Singular value decomposition
SVD refers to singular value decomposition in linear algebra. However, in the field of collaborative filtering, SVD often means Matrix factorization.
SVD in Math
The traditional SVD can also be used as collaborative filtering algorithm. It's also named Latent Semantic Indexing in IR.
- [ http://en.wikipedia.org/wiki/Singular_value_decomposition ]
- [ http://en.wikipedia.org/wiki/Latent_semantic_indexing ]
Please refer to Matrix factorization