Collaborative Filtering, Matrix Factorization, Recommender Systems, Gradient Descent, Neural Networks.
a neural network (NN) equipped with non-linear activation functions. Example of relation between linear and non-linear models where |U|= 4, |V|= 3 and K = 2 (image by author) Remember, U and V are latent factor parameter matrices. Latent meaning underlying representation, factor as they are