Investigating Overparameterization for Non-Negative Matrix Factorization in Collaborative Filtering.
Yuhi KawakamiMahito SugiyamaPublished in: RecSys (2021)
Keyphrases
- negative matrix factorization
- collaborative filtering
- matrix factorization
- recommender systems
- nonnegative matrix factorization
- low rank
- tensor factorization
- constrained least squares
- user preferences
- missing data
- document clustering
- sparsity constraints
- sparse representation
- recommendation systems
- latent semantic space
- unsupervised learning
- principal component analysis
- information extraction
- knowledge discovery