Keyphrases
- matrix factorization
- collaborative filtering
- recommender systems
- missing data
- low rank
- factorization methods
- negative matrix factorization
- variational bayesian
- item recommendation
- factor analysis
- nonnegative matrix factorization
- probabilistic matrix factorization
- data sparsity
- implicit feedback
- multiscale
- personalized ranking
- data matrix
- stochastic gradient descent
- latent factors
- convex optimization
- data sets