We use an application of singular value decomposition in our search products, in particular Latent Semantic Indexing: http://en.wikipedia.org/wiki/Latent_semant

We use an application of singular value decomposition in our search products, in particular Latent Semantic Indexing: http://en.wikipedia.org/wiki/Latent_semantic_indexing http://en.wikipedia.org/wiki/Latent_semantic_indexing. This is being used to drive a "concept search" feature.