February 4, 2021

## Implicit Recommender Systems with Alternating Least Squares

http://activisiongamescience.github.io/2016/01/11/Implicit-Recommender-Systems-Biased-Matrix-Factorization/ In today’s post, we will explain a certain algorithm for matrix factorization models for recommender systems which goes by […]
January 16, 2020

## Derivatives: definitions, notation, and rules

http://www.columbia.edu/itc/sipa/math/calc_rules_func_var.html#chain A derivative is a function which measures the slope.  It depends upon x in some way, and is found […]