models, latent factors, deep networks, informative sampling, censored data…

If the hidden variables are deterministic I might think of algorithmic complexity.

Random thing: Matrix factorisation to approximate latent factors and their interaction in recommender systems.

KoBV09
Koren, Y., Bell, R., & Volinsky, C. (2009) Matrix Factorization Techniques for Recommender Systems. Computer, 42(8), 30–37. DOI.